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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e922b7c4c81889c6e87432de69deb32b3ea1586d9735416e58a44e31fe13c3. 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/53ee0c43-4b15-4d1d-9316-f661c1363cae.json and https://artists.proofprofile.net/proofs/artist/53ee0c43-4b15-4d1d-9316-f661c1363cae.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0147c4fa74f2229719427e9734baf4014d805f27fb2758e70dabc8ead8d7cfc6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR6V80511321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9499e8595e243a236bbd2d245f46d8abe67d2ff2e080d278eff62ae2aced4abe. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR6V80511322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddb55c541acc84ce3dc9a80a7a26c940419f8a257ba4c511b7ff5b3ed94204b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FR6V80511324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859bef48870041a2fa59feed302aac285f650c8d2fa61238594179c0658135bb. 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/FR6V80511326.
Rock 'N' Roll & UFOs Gregg Kofi Brown Anthology.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847a80f67c4c7248488a3afaa0c755f9c857836b817a52a9166bcc5e276223d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X41654860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af4c3414ac4d654d44c741bd8a301f473c09bca5d1d864a10252d7e57bab53. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2X41654863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d46c863cc4ee1021cc1e93adfcddb64d77cb57de5a0c8d36abe163871206358. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITD561100419.
Drum'n Voice, Vols. 1, 2, 3 & 4 (The Complete Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dacc0d55c34b559040305cd3b7211b803edf3db0c5ade474dcac66ab4f2729b. 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/FRX761516763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7021e835664d4ac10b161efcdf55fa3bd6e1c22f7dcabfa00557e86e709e8c7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX761516766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d4d9df7a6ddf16dc3e442c063ff9e4bd086b576d99ce2e8a68f9e585ed1fce. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR2X41654866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7107f3cc78365aa0d911bf39201dec08b072fa8fcd66c39d3d2f24cc93279c7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITD560202620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc705c31183bf5937721736929d9d3a87ebe93bffb831a396886c919593e94214. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ITD560202651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb847972e7c5a088e9f9d45c457ccda0004717bc5d2d1fab61f59f0abe06542. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR6V81735084.