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 0x144eb1d5e59bedf484f668c32f095e9f92567f4a5403df829ee53503e762f2a4. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89d60b1f-c790-4397-af72-9fd6944b2bba.json and https://artists.proofprofile.net/proofs/artist/89d60b1f-c790-4397-af72-9fd6944b2bba.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 0x7f1576fc89feb73e247a7cb3bb051b8bf13a69addc6ba15ec5cca036446aa5ef. 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/INS180246984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5803e9b1b79c20c44e5a43e536893941798d03e3c3442efa137c825d49b67f. 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/INS180246996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3c2b37bc6041ce6a0001e90e48a5c0363c905caf58625256fd1233f6e32cf8. 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/INS170000331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb9965e5f2d5621baa0fcab9f73a005cf1f997be4a766fe0e80d3d9e7ded048. 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/INS170000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4a38d16c3d796d7c2f77ff9e4bc638f9b0c45da7bdab28ce98d0d1cba5c135. 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/INS170000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c28594d71c485735db296513748745e2565206d98c43dc8a0db90c970478dd. 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/INS170000233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa001a7e6a415529904bd124718f8e207232097788757e76fe3705d4904934d. 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/INS170200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8414cb3409ebee821fc6246dafe888db53a8d6aad36b4a51657fa034d40bd9. 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/INS170200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35e1ce2b62ae56029792d4c46e2c8f5f1aea9a87b1dcbfc69bd2f022dbe601f. 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/INS170200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d585f180ae0261984735a55078dd3c048d5247428c3a200a480ec79f215c0db. 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/INS170000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4039bd741df9e4036027951db97a5cedaa714d5756ff9b9edd4133841055a3. 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/INS170000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300a7b6bf916a3318c2118177b1bfae4c14cc88e85a2cf34a622d796df317330. 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/INS170001171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aa0e2305190520e5d1d0c56cde20ee88ff1ef2bbadbeb0dd54762cf4fcf9b0. 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/FR6V82322281.
Punyai Hirvya Chudyachi (Original Motion Picture Soundtrack)