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 0xcd64953467fc1b4cc93a3449991580fb3b543ce25a18444a869730667bb5ed90. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11bc4c93-f33b-48f2-8cdb-ad5261080499.json and https://artists.proofprofile.net/proofs/artist/11bc4c93-f33b-48f2-8cdb-ad5261080499.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 0x3f8408ebb874d3dc45258502e583a4ee76f65a8cbacd86605bd58dea6078a889. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:53Z), 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/SE6XY2582881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf387f6ade2e7aa886b5185a78051cb5c7ac35116736b424ccb11dbecfdb7b7ca. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:50:24Z), 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/SE6XY2582883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b84ef36890c48805cd0ac53cc1f4d6e32f925a32bacf0ddc690bd8fed790ae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XY2582885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bed710fa4467b8cf4635e4294efd024c07596c8cfd28f6b73d4b0b2880d9bb6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:22Z), 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/SE6XY2582886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6c7616f1fb9d0b40d23897e0bf1a7874aa2934ed8ea3a95fcf30709441659. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6XY2582887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94151214feb6af896588ee30cbc9ff68afa26152504d2348f93a9aea4cdcc5a1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XY2582888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f59d2ddde9fef81677f9fb260491d1478653dfc9ca6c022f638b3df3412102. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6XY2582889.