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 0x9415490afbf142c8da23e72d92bfae5ef3ebe002b421a1c407d218d34a0950db. 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/2dcc7d89-010e-4e31-a133-795cd8f599de.json and https://artists.proofprofile.net/proofs/artist/2dcc7d89-010e-4e31-a133-795cd8f599de.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 0x25c625398b700dafeee88c980a8b07183ffc283a9612b220e11fd0aded62fdb0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNJY2154300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6c3bc3f3977c5f342555ff1319692a713cb0619d9ad375d0beb13afb3cff92. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJY2154301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b5bfb6dd63570ec73dae55fcfa2718451b5edd0034ffce28e832f3acad38d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNJY2154302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b69d7b8aa01ac34b6a3033a8583dc6ad98e3a822b0075ecedbba1547619060b. 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/QZNJY2154305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f30001d6323cf512ecec50be9db68ad0b00cc5fcf9e6f23f85582ad0aabf9b1. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:41Z), 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/QZNJX2353505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ebee25270743be7a3d08037ab1ffd30f729db618c703c4b9db6136509245dd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US7VG2474861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb2cfe4dbcd829e0c2d83f73d3dfa79d32a492fd8350eb18b0be9ec7e6051d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:28:15Z), 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/QZNJY2437292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259fd625a7375822a7bb8b75eb860f797edb91929f55e252d0779f703dd41ee8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJY2437293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2047c741f5e5b16056a04403d1603f861e6c24cbf6b5213f65f763978cc3c737. 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/QZNJY2437294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de6708d5a69b554c44b7992262e6197d0b442fb2c230d6797f64e4e38674bb7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJY2437295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6ef96c3aaee0bf409b0747ae9de0293000ac8208450dc054ee630d2dcb10b6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNJY2437296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b96d4774e73050f59c263e077bddbe5fbd9e0002eb5ea3008d1b1d1262b6f0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:43:57Z), 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/QZNJY2437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eb3f42093010fe1bfb565c51305813a29ead0074f8b5fc59a8888b1e7cde3f. 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/QZW9M2465669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d0d08df6057368c935db72ac7881142430e9251d00335c6486592ec49062d8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZW9M2465670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ff62145eded6788fa834bcf40c5deeb9318d5805d32dc176c250ee3297bd43. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:51:02Z), 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/QZNJW2589330.