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 0x2401171c4387d8a2a6f881d0dcd85bf36ff689b573ea5659f58e65e8c3f79572. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73d2c036-6dd3-4778-a51c-d79ca687caff.json and https://artists.proofprofile.net/proofs/artist/73d2c036-6dd3-4778-a51c-d79ca687caff.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 0x9ad7253b0f2fe673d186419c8e0bef66af30068ba18a35b74695dcdf30e72c2f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAI370561932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b96f34835d6e2544653cff5819c3077d8696b7febb9b2a58e0f7e0e88d79c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:29:59Z), 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/CAI370575148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66f8baec58a7ac4512346b91a0dbb6f25dbb3e31a894cbe0e67fc86531cbe6a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CAI370575156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5b8d668e94fc471e471f7033cc32b63f98c6bb125078e0168ab4d1d231b498. 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/CAI371718954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7327d9ce133bcfa482a64a7d4234141782720c9aec25c5d855901fbb093d44ec. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/CAI371718967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7327d9ce133bcfa482a64a7d4234141782720c9aec25c5d855901fbb093d44ec. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CAI371718967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84371b22905c9f3ede8e9b338b5ae41459f0c50c2d79a213c27e080304d7257e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:27:16Z), 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/CAI372500592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de069441e5d75d496293528e242ab996bfe0f805814f9bd9b89cc68655cf810. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CAI372500755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf999a13b7e0674c53c0927ea9ffdd5a3d98762a0c0870d95b57bd2cfb6301600. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAI372500764.