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 0xe850d697cadcd3d33d6aaee83936a0d1dad817c661a4fead96e05038e3b626d9. 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/31725d12-68d5-4dcc-9488-27672e2eb35f.json and https://artists.proofprofile.net/proofs/artist/31725d12-68d5-4dcc-9488-27672e2eb35f.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 0xab8670911e5bf8835d5086e84c3fc300f31168789e73d1af653d24e9351ee04f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:31Z), 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/TCACR1602741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d677e7d6c1963206dea74c98e8761f9452081d0c3769ae6955791cf77842bbe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:26Z), 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/TCADC1711416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639d1144a307b33cb3ae4277953de7213f095228157c18bd39dffb571fe21a38. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:07Z), 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/SGB502107525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd868398e554bccb5527ad05d13ab854811fbda8c909a7b56c1760c607bd411. 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/SGB502249342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48a5fb54ccdf9fa12bef5cbcf02efda269a319f58a75794ae8f30521b0324fd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SGB502249440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34aaea80962c4514505be375dabbee5f1e8aeaf2fbdca2aae47d73050600fa9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTLA2302558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb68aa3176dca4d2f7bae5d345103f18a58324bff82fe68e61b64ef4276494c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTLA2336958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04b85040b788e724ed08e275bf0120947e5fd95268aba7660dba67f54e4bd8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTLA2314967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecea4bdd199068e9107ab457aea23e51176a9cbd825b2afe0d5a402ead51001a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZSYP2374409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba891faf75622f07b5bd23dba79e8694613285768a16839c808d75dfc1e5b9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZSYP2359337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1de392ce30c357318b06728aab700e6df9bc1af31a382103fcea7782f2bc64. 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/QZSYP2376585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bcb790f509ed831074c6952271d9a1cdc8bede8532e45c8daca0f21e04e0a9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZSYP2304354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6458a8087f2ef208326903a92fb681ea4d733d8c1f797a18fa408c59acc62f5f. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZSYP2333542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0841e09625c15aecd15fafcec88ef725731581b3c6db01d66814caa96f53f89. 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/QZSYP2527466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb296f1bceb07e32624898c6d68533264dcf2b4b46171fb19dd1495a6728b5f35. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZSYP2530076.
Voices (feat. Cassie Marin) (Rerecorded Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711dbb24ff77ac1b2fd3c38613d14ebdb25f66c04050562a072d450ec626c4bf. 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/USEK71322416.