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 0xe7ca44aef581b415323f73683006edef05c0e43fca319cdad1727a1d07e50f99. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcf38abc-3ba2-49fb-8ff0-c898df965676.json and https://artists.proofprofile.net/proofs/artist/fcf38abc-3ba2-49fb-8ff0-c898df965676.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 0x23c5bbf450781385abadb3c7c4c497ad41d9d6e10199685a529fac16e7432d91. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:06Z), 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/QZVR42300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a636ef2b492ae844f7c8512a140b487b62b806b84ee561f1eff1ffeb2e1b5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUXN22414603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c835a8ad1564b77afa1e89059bfd27f6241d5a488f21bcc41b8557cccd83bf1. 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/GBKQU2470791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf083597d121f5a99b59685feeee396f133046f49d02c23d8d8d40c35578625d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2470790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c835a8ad1564b77afa1e89059bfd27f6241d5a488f21bcc41b8557cccd83bf1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2470791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1726580e89903c35160b13fc3ccf3c4819af2f6d069abadc0cf934aa57d10ad3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:57Z), 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/GBKQU2521908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a303ba22e235b461f0019f3377cbbe8f171b9cbb10b626d0a3e5093c3b0041. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXBNP2504892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c267917be48dadff8b748cf9cb9dde333f9400d42b67dc4a74a9c39f36cf3f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GBKQU2519511.