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 0x2d79e3cdb9e1bfe2c4e9c2a8bd5c32b37d363f178274eb5fef443d7752f4b27a. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b850fa1e-0e7d-47bd-bf24-4cf2d3b0b364.json and https://artists.proofprofile.net/proofs/artist/b850fa1e-0e7d-47bd-bf24-4cf2d3b0b364.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 0x122dafd5825b7d1e50fc506446eafb5ad7887121e7320f5aff63e06108129b73. 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/AEA0D1855214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c39bc6ba2674314fe7a67bb84d0df9b0f6ec37aebb3613777842cfaf9977ab. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:18Z), 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/USCGJ2250764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0648a14f6806009de59c1a4927c401b095c3239e4e9113dcad9ae4dedace3c22. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:01:40Z), 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/QZTVM2257066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e9edddaef8546cc4af8598b70b0066dc211c7a8e82e5122173bde7fecf056b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:55Z), 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/AR9NG2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cbceb9d2bf969148267c51ffbbce63c9bd000cc8787705139f3b99d8c6942e. 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/AR9NG2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689b0ba0c2ea1169acedfaa6ffb303976b0b359208bd9d6dbd5901765b0c948c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AROWP2300010.