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 0x4164b213d08af27eeb70c3e708594d1e9ac633cfb055a0487a1e163f912030dd. 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/521024e5-fb5f-4dfa-aa7d-4c8d4278c1dc.json and https://artists.proofprofile.net/proofs/artist/521024e5-fb5f-4dfa-aa7d-4c8d4278c1dc.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 0x8e00017b87b68584e1cece8523f767975f50e527cb1887f923655153139dceec. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:19Z), 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/QZHN91911150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e77787ab43db7f1a579ce26108be570847b6e539f0906b9f7b9c625c6805e1. 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/QZFZ62155026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ef97c499fb8e0039fd2c9a7e766b0ea91833016f029f6d30bf3d1dcf9c877d. 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/QZFZ72139620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f36d771052dffffbce31ddaba083a7273029ea28b3ecf841f8a75fba610550c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES82146524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94c544a849f1c3490f33fc5f687a2c33c53d822824fbf9c68630bb3dea4f767. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN52136168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61206e99f7a465b8e21244665f794c25740f52d5e5c3e1268a56493cbca3ae88. 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/QZK6N2275676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea731d9ba743357aedd30bfcb290514fa003fafb307b667070e0660d3aac9ae. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:24Z), 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/QZTB42252536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6f021544525db80d9c3f24b134eaf3a224dafc83a78dabb9449504462bb48. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZES52307960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2142c42e1358698f9d6d7f286cfe19c5d6bece40e724bf683e0651e7298370a5. 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/QZNWR2319125.