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 0x18e3f3fc0da5ed9b9c76bfaacefe1bea1b90c6d644c2b32915b5b212bb31145d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91d9aeb0-5754-44bb-b9e6-1a2164827b86.json and https://artists.proofprofile.net/proofs/artist/91d9aeb0-5754-44bb-b9e6-1a2164827b86.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 0x73743a5282f9ad99f98e76840e80bd3a04fcfb290cbdf12fa7fb660fcbec6667. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:38:29Z), 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/ES71G2327090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bd23616052dcf57679ffee43cc86bd1d00283281248e21857d6fc949712e8b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G2327091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc773dd7233cf0215d1e0231e6c4d61b84ede575cce6060348f0bf0d7cdb317ae. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G2327093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69973090f8f2c4f05c1d50d60eb535b579a44a8b3d73efbe806f0dc82637d5c4. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:15:29Z), 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/ES71G2327094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02438f9855770740c25eb1cb62ebdcc6f1159a6b09761c47f3e9acd5642dc3f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES71G2431786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b7f44121b8c17b61d160880865a6f4386eb5c4c3c27f8e231080a2e396adfe. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:36Z), 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/ES71G2503072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900cec580452d0b9b8475ca3345b9740735bd627f050155a13709d5393997655. 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/QMFME2524330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cbe8468a0ea011689d732778a0c25237dac924d84caa7026d9e43285be0984. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2339078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821d0ddff446d5f2b38ff60d63dfc76edf9ecdd3349574af93dc8fdc96628eba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2339080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eca125ea88e15fc8f27c1f998aea2945bdcd09081a3b24c424ae492b774811f. 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/ES71G2232031.