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 0x685c64c64ed9aa45d259e83c51fcd767b487635051a56ee28957d30e18055329. 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/9a2e489c-ea07-47dd-8551-249d5649177e.json and https://artists.proofprofile.net/proofs/artist/9a2e489c-ea07-47dd-8551-249d5649177e.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 0x9dd943dd70bcc62b526d15e3b57a39f0b2b7419eb3222f4e26a760754df53782. 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/USUYG1121217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8136216d6e7b59e8140cb5c1b7fbd1851dea10b3bcaf5c6ef306e978ad40814d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USUM71700834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1b0c5bdb067d1e47fd900ceb8535de8e8a72c6e542fbb4428ec6880d75c8c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71803873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb215a00df1ae0ce26c40f8063d86ef6a4a586ee291fef200cc4b141e11a18e. 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/USUV71801113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258cb8e0fa0e9960e6ac7d213ddde841683adf9b45eb99f8727e9a77772de272. 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/USUM71812576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4cf6fd14c14b5b639427675c84e1055b7d32ff26155441cd020a1bd0a31020. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM71907876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8265826ad2cd5c60c47d6df2a3e8a9e01318018637427350db87978f312f1150. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:55:36Z), 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/USUM71921711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfdef57c09692ae429e6398a64e343dc655a15d249b45fda16eb384a4aad174. 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/USUM72011398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455b0404b9337b2847c17462df836b31bc1caac7ecc0d8017750d17808e042dd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:12Z), 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/USUM72017138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3cc6ea6144bfeadf38744524a3721af41889900d3607a787666a882eb50d5f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USUM72020454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f65232d14ba437145b0fd150b76b690d1b754779b79b4b8385dc9642968664. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72022549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f58644361d9fb9fe91ff5977ab09ecd7a7b9577dd26a7514101248a0c1cba7. 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/USUM72101111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea69aa91fac33c5fbee42c7ee0fada07ff825693f3f7c44ce9db65962cc377. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/USUM72111313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947507e7057a6424eb8859c89e5e5b0054023db43799520d841041fb1843de5f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAGK2270127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e81874e57c83398a058541958bc006065d477601e7c5010a8c065887b2ea245. 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/US7VG2316622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714bca36db20abc9abd341318e1952b568b0add3743280d3efa6d752663537e7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJZ2342464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154949154c60ef8ea52b5f95f8575e105ab4fcebfb975c554c29f1fd1f612ec8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:21:10Z), 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/US7VG2457372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7e7cc697af31858955c75bc29cc4d444625f8b8abcbc319e9a2c21203f8f0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CLPP22400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1b0c5bdb067d1e47fd900ceb8535de8e8a72c6e542fbb4428ec6880d75c8c. 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/USUM71803873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1b0c5bdb067d1e47fd900ceb8535de8e8a72c6e542fbb4428ec6880d75c8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM71803873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4990d05595a3e28bb665df7a2a23bcd655d1497159fb1130fd78ffc31f9ad301. 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/USUM72022666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe288cc7172cdf7bd9683f850b131fdf9874a8c2f79eae7fcb861b5263b544d. 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/MXF152200381.