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 0xdc38011c9d2ab937684c8994bd979a6de550380f798701975d77f6e2dfba64d9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dee1bbf5-2bea-4c6e-b252-c407ba609f16.json and https://artists.proofprofile.net/proofs/artist/dee1bbf5-2bea-4c6e-b252-c407ba609f16.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 0xeb8dd2eae42f179c5362f9b4b0e036d12c70083078eec755ca929764be935c4d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/EGA252011425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8ff3818d5c2bfd21943318fe1d5143a8741551be27e33d5286c21b011812e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/EGA252301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee24a0affbe6dadd81788ecfe2e79f629cf1a8c5479c8d8d8ba1be507f355aae. 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/EGA252301114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95081de4f1c281c1529f2b64d83017db9aafcf2dd7ae86c13651f688be6e7808. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/EGA252301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6733517907a3d794fd7141d328187d5cdb8c209d3fbe77739ff160d9ac0d722d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/EGA252308492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678cd7927e7f71eac5f09813508a15bffa41c01840e6e68dcb4902b35ad6d1c4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/EGA252308491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf50e84178647734b1e3acd21af6eeba275604ca49dc276bfcd548ee9d6210. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/EGA252308490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8210f7f768728d3b8e02180061e333f21cbb831451f32fac096a2f149ed4e314. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:37:59Z), 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/EGA252309019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055048c900ff3675d6e53257c8682d4f9900ca130d112f81e1d9488ec0f6008f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:05:43Z), 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/EGA252310722.