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 0x903261d214f6a221326b5a4f342bada9ccfa8e8aa41d6f64de350236f2d882ae. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b93fe1a-e86d-42cd-8b6b-eb164610f0f9.json and https://artists.proofprofile.net/proofs/artist/1b93fe1a-e86d-42cd-8b6b-eb164610f0f9.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 0x8662eca94bfda118033722385af09780f80d42ab2ca2f895273885fe1118838e. 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/USL4Q2019280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f61740a106ab25602db057fa8d15c651e7b6897d9cf28607de12c164064860. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USCGH2161890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0295fcf43e91e324cf17c10c2c39b85ec9524e73c04d27ffcd0898e76a69fae9. 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/USHM82154878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257b7d0cad0a0114543a456ca3c91d2c32397eb7dba7577691b0928646f685e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:03Z), 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/USHM82154879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bfb559b4848f016ba2a53912005cccabd46311f5a0fb8527bd1fbecd6bc853. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM82154880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf547261801d4c96ca56c864b4b5b0843849fc1e3c3ed5d9ff6c4047a1d083. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES64E2307484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d59979bc7756082adefbf69dc89910d5d9eb9955f0fb39830f74ff56270b5d7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES64E2482526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73268fe601835110b54d48121ad7f4d321f651f6cc02d3f983912f00c49cfe. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES64E2506689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0735b97b84bfd29bb507c04432f2c924b8952fb8cdb9e34b6071d78c01850ecb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES64E2507235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3006ab853a287046c2465f54f5ad75bb09fb2daad10ab3e523a11524b114c538. 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/ES64E2509332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cdadf9552f5df3d2c651af3d33b646b8e1c2a8844ac6183800215471659d51. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES64E2514954.