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 0xf50896eee744a0cb9de5c57c82a1ed443d68fcd441d7e3ca52234583d9a15ee8. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb9a78e9-8cae-4da0-ba27-ffabce59c4a2.json and https://artists.proofprofile.net/proofs/artist/fb9a78e9-8cae-4da0-ba27-ffabce59c4a2.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 0x51e2a29d471bda21490d04053e468c5d6413f34daf3afbd0a9bf4a38ff2b6349. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:07:41Z), 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/USL4Q1894020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d255c2e08ae017942342daa074bd74d643e22455f3370a0947f255888e1471. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:12:02Z), 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/USL4Q1894021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce23dbda87b777e4433db17a8b4f53279c5715c05d5366b96b1749bb669a19. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q1894022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed09e2082409133e2c92f044e577b10a863b1dbdc82cccdf2c85c900fc005db9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4Q1894024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282e34d772aa91afd6d850d2fa3cc77f04c522349a645dd71ac8ffc76625a24. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:21Z), 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/USL4R2407411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e15605a31339dcaa5b21e9963757f8ff695a680c2d6331bdd8c35dd0849a450. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USMH92312833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc46ec632b89e9b49db09b5d74844ef74a5ef60ec58d809ab56fc22bfdab060. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH2475351.