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 0x513b2f03df85299b16880b0ce0ff324fd831db2bb656d33deb13bfebf5bcf4a8. 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/4fa453e7-a4d0-4dc0-b9ab-56a34ca7af73.json and https://artists.proofprofile.net/proofs/artist/4fa453e7-a4d0-4dc0-b9ab-56a34ca7af73.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 0x487f3d8dd7187083f5900f17f294eeb9fabd679e06d7c341151e1e66b3ddf84d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:15Z), 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/QZTB62247233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf420c7909e4a38fc0ebfd02b58b4b051152794e353b42b32605cfe827778a36e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62247235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b9cf44c25164eca97ffd3f7a904c371e931501d184221e4c42b763989057d7. 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/QZHN82430927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bd6b6edfe2ac3fb1415fea203f45b4f435f0121fbb0732d68e7bcf913a49db. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN82430926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845746bcbafc4edf7e1bd64b1a76ee7eb4aff2d69d32e1a7653bb8eb2f25465. 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/QZES62494319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b10fc0ef66efa7c5371a427547b500ed8eace2640e0585b84e9d1f4c0d48e69. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN82430928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795ade4a455c5e8a2e5b5b248215dd668fb420236a360808181a568440c9240e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:31Z), 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/QZES82497130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2d65b7e14311cf895980b72dc13b717ad336dfd8c1c5dab2c7a782c3e6a787. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBF2477602.