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 0xd1f26f42fb813dec48f24937f6963b4bb079b1822bfb9ea3ffbcae2e0d3c4eec. 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/e9d43bb9-a932-440f-9eb7-ca8a7c2057b3.json and https://artists.proofprofile.net/proofs/artist/e9d43bb9-a932-440f-9eb7-ca8a7c2057b3.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 0x402bfc9247c864eefe5d3845e9a44746995a4ce48a0bf390786c7277c7a7f2f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZANL1763085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd59be227a161202c37a6cba972cab91915762efdf3e9053363c6c9bad6293c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZANL1763086.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d611c9c737ab2a43d1350a201ec42363a5289de3f2bcca82ee122f67e33bd52. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZANL1763087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f90ef1d30e8bd9cdecb29cce3ab40d62390f9251aac522fcf0b12598c281911. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZANL1763089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b71257128845423bb3f429d99820f224f9e239f30890084f8e016866affb9b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZANL1763090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2191df8855bdfaad8e22ff7388c00f68d089986c065790054e78a58a8d00a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:01Z), 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/GBHLW1901708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b985e4f79b1178b27ea8d0be1d081ceb817cb6982919732e22cf82ba9cc704. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBHLW1901709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14555ad98021e5e413771c64056ecb7742bcb9f33a3f68f31d17e801856438a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBHLW1901712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8c18f293e2c6d54013ed3ec034179e5cd06116ae347e6998cb6f25dcf636f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:35Z), 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/GBHLW1901713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2db3ea1a960259cf2c4acab7c036407be6a18412c6dc37d2e6e6823db56441. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GBHLW2001034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89029ebd9b37c126d65a78b04410b8a81dee9433ea6ee353940ccb2077fe3e35. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:44Z), 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/FRX872271486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4145565dc5db7925d010425e2ec0658a36ff70aebf24eece58f9257e8e441b. 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/FRX872333472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda5df06f6212cec2facd4a23447e86ec1d1b3e4b5257b6eedd817b087500bf2. 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/QMRSZ2400935.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906882b15e7335c3e931ffbd6d57f900709794060ec42ed8ec22a9ab6a8a3081. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBHLW1902597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585feb81d5ee9b8ac07540b2ea7c410321fa81e8bf9650804e2a6d40fdb32c72. 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/GBVPL2300032.