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 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 0xf7174b2cda49cc9f476bf223b28e404047128120b3d3d882c57e1831fbd1738c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3be53b3c-7f01-409f-8f0e-04129ce91344.json and https://artists.proofprofile.net/proofs/artist/3be53b3c-7f01-409f-8f0e-04129ce91344.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 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 0x93d57352f0ed7533fb576eeb3bb5cf96956e01c15c01448ef37a018599246c0f. 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/PT2DY2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf14391aa73d774d3c386df4b7496a6f11ec120d43dd06360f6df3e3d446ee1. 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/PT2DY2300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2290682bbc461208d5f238fddd72a491c9eeabcee5e1559ca8ad8ae273d13dc8. 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/PT2DY2300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3431cc2e94862d81ccfe9fb73fd1932352f67ff1c14fde02214ac2fa186406a2. 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/PT2DY2300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6af088917cceda389ccfdfbd4f28121881b4e8753107a0d1f04501b59766e69. 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/PT2DY2300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1b921e5fb057b3e3c6efd8517783443523ff9bb6c474eaad4549ab1890c7a3. 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/PT2DY2300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0940f1676f5a9d9ef02827cc0d991533fdc9442d84b51f1f06abd19cfd7acd. 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/PT2DY2200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2307510a8088ae882505bf9f795edee9af796e8e18a539a644e25463eb119959. 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/PT2DY2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e85e6add5ebd42d8e345efb2bb94df56e902e137c5f3165ec02348001ddaf9. 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/QZES92217801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b493c6ce1a3cc379b224b482da1909a3abaaa451830efeb422de129d8221a28. 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/PT1IU2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace1ea862a2e5cf4b8e246ec5fdaa3af4410479fb6e2459bee32b325eeacf35. 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/PT1IU2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76662d0da409cbdbe499c637cf1a6e8b22974b7be37ad1b707ab36f6ced4542b. 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/QZK6P2013992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301b99814216550e73f9bfd932c8bc8d3cdbd9a5df27432d2bf923a886fa491c. 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/PT2DY2300721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf8991a622b40c7840dbb809010e2d210ef9d74e9aceb4c644bd74d1fbac8ff. 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/PT2DY2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23207ed6e63b0a042d22fe4dc492868def97e78f597e669fa5e1608d5cb20ca5. 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/PT2DY2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58bd0674470bd3a2decef4a17319567ea0a4fdf3c10376b1bc1344cef707bc2. 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/PT2DY2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f1dea10c3ccafc0ee40128bf5696fe16b2603685ecd62a4a59295336684e9c. 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/PT2DY2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5937397e430ea118ae11a48bb07721a94462869295147aecc2566b1837aaf3. 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/PT2DY2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80d75c4366399b499a643ddbbf47ec048982395a08b7e1ea0f1412e5c4fbab. 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/PT2DY2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb577876a95b56e312004d0bddfacb73d8f43b1c9071eef811af78c655d75f3fd. 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/PT2DY2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011629885a50d6d9672e46b8cec46fdb7fca9d3348d7816eb768d8c53a14b373. 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/PT2DY2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff6e616febd96d1b92fb40c29ecdf2c332d72158b0c05a721e219ce0860788. 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/PT2DY2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eefffc640533849eea5a505c2d7b153d063144c330ac1705a7c0a9c1644498. 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/PT2DY2200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82ac572d19fc859582ed972595be573289381d083fc7dd083d76f63ec3eaac. 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/PT2DY2200167.