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 0xd3e3f0c862eca81cee62c0267e60502464ebac8061e17e594bf3fa9acc129aa5. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4eae21fe-bd04-4234-bb08-f6e2e3589a9a.json and https://artists.proofprofile.net/proofs/artist/4eae21fe-bd04-4234-bb08-f6e2e3589a9a.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 0xd1e53218dd7c670b37fc24cb453f9830ac5a92c8f3d81776612bf7c6ae40cf75. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:29Z), 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/DEA371304453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba95b96c29aa05a875b7aa20c458a1a421de383ebf92d125026f7b94aecc5c9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:25:49Z), 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/DEA371304457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b437adcd509d9a1b835658b882d1dfafa4c259a44773b228402605308a46976. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:33Z), 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/DEA371304464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe677e7e945224f7f0a608ba7efba44d117654318925387686c8572b6473f58c. 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/DEA371304467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6eccab32e16aa84f16fffc3a3ced5cc577dcefb6b1579ce74c823eec53de00. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEA371306204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6492d97b48112449551ef111bf716b3cc573744e6d5f62abde1f0046dde192. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DEUM71724493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640e0cce6792ced116298ebb1307aee37d12a0de8fe593ba0997d7ecf685d565. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEUM71724494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3edecfd9ea886ed772348a7b0afc8107d2594b83b4aeff5197e68fc130996de. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEUM71724498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f7e96eccc60bee1142016a57ce88549f464007197156e2519d7e51bc76dc71. 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/DEUM71724501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942681fdb47184b6205cabb2360c5ef0e78bad9b6f3c97de6f71b2ab8190e8b4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DEUM71724500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf76d5a6ff6795622c8b0d02b44476c3bdf61f9080e764bbda44803feacf9c14. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEA371307248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb048027a9a2f46fb99df47a7a4127ac67163668f9b70f748fba2d26d227fabd1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:34Z), 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/DEA371307548.
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