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 0xafb9691f7d57fb38576e0e2ff270138b57525bfce7a1897c9fdb790e3045e9b4. 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/8a748cc5-3deb-4194-94e7-f24b9b3ba436.json and https://artists.proofprofile.net/proofs/artist/8a748cc5-3deb-4194-94e7-f24b9b3ba436.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 0x5a4499002a23fc96bc9dbe5e5d5615a139c8af7c9400f18f0aabc65e49b36fc7. 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/TCAIB2474943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db6b862392ed8a2372b989365fcf60e5ffd4776c8e73111f0154fceab9c881. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGE2237364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad806b8ba63e84ed8372b7ced5c835d942bfd5effe483d87bd76c06c90f6822. 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/TCAFP2103924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5178e0c407b74dd541d8a09767a701875b563dc2f104736c4cdeb61f13e187c4. 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/TCAES2055717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bb684aa270c6c38d79214669530c61174d068abc9f7fdbe3fc9311388fcc34. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEP2092420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f179228c5f9d182b4f1bf29d3b435c137c050cf690898704ad8b79b50980f4e. 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/TCAEP1919895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd894049d5e9f0d4edd1c6c42846fa90c009339658f75668ea8ecbba51cb14a5a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZZ8A2396653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110a24b52853441e3eb1a8b24e401cee66cf6ea1127ae4ced0ea36498646ff5. 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/QZWDE2353082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22db6d31ee5d13f529460507c51d1505fce484c7eb8a7564710e8de13a4b2e11. 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/QZWDD2384261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51034eb848243b3b1155ed390e3551f6f960ce92ff27e1dfe23c14d0d96ad80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTRX2445261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0207f8cc031623928b5852dd79c7be51a56966d89d9187da9c4d2389fa08a955. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTRX2445265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29780ec3e7600cfe8d401049e6a32cc88c795e3f0838b75b098a809549a783f1. 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/QZTRX2419882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24161a2a5615c706cb23c59606bdcd49048672e382945017791c4817ff9a1ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTRX2445289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d80a17b6135ada3860e4818b370d868a17266b1ceacf98772416acbe3e2d332. 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/QZZEB2398718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75038f8feae15a23eccc117d704ca21e2c3be38eead9dc0a7e5c0177345e2527. 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/QZWDE2201963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75038f8feae15a23eccc117d704ca21e2c3be38eead9dc0a7e5c0177345e2527. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDE2201963.