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 0x2720483e95f53610bf98829dab883c37fe905ba6174a511229a5009d57408321. 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/6e56e17a-a99a-49b6-97d2-49143ab06342.json and https://artists.proofprofile.net/proofs/artist/6e56e17a-a99a-49b6-97d2-49143ab06342.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 0x8540e6a59cc26aafd83f1c0da28edb3ab3095d7db9c39d92488c891c93b9626b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEA371901130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3438aaf94630eea4868be91020b173207b5a921e9a1a0db467d60bc8bd63407b. 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/DEA371901129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3617b63ed7c2bcc1a43818881e76e49512fa40236eaf9e3f5dca39dfab8ccf72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEA371901135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d2401f3781345a31b2a57d9aa071007fb3ba1b93bea23a7e6397807d64970d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:42:58Z), 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/DEA371900878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51228e26e375077675d8fa88fb71d7ca5e73eea6ce9745014fdf2b34dce636a. 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/DEA372010367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6eddcf55815e6f7e752fcb8ddce54a678413216df28bf122be08b83a8a226d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEA372011339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3dd8e95876000bd8b8315cef336de04cd743155d3832774dea6d88c958f597. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/EEUL32205726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf776d1e4cee5f7523eb544b45e24bda0ef5c1474dd08d3b72ba92060135b9f9a. 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/EEUL32205979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8324b9e8a7eb27a94a6149ab1dadf3324d711a5d33f0eed413e77942855ea666. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/EEUL32206416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77f45d3ab79e94bd0f044a43e8d230ceca68570b19a93be9d9082a98631891a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/EEUL32209694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20167ff2df0f78753d55813c86617131fa24fed94f2c4e6d8a7259eac15bac2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/EEUL32402395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231a72a2b89d8c757f5fca69b2ff7e681f1e20afe92a65470c996d7c36316c7c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/EEUL32404042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde53f89a672b36d0c63d1c03216f9f049aad2fa80d96caab621f282322f95d7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/EEUL32404049.