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 0x2b6573ab8f2a8a2c5b67e6a967a3e1c996353ede703829c77c8f2cd94f069834. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d515a951-f37a-454b-96f1-0174bb16eb48.json and https://artists.proofprofile.net/proofs/artist/d515a951-f37a-454b-96f1-0174bb16eb48.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 0x2d101fb8a022b3fe81bdc6f0227cf0037d290e824d96ce31ff873bdc03122a48. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAT2530133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf66c07a9be4e5878f82bd4f5ee792cc8e7e2535f1616e89c4effa4b49611a47. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTAX2581327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8565f05ca5ea3dae148d3276051f41c53ddd9b2904ad4be8b95a86e60d225671. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAX2581328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f71d40ec467c4f8ed632c2640beab4ad6b18715d9b219640e568dc823e9d313. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:17Z), 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/QZFYX2560946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc66c6608a38d9bb5f65fffa31a295bb5afb1698c1c2c50ec715256648191e6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEP2538104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30dff76164c67227e50cb34d33ab0f5b67051f6f610e37e2a0f35cf232ee72e. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZTAX2581329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d101fb8a022b3fe81bdc6f0227cf0037d290e824d96ce31ff873bdc03122a48. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:57Z), 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/QZTAT2530133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fbe280a5ab1d92ea2e98ad27ad38827c867bd4bf28768c7b2faaaf8d0a56f5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWR2564024.