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 0x8a209884b86cadd293cd34aab8d5101485cad385afa9a122b1e9de2d46f1923f. 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/624674fc-c38d-49bd-837d-f9742fe7a8ab.json and https://artists.proofprofile.net/proofs/artist/624674fc-c38d-49bd-837d-f9742fe7a8ab.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 0xfabd5519740e976b184b72564b82658c18dc837292c3c2953559862160e1f39a. 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/USJ3V1894365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7e0c3ff0cdc3cac39307e7c94e04b45b44471145fc841e6912e6eb0589f45b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USJ3V1894370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0acf26fdf47161ce12882aa9f36df81ba84a5020ab4694980039da1e7fbaca. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:49Z), 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/USJ3V1894373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c87a377796d9c65bfdb8092e4a24b4ddec1ac49c33ea57bb05b3d745bff1ff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJ3V1894378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f557299810ab7e855e015b4907c950452c14fe0dd0e6d293ce1d90aca19d9f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:36Z), 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/USJ3V1894379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc852a5d6563e884bb3f09d25867e1a105e648acbd782e65694c8f1f89cbbb95. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/USJ3V1894380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28a3ea1b8c08cc9e4c1f21effaa27a9b3ad7a83783baa560dcd94ce1e5d878e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USJ3V1894383.
La Pollera Colorá / Yo Me Llamo Cumbia / La Guaneña - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5f1dfba8bddb786711614eba020f8950f30b9133aa929afc21f1152e7aecfe. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZ5AB2399470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53491e0164c757b536e0ee8c8744666280a539f6a7ad527364f21774c1a9899. 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/QZ5AB2399471.