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 0x787ab31dd859efdb90262985378145ebcd5bee428a3ac0acebb7df4cf2c400f7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7ddd28d-9d15-4f35-9483-7570378ec656.json and https://artists.proofprofile.net/proofs/artist/d7ddd28d-9d15-4f35-9483-7570378ec656.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 0x084d8ea6c0a2bfecdec48639e2b455fe916dab7bf3dada09f0cb9065ea2bcf45. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USASN1402501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e21548d3fd17bf89f3fde4e22035c4f3a63b05b37d298b4e38aaf3b153b5a6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:51Z), 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/USASN1402503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c36b80ca036b15c26165b503716f08217a7a769914c33aca5a51968e5e0984. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USASN1402504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51edc8474505f8e8a2e699c34c2510d478dab51d7d7e47e6f31fa25e82a90761. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USASN1402505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abef8d614308321ad2eaa113b4c013fe1f62901c8b3390292cb66fdb3c7dee2. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/USASN1402506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d6751dd8b550cf57719446243bba8dc7f92eadcfb4a11a9536fdeca16c729. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USASN1402510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5542a4b0f0ba33d67002c063b11a35d049cfab91e99665faa649e7c46d34b832. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:44:01Z), 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/USASN1402513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da404cc36a8aa31768ab7f094a9fb812e611efd84f6765356cb62a1029661e7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USASN1402515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31834989855913790c98dd9ec27e622d4d0892b49e3065b440fbeb88833e7e78. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:23:39Z), 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/USASN1403115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09f0f75b6ca50fba0ea350307af30c0faae7d6311d138837afe70ce2c5d860b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:34:07Z), 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/USASN1403116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d2712b9373c9ab8f3db4be5c5446f29e24289765342db16b47650a4c411940. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USASN1403117.