1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573af3f7656dcdf844a4b54b7979ae0f026e31f46dd9325e7d69c9a562d121b4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96055ab0-18cb-4cb7-b812-611d13445104.json and https://artists.proofprofile.net/proofs/artist/96055ab0-18cb-4cb7-b812-611d13445104.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5f96f4853075521438514083aa3fd003f1c4262fb7fb0ceb1cd3cd13b7c6af. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81101950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe662d24b99dcc1edb0adac49ab15340ff893033d9ecfa424b507e404c713c48. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:10:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81101951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77be5fbe9c4e5a01d39545a14ba64b66caad6d952f2b1eab914f946b46f77e77. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81101952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8b2cbb19a4b799891ac1d52534cab3e5fbf4b9a446c03be9a04dca8d311b2e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81101953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0376d30c52f8cbf4a837aaf8986db6155f4fe061f6e9c60a63fa70ecc30056. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1212833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8283ebdc9f1af80fcc2e4807206ebb086dc962e313a2c5759b3cb55ac57b5f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:57:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1212835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8cad489f45bd25a44c6764467380880dfcf93e03dfcc786fbbeed8966cb371. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1212838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159653b46f1ab8e38df229c64b531a4437bbfca17198d82502caec0210616241. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1212841.
Don't Have to Worry (feat. Josh Heinrichs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0d81dd56a909c20a2a0e74b92aa29a85a9397e2909ccc8928d932a02d69662. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USX9P1204912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22fcaef66f3fd67613506494e852bd31d7923eb8f85a76f0ee80e04f0355e2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91329855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b9d8727d673f831d6a375e7f1263a70c5141e1bfe23f94a795a930a994a04e. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91329856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47df68b5b4f53d9e4fba29598bb5da6af52744d7fcb2fe2ffad99d8154d3fb7. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADB1708037.
Specialist (feat. Josh Heinrichs & Marlon Asher)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41746d725c0f356f559aa8c92f8d228383817048f72f6dae2eb066123425e72. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADB1708050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eb612c8b6f9aa0284df543fe0d6372017c62f0ff5be071b535e6fe903dc576. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2164599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74b7586782abd6581b7ecd75960beb5e490ee71d55bd26308431f00d12dbdd5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42140247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd274bd06e0b1646c6354037b30b4fef2130c1d6c48742404c9564a4f5d711b31. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2109569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd56c3d44ecac2459eed617043ca678ea3ab476a765ed52e09e5a4f0db7f519f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2141738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712b2f448a7039062c0c2f349ffaf4e34de3b55eb421a0bcfc3716d4d0669a83. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:15:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7T2401653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b525f27c675f0bb4f3458858892e7261e8cc65fbaaf3e08de2d63dd85d3a123. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7T2401656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49fcb26a540e51b0c0ecfd0e6c19f6bc47655f0d17959b37371ecd9ee7b08bf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7T2401659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8726ae67fc94574526662e352e3e84fbfae3676fcdea3255359e5844de93c4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42508809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c6f3031cb207519faed325379c5fe488a7a34f0a6ea44476b2a4d23dc83bb3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42508810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989667979ab07e74f635ce13590ff60e0f3564efd506a91bbc682a25ccd88bbe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82514850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e2f0dc0e3f3b4458cc3c8f199e05dc3bea2e70556450784bfbf96265516535. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBB2590554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb27efbf6ddeda86f4ae6831e83579e201ddb713f08fa9d46f05a7bcba9571f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2593164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e83aee3827c441db72c40f2098f5571aa33251a6ba4a49c85f0e6a47a2746. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2589935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4f2d81b56ea2be37725f904a6fb56585cd5a953710d39035a6e22d7fc74c0b. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:19:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2589936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4251c3b2c3db71fd2dd6b8d57b0087192d1e7219a908b2dfa7f11ce20543f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFQ2527069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcfb672df2bb01367ee6b016da0055be62e9282569c399d67734346e09e9514. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:50:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2587772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd6aa57935d5566381ebf2752b91284aa5e28c2d8ee0fdcc7a5b1e8d4e2a07b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F52579055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915dbbdb6d709a34b4ea2312a144719edf445aa8d53ed4cdfb7ee3e9ea19241e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWV32351572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f8d80604f3fe5d2df4ed82aec645fce36cda93613bb1ce1fde6ed410c2ced9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5U81800117.
Riddim Rydah (feat. Skillinjah & Dread Kennedy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bca69e5280b2ccc10a500e4e25c4c49416e76f9df1b0013c67dd67e4b4c6c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USME32100903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce0bc2aa21c24a9e1d39f73172980cd1201b87fff7707bceceded3325c5aa28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADP1859175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc72ddb5396a18047a4e7849562501c2bb8b7b0ef2d87afbf54ae835a6918543. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADP1859184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f4792d4f3e9e1cafefdf26cbdc216ba9b6ef40ef9e5db25a1f2877795c1048. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADP1859187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a2b866ae05a182d2d93eec12eae2bce987a952f45fd092f7b16ea18a81f8df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADP1859190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288233aeec083704c10f157d2a9f7fc233505eec790b224ddf09457a4f716dfc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADP1859197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572c436a9eaf2031fed1ddf0746251b0c2f994be0859075afba4dd9a4000823b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPYN2104427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fef056945824e7fe4e1ae50138659864ba46e3cf55ce3fef1f752568c88cefc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMGD72101012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01fcb55df82fc4f357dcca41804d21f6218b50f58fb3d5f9293e80b29d1b8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1720179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fbe289779cf2cdc5ff34344cba7f4db88a78399daee645f0ef3bd9c3195581. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92005505.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6369ab664818b1c6bff3f7eb9f4579e1843ffcb5caba690ff3730f151c91ffc. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPYN2211873.