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 0x77e6e20db54f2df66e1cf680fb4ed5515a4bb9aaf57a14f2eb882f0b00c356f7. 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/a141b782-b561-4ec7-abbe-28160b456175.json and https://artists.proofprofile.net/proofs/artist/a141b782-b561-4ec7-abbe-28160b456175.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 0x68108f0844ed56de12e987db16e89f51714bdcba6b1d7a0a630100642d5df3bc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES52394918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2867b5539447bacd5cdbb52beb03703b914794f9972ac54a49de322410c8c68e. 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/QZWFK2396173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c089c32164310f245568166a5257c284a876c47eb20b3791d41ba3d88860c0. 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/AUMEV2467646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acfcf524820d0e73c8b52a005d986ad0a8dd85cbebd55c959c11103594f5b47. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUMEV2467649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba6711a0f8c86fceeb1586903d8acbee5456c22e571d1489c9c99643acdb7d. 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/AUMEV2467652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23df72ce4d9628ef6ec046e2e2f8c8ee9eb4f61465405b843c9dbba22fa8f04. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2467840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd3dadfc0ecad7e3f26786f5d60f46885a98b9d8967cabb6a7e5fe235bc63c9. 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/AUMEV2467851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17fd49bd21adcaeabd69a0659798aee44563ba341c7e249803d161643e4484c. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/AUMEV2467273.
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 0x3f6e38970dcdf6d7e7d8870749e4dc00a9ff19e1b0dc7f1e9b91ec6495257da0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUGBT2424460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e31da5c91470cc0c33d8dc1a4affeb3c1118e0fec9c02dc41ced7fe0870b4. 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/AUGBT2424464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c7a0a04153936c4287cb9adb3f9cd3b56ea2a8fa2fe7f81973686031eaac4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2424468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef9e794c3610a2d40772ed8f8162f3f491d661cf3f08b942266287137ba888. 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/AUGBT2424469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf5ae5fca1e24fd9216418d1529aae1d24b1822424d4d1bd00ac4a95d20af8. 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/AUGBT2424471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00063a3b2c052bf289a642825cb48b33a301211ff4121f1c4c3a6b6b31cd264d. 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/AUGBT2424476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed770f10a083c595e27bbbd96e6d8b1728efcbba0a7643adaafee036aa726058. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUGBT2424483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421987fb75b72b46d95f7c1bcc1d5ade1259cb0ec60c62d6c97a3e95383aebb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/AUGBT2424481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b85a617e29d8eba9d188c641c5a24bb2a1a14d6b983e97867d71bc21718f524. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/AUGBT2424467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113363cf37fb2a65a070e40585b2fb6a4e7c27e7a069fb6e3c79b28f04661d68. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/AUGBT2424474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacc7ad96e28670702bcae169dd609e3a9a119174dbea0807a3c4662b22e8bdb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AUGBT2424484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e587b795794a5ba025f454b7392e71d880aa4b504577619ad854308d494d43. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUGBT2424487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651bccdbe122a131c9f3f4334cbd884d5ac260b7020422c20eef8f497b5c1a91. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/AUGBT2424490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abf45986837fd5700a25f791c7f26233e82a460aa4785b5573f453e61fe0102. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AUGBT2424504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e3b9d500f74fec82e9098875c1b0b373001ae939f2cd46324bfda4913f4cb4. 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/QZWA32200009.