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 0x35b8f1f28415ec66a034b53b2ccb815ff4c54078d552cb153128f19011aea2fa. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc05a527-7040-4bfb-a039-2486ff1e632e.json and https://artists.proofprofile.net/proofs/artist/fc05a527-7040-4bfb-a039-2486ff1e632e.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 0xdb480c3396bf0d43c2946f983252feef71c8a3702e6ba647d029864b695059d1. 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/QT3F92547015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66e042b0e4e88bfce21bd0e3f358b7c949ceebf456d1e1eead6fe25cfa023ab. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT3FA2560851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8316c2dfb635a6609fe477d38076af1fe6ef3267687b8c753c2f3894cb82d9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3FD2534273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d25fe9356cdb05897d9c36799677ae4eb932391b7a9b20f5d494ba5c4d7212. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:35:08Z), 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/QT3FC2541681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b390d062c9066132e2d7a23da962d438dbfa3ad301efa0b5eb6d24ef6bf80a6. 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/QT3FD2588114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc700250083e943f8726f727461da5f3730ca9615dbf39fefc431804d66d60e2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3FE2536612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21a7b5bf3b17b4251741ebdc2022cbb4dd86f142137f078a02d48dbde585772. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3FF2554642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38c65492a8d1ee5e85efaf56f0b5f6d27ac4c6f50ce57b887e5cb0489311ae. 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/QT3FF2557031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ebd2e0e29715c013e4883a60d70681c3363f5cc2ecc11221af988aa72f0f19. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:34Z), 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/QT3FF2557030.