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 0xd5798c797d96e9bbb8fc6e0cf7c7a6d17880f837ab6184d39d946aa4eabb4cc8. 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/f14c2d45-d85a-4e06-85f7-83b22b66c68f.json and https://artists.proofprofile.net/proofs/artist/f14c2d45-d85a-4e06-85f7-83b22b66c68f.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 0x1db6ea7c7dac21952923cf660c90518a5e4f6bda0179749abde22d4b8eb1605b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/AUBEC1814632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b2a591c7947b3072b2760baab89ef08c3e3c3150c55bef1c89d316183734d9. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:06:40Z), 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/FR10S1951060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aeb9fa99938dea5cb1d4d5e29f22dc4fafeacf8b814c064c7f053977d3561f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:40:25Z), 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/AUVWE2301326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3279a98caf004f72bc10dfeb8556955f5273b3ecfe72fa9999f9874aaa92a7a. 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/AUVWE2301327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59812cf8b852dcd37c78cf134c02156e2b788ebec48def10e87171b3af495c11. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/AUVWE2401357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f9b684eb9da007d07231bfa96a5d7dafc9cac176e83d5cdfbaad4aba69e003. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUVWE2401358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1bc2db646ab5e0467e6db686d731a316e794fd8faa943d7f1e09538e28d3eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEVF11900872.