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 0x261571cfe29f3f529d9e868884aa751153a30d330b40f59bc93927a6de3fa4f0. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c88afd0-a184-4197-a2f1-4c3f5f7d0cb8.json and https://artists.proofprofile.net/proofs/artist/1c88afd0-a184-4197-a2f1-4c3f5f7d0cb8.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 0x134b923e1f95eb78f43cfba932c3c6b20e7ba1437e56053a27cec95d295b2f6a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BX5673785555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83248b551ff0a8c2605c3e9676b4728264884241e9126534d592b0eaa9a055b4. 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/BC5644664466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b7dd1cf707e80a26fa397494af2c6b7fcd432e7242d4f1723b379d56de2f18. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BCDYE5677833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9af89c42ea3fda14cff8841b1e1c9048cc247224b1ae176bc0797a57be4dc6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:13Z), 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/BX7589393774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a28cd74b20341c9b395c5f49bdf26b28b253839852218e25ce838f1ac97539. 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/BKWKS2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff72d239f32cc33d45320e842d0f0204cab19b5192579bd1e61aa325c6679e62. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/BXTEY6784783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227911a7f8d8e79394fee9ea5ced50d8a9ea1413d8e85d64e2a38a021bd9c1cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/BKWKS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d9f2f0a928ca604b1502a8f44f2990db832eb724f4271c4bb3eafaaaf81b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT5M52544403.