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 0x581cb36cbc824e6d58ccd312c599cd767a9125ae6bd735f56deb28e56f9cc701. 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/f90c4005-264c-4b8f-837d-d0eb4264e2b4.json and https://artists.proofprofile.net/proofs/artist/f90c4005-264c-4b8f-837d-d0eb4264e2b4.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 0x183fe0919b5f03f748e6068cd01ddb43af69820c6275e3e398f41026f4c8236d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:02Z), 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/FR9W12023552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9344cbfb52435a635d343ee4d17527a742e11c608cebf897c7754230082ec16d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR9W12031073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e6aea55ab1846e68ba60ec9e58dace69f75dbab5df227ab0d95f3d2ccd5017. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:57:48Z), 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/FR9W12035308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fde2f223bf6fe6af5a05c829fc84e81dc873fb1345f4984aef35c129511f12. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12204454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612991a9906a8d004127bf210993fd0e5e863cd5f7892812de2f32028cff9586. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:22:35Z), 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/FR9W12208360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c2842ed603fe1b14303b81788d3a5e77272927dff7f6fb3ef9a4577256ae42. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FR9W12208841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f225844edf3dbea8b588403f41b5a5da2404d5555cbc2edee2a15efbc34f0. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR9W12209231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d050d3b2e8aef03366f9ae386ec12c56dddedc9eec8a2968e151f1c0520c36a. 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/FR9W12208836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814eb3426c69bb4859d1ce3f9cfc33dc3c994b0ff8abe2aa97a7ecfab6b6a5c8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR9W12208837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e3fe57116fd660552385a361a016be602e48e7e55c6aa42a67a2433088382. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W12208842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9cb0580b07a0ce023a8655622cdbb1066e99285fbc308562dac594203267e7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W12208843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a11887ca18124b2c95e4c78c3f3a5196e05a6d893f8fba8c431d747f1c1187. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:39:29Z), 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/FR9W12208834.