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 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 0x66b2182df5c08dd4ca894ca1652b0f21d08a9741fdc1889a1da11bdd2f7ea3fc. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3759098c-5522-43da-bff5-bce3a80483aa.json and https://artists.proofprofile.net/proofs/artist/3759098c-5522-43da-bff5-bce3a80483aa.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 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 0xdf337ff4112fd96e3568ce75ea0e5dbcd0687ff400b3ceeddc97a2bafd0b873b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TRA160000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f4d4735347c4f3d62aa1c04ce1267b268893928ac33377d8c5535748645f67. 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/TRA160000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b020afe691a3301e117d5013ead5c1d0f4963dd52da18e4acc00419b5b0cafd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TRA160000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45a129246907d3c3542eedecd62c02cd3de8ac2268b16d596dad6b07553feca. 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/TRA160000181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f154f9d63de47e25ab3c2940e3d080c14127a7cd6648c0aab7e5cf5ac654efe. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TRA160000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd8486459190f0b8e105398647e78f2ada72615649dd22ddc56bcfb870eddd. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/TRA160000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61709327bab624ab2e84381bffd5d4eb4bceaecb2b4e593440fbc0da8845c5d5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TRA160000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e02789d8dcf4fa1c26af4dc37a298872efda2e22cc89c48667334513841b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TRA160000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd49d6170537977fc866b6282a459af5d722188704793a0a34497503ccea479. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TRA160000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09d0f8ae87a9a2d0c16ebba23ea148d2e38f108f5309025a9830e42458d8c13. 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/TRA160000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf4cb7667015e3e9f3e433aa22aebf91875ccd0633b4fa30a3082d1c6e0a7c. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/TRA160000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a90c3e3b035d11adf7fdb99057c91eee0ff3c72b8680b1095a799968caa5290. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TRA160000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e14cfbcdf70fc386dac90113d57f6a16cee8812111e1b15ced432683f064f7. 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/TRA160000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84d2eab6d0337fe548fb9d63820093afe865d8eee1b5f2f6263528cd7ff9302. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRA160000193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd8486459190f0b8e105398647e78f2ada72615649dd22ddc56bcfb870eddd. 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/TRA160000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca05bb00ef68c737da7bce65e61b833e3cf08ccc607ec41400039c009dddfb5f. 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/TRA160000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636e3394b5542070c344cf2179ca64feea24da12521934c0a0f13eb5afb29d92. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TRAAA9801536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76a679aaa0504fa3da3949a8d6b8909c231ba1f1171fdbd801e6bcd889966b8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TRAAA9801537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c5c93f0dec23079e2c3f1ebccf30512a52f9292d4d253673fdb990c7a9d40f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TRAAA9801538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cf58eb7925f6008ec0e6815de12cf9e1965e3d26aab4c38732cf2e5b639526. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRAAA9801539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5bde8c7270565865eed10421484cb5d2fd9bd3a2c7c53d36d282647be9d560. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TRAAA9801540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3316ca61a10467f3f71a27bf188b34f00b3be4e8a15f8b6bc7f55159d453be. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TRAAA9801541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cd431297823a62440e193cbe207ba764af3a3300d63484411e86bd175f70c7. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TRAAA9801542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa7696ad7ada5d97552c8e373192a4b5c021968cf3bc4fc05c67d264a5eabbd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TRAAA9801543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa696f602bba5edf6ba6a51517c150f51f55d7e586f1540a7d5d6aa0e19fae75d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TRAAA9801544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812f65f59e632ab51f0e8e4ff8ecae8a92897b1511999ade7154a199eccd9182. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TRAAA9801545.