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 0x2ed4f0060a379cd72d9d6aed6221d3cdc090a71998771525a91725396b610f96. 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/13199e60-1341-4dee-a992-dad868ccd550.json and https://artists.proofprofile.net/proofs/artist/13199e60-1341-4dee-a992-dad868ccd550.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 0x372ad161fc7faa22fcd336012996b672e2062bba23c8aa0a6d00d877a4631a19. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USP3J0804574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1345d722fbc87dceb38be0ed2c7cc5303261a61a627cbca3e456d3d149e8b22. 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/USP3J0804576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8d0d078c556be90daf6809915e6ba73fa14a655d618b135bb31bc379034d16. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:04Z), 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/USP3J0803396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8bc1c45963f43989c16d274c91d0a0eee6be0d0bc33a2d62edf46db31cb341. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:38:51Z), 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/USP3J0904839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2c2ac5350eee1faf038286585822cb93107a403e73d2b237a03167ad525b0e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USP3J0904840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7043b9b7d7cab5fcab4810cc022bc8f9f437ce406d7d13d3c486cbe51684e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USP3J0904842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f99bd9d169405802841c787b0a55f093ac76c8e1c31ea5c2e5b484fb87e0cc. 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/USP3J0904846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d4c2fc19b6971704a28b79eb041a08ae4f7f62ff171da7ed15089f83b20f7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USP3J0904848.