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 0x90aed54c38bc26a6f6b66949b826fc30ab1883b9236688fac6caf07b43a784c5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa90b50c-2d4e-44e4-b315-e7bd8578d847.json and https://artists.proofprofile.net/proofs/artist/fa90b50c-2d4e-44e4-b315-e7bd8578d847.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 0x36f3ca8907039b0ddd978d5a74ed6ea27706cd5b2e781b4cec8dec36340febc7. 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/USY280736489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1bd311209922c820c727ff4a063076a84d1f89fd18c0338fac5abd27eedb24. 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/USY280736492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03479d29dfbc185c09e60dd2bdda9e02a9fa54b09d370f09d34db614917a7f5. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USY280736490.
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 0xf9e4fb56777a9de13e4071518fdf9f4ee12859b2c5181ebea5e2c4e1a6b50355. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USY280736498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443f576e9f098cb0dc14d01eaa15820ca433f1c0426980a4b5e9106e870b90ed. 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/USHM90581881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcbdcdb3c938b8c28a69241b886df04c06cbc45e24b28b7c8433af9f034c9a9. 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/USHM90581882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482efb0beeb43cb3f320136b66d00d6927140889a719a4d5bd5c5ab6ba4aef57. 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/USHM90581885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2b6d497361056da997f27f9477c1713d99f40fa94111c0e89ec1dc490194b. 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/USHM90581886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5c2ed063ce2ce203ed9d0fa95a8a1ad048c6a517239d1f9b736fb4ccd23909. 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/USHM90581880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007ce98871e52b18aa60b830a29b55281259dfffc31c13328f333f48afb702a8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USHM90581883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1040cbc8de72b71352dff0324611ce9f87bd91a48176273942c5cd02c097f37. 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/USHM90581884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa025da057ca830f7fb0a88de5e89f8beb04bfb0249ddc93236c2b04325eceaa8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM90581887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ed56559ca6686e00c2716f0921aecd6cb325fffd160830e149868df5d354f. 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/USHM90581896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4306ae1ca9b90c3d4a1a5c9f8b4c854dffb82f1b86ae49ede23213da3947c5ba. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM90581897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34adaf762a65f1fc067f1e5841311e0ae0a4a623e2395a1e0e8e3b251921d74. 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/USHM90581898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c72d8a64f64d3d9cbd610bacdd154af514c2c28569e2e7ec63e83e6d2d640e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM90581891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3177c95919d21045ea1b4a202a2b5c7d10811cc8dd6e3427636e0dae9d8c63e8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM90581893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c6353df9f15c531b65d22e6b0be8e82e4f4d5a9b1c88798f731a89bb81fbc9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM90581895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db58a99fc52bfcc987f248b1bfdc8efdcee7e23d157843c35f317f063744892. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USHM90581899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3318cefd0e032ad8e7c15543301b6a982c6c7f2ca429b5f6fbd0d91edd9bb5e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM90581900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5487dd5ad7452035f8fa8316ee017678efaee4c02b0314f88038dc85012dbc. 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/USSM10903297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e87ca63040a91bca0a84322a861e310bc0b13b71a5354e89053af6ada9e609. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USSM10903308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eae9d6b81cd9fb47faa3d8de3fb8c6d43253cadebb7af4ed27c74c7b771e3a. 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/USSM10903309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2747fc456683e76c9ea68cab121a6dec77e53f64531345b33d78e4193bf04b91. 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/USSM10903310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5226b79ff5cd6cac2a538280cc096936a641bf340d96dd8210c233238c5aad39. 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/USSM10903315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3debbd23e609a41c3efaeb5cdd187603d8cf30a2915535f9c79b2c034e5407. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USSM10903317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f668b02b0bbe6bcdfd4858cda3c924fe9f8b6649069a24e3d9df6f08efc248f. 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/USSM10903322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b1c19dd30029165c9c0ab9a22d8682c04b93b18d56c43e4e941678f7a0422. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USSM10903323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea8287fc2b6ef032ed366e6ef52f9febc0ce1d6e9ce3c5b09401a38843a720. 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/USSM10903325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef000fb080f3911682d1c4c41801c7954a09364fe1319fe54a977ddb67923e64. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USSM10903316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959432a06cb7765e65d10bf07dcfd15616245731c4160a5d1283d29703e53252. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USSM10903318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697fc6ecfb0af4553333b528549c36cf107ae9cc321276127cde581aedad367. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USSM10903324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1abbe46d121e5b1a445c0c06aedaee9be1a5b3624d7a4fd25367b72f627eaa. 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/USX9P0630791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441a3ee6ceb57945bf7db7feb2a19020ef7668904e14cee847f5c3140634d126. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USX9P0630792.