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 0xf02c3b43cdaada9307386e3bd1de19669f36839daf893a656efa74cb109ee9b0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18c90e8d-eb30-4148-b722-30226d89cbcb.json and https://artists.proofprofile.net/proofs/artist/18c90e8d-eb30-4148-b722-30226d89cbcb.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 0x3d43905f37d09ff526d32f9f51683eb5301f534e42cef8fff89e0438b64f5782. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NL1AP1935405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5331cd0496cdb77cfbaf6a366500bea01028a69e884528ac93f5b9425c6270. 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/NL1AP1955699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4b64b8849488a625c52a4678ca9e27b115d06e9f10f8749f56d81abe1629c1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL1AP1966809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a46548c63e5c169a8ac8c309c3386b25642f5e9d1d47a8ec5a116f00d7b4e86. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NL1AP1984372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe733012100764a21423de3719c7ceea8efe09787c0b7f74b0924663e625bb184. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NL1AP2004380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f2739a86b69f38aff406ea6bfbbc8d81547e93740ff1917af19d54218db61b. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:27:54Z), 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/FRX851901854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506b72e3e2cbb271550fe88de506c810d48a0fe80ce2fc1f81461a9d2b6cbe5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FRX851901877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34e8ce5f09942a662cb09eb482c41839ee934f09bf83f9ae7565aac20f8f1c7. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/FRX851901893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e307a032a9208b2339aafdfa4632435a355e503cd9892909a6dca7ca857ab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX851901889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69965d803f6f2133f9f67de6d97bdd3df3909d1eb634630285bbb986b333738f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCAFG2066042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d1b79a2ac28fbc98869d86814bad370968153f82cf8bf04a660361b832e22a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR59R2144421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a894e13dedf9add5e48acecf90c6f98842a1c7087fd04fbf374da77d52684c8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR10S2223213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d5060f3aead2cab0471c3ec1c055dd76160fffb504cb8bf787421be5ca500f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR2X42272747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c775fda800d5e1814ed1b2b5f191d05ff4a6934305f1c133d232895cc442cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX202215049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd080ab2a6252bc8f5f41c42f145729ae861cff9e1baa4e10fc9958f3325d9b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECE72003577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea2649e3ad341679e4469755779f28c9484c0e97d6f0d2495368884276fb3a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48302460b78474e390664e992926e28f1a46f094420a16a33387af1120461fc4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEVY22100037.