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 0x9e9e62c9e44f208cc76682f297c143c2ad02c6993f5a36b97924163f970513e5. 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/7a778e9b-ee50-47bc-9dd1-6877984c987f.json and https://artists.proofprofile.net/proofs/artist/7a778e9b-ee50-47bc-9dd1-6877984c987f.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 0x23a3b921f14bc0a91f415c9739c9e7bb77eac527ec790c83be67dfa7fbc0f896. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM2PV1716998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c027bb2371d480c57107300726c17efa515403056153c42569f39932f8ccb3. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T12:59:46Z), 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/QM2PV1716999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f5b603de3aa6fa2eea58c68f501a21e9a46613e0408a4a7ebea5d1a09a0ab8. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QM2PV1717000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02fbe2833fbe917770f1f73803a261817c52ac99d64bfd2b54c2307b82c88a4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZANL1750338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1527fe444792197668a3c113c633f5a48e5a7948d64d9e033fa8ce84c0c742. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZANL1750339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74039b724879337ac47d29ee78b9c6b47fe8730ff82bed14a844cccf61dbe12c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZANL1750342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf373ba785f4d83dc77ecf07668532fe7b78b6b94c6a2efe47ed87410a10c2237. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZANL1750345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895384f60d3542a17fbb724d9ddeb982c681ed82477a6c1ea8bcd8192fff96fb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZANL1750346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c012d4a9b88c1f3db075a7487a3cf29f699034f600dcf61723ea273b8ae20c0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN82066403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed79a7e98ae08b2793863c631cec62f0a6666018c778a24db5c9b72ed78d3c4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZG82210160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1adc04ee8ed35ce7a481cec1ae1c8f229cabdbc0791f03dbe9cf1fdee52ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZG82210170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e18352892ea39dc40ca884d7918b947432349b1f49501770fa85ca566d0a0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEZG92210180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b4c429a10160b480eb981d4d773d125ddbcb06132bcf9cbcb790a4b0a8a72b. 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/DEZG82210190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd5b2be05a4fadc91d16d9a0fbf015fbcffda9a378efaf453ebbe2d3ade768. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZG82210200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4480c636441b9eac05876b595f9391e5ce3bc52fe5c31c2fe3b12241f7ff1. 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/DEZG82210220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9841c2ddedd46934d2c2a9181e1bd9b738c3756376ca9f269305af78078278e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEZG92210230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c012d4a9b88c1f3db075a7487a3cf29f699034f600dcf61723ea273b8ae20c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN82066403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377f2ab08d76f5c1e033b134dd4b11616c8af4d47f561e027f13d60b04ee2c6. 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/QZDA72417776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872ff193c3143f46498f9156cfddd625a9078e4f783611d3ffb53a31b49b275a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZDA82588220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c3a8916aea06787797c6db6a1a45dbc3fbc0f5816479b68271bf6fd55af9f. 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/QZDA82588221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75d158da97b516a17eae273787f028458ecc48a42737db5098bb5808446287f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA82588226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e5aa4923a64e4fbfc785038a60c6fd73eb41ce2d274e0b376c44c7c396a61c. 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/QZDA82588228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f33c9cf041ef2db60e0f971e08dd26527c66cd1858b48e09fed8d81e644374. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZES52576441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d7d4d3b7a3598ee6c617d06e3d27ebb7967d514448fbc447a314f8bf59afcc. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZK6L2546073.