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 0x8fd0d561893c8607a9caaa9d2bcc04447038a468252d7fca0e9490cff30288a1. 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/a2f54e2a-11ff-48ae-b1b7-42f29740fbb5.json and https://artists.proofprofile.net/proofs/artist/a2f54e2a-11ff-48ae-b1b7-42f29740fbb5.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 0x8c1e34fe29977989c5fd7c451f3a9eb840890dd97f6228b4295be353316c4f67. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGH1868978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30014a516999c9b544bb615ab21e32192b3ca0d97e91768849258c504923c07f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:07:46Z), 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/TCAFB2061191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590ca490b42c8fc7b6ff5201e85e91ac6132ba76678f0919d46048b26620b830. 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/QZHNB2256644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84fbda84fd23f3f647e22900acca882c6f446d483c70f0b7ab4c0d0174077fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USUYG1344262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a2766965bc8928613599ab9d8f504be709b73b2dae049effd86d1fc4cdcf30. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USCGH2114968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110a5955fac2802122151c926c8a95cb1a15fd774c5dcc508a410dd5059db08. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92229301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871209670f39746fcf768fcb50b3e093f13063c999e3e9104e5db01274543671. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZHN92229303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966526af6f09e24c67bd2b6c84d1601f918161ec81384c2aa306deb22c981115. 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/QZHNA2303435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e434e001f02d9a6305e7bbd03c340883caa62252e7ef814e7c060e75325c54. 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/AEA142301242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b823aa0b936c3bd6be410eacc65ed1a991712633380b8d595317c16b20517df. 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/USL4Q2392039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be706edb81456ba04964cdea3b54a3534859f1a84f7a56f800c2c123fe0ba58. 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/AEA142400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706872c68d6d8210c0ee6f65826ca2d13841ffceb9003005f791a0aad6f7e470. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USCGJ2498305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad73f1cd7d788a0aa6b8a585729684446c5add21f6210e50ea387baecfc50e. 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/USHM82402582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95721dcaf1cd961b554607bb07ac3f065be5f787aa2cd2d21ec78904b13d9b1. 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/USL4R2432088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7b94b941a0323ffdd5874fbea134c39d9d9ac6d20737bfdcefed4335b8139. 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/QZWDW2464865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5345c7b59f188861676364f54f08cc08cefe2f3a4d47940e8c064a09449c04e7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USDY42539839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b924c68ae319c3514d4aa5efee5e547aa76c3f568666f8847c73a789ebc660. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USHM92567315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155fac9299adc6ea0c13d48d19c4cc0154c15b738d1b8f346f5ad984f5078a3d. 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/GBSMU8515702.