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 0xa9da6c885842ece7ea3ed2b7b93657fc540fc111be0289f61e2748fb64e19b91. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e55de83-ed0d-4a3d-a297-e660a68208cf.json and https://artists.proofprofile.net/proofs/artist/9e55de83-ed0d-4a3d-a297-e660a68208cf.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 0x1662c11dd2acad85835306c36123790be8e576d966a4502ff7c4bc306437ea58. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBL5J1600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2172e0bf315b4141e228ce26491ea0ea6a713aa128c3cff67b1e8b9e7d4b5b8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:49Z), 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/GBL5J1600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31baf5ac83aa806a9d2044cdbd555f07ceaa387b3d10915715b78cb3aafceaaa. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBL5J1600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00603f8a783c1dd03fe1f64760d2bb470be4479a3924bed583c148be774b1583. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBL5J1800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d493ae48b405ee3d79d0c775636d6acecaa2b5b13fa8ec7f408c5f6a809a970. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBL5J1800190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e42eeabe33a844d9dd7d24c1be2b0a0d2b6447d809e0194373f17a5744da1b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBL5J1800191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9c034f9f5b737553d6bbab9c6cccb952c0cedbebce89872ca7ec3873fd6f3d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBL5J2300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f63dcc0e9c02c8d39d6e283cb247c1174605519aed62dd4dd0893ae0790bdf. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:20:01Z), 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/GBL5J2300325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3687658561a76ae861a155aabbd65e3499d21c2089910b0ab3701d56bc491c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBL5J2300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c22e3477ae4bc98eaf8ae8e12647343f1ee746196964a41cc54e1c39ec597d. 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/GBL5J2300328.