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 0x30c66eccc3c27da2a5d342406f3f96ab77f1fdf3ca61a5678d82b3f74422e3c1. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0bb92ec-4a2a-4dac-b039-89723911b339.json and https://artists.proofprofile.net/proofs/artist/c0bb92ec-4a2a-4dac-b039-89723911b339.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 0x12facc183bab6ea6ca0391a7ad9dedb09997ac4b4514b50820107f081c21fcae. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB72401888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6dc286cda8c6f553f6a5f2383b8ec45a30166c3a93bf53f1206aa8b9ad1c35. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB72401889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58feddd1495846daf97263c8ad2b927364869c53359ca6e9d6f5ec3bc8e4fba4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB72401890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be11cf2a6c982c38765476bb513871aa9ce8c349e0b57d6878a1fd0a66454a3. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZTB72401891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172ff83e30660ce054cf4abc3b1e7b519d4c1611a32a26b167022c792bae3db. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:27Z), 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/QZTB72401892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e841ad5c2cac9dbe6c8236a32a4913753865d2da557a0fbce6714d32de4eae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:48Z), 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/QZTB72401893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec680e9a9387735758b7dcdc24eee04fa5c0a0536fb2071cabf61954a2f11c02. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:42Z), 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/QZTB72401894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb651f67ec3a3f924821110ad4eaa75a1ff12270fe5f78edb4e169eb702cb0ea1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZTB72401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811bf087a29061f0ce59cc72f6623c33f60b1f880442b85e70e9c132f66701b7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:03:08Z), 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/QZTB72401896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7517c910b0b06e660b28bce5715469acf4d7d6be21de5c2cdd0d1a9b414163. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZFZ42549077.