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 0x5a969c52b7918bcb40d43de7ede12da1a23dc1522b74f7b89eb7c06f591a5c0e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e693742b-2fb5-4f8c-ac41-df06f2160562.json and https://artists.proofprofile.net/proofs/artist/e693742b-2fb5-4f8c-ac41-df06f2160562.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 0xed78ae027216a7955bf988f0e2b7dc5c8cf879ca2c3fd65c18d91be5ae5b3fa7. 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/USHM82330876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33342dd09899a39aad18d496d107c35ee6a9412edfb09a1f4732b3119c4aebc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM82330877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79855c0146447b863f4cfcc3e18d639c88e578e168b0004fcf94f8c77e9982. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHM82330878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8bcdfdfa1785504280f53aae66fb6086742099299fea9e95ec28ec096f49c2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USHM82330879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3f272b7a53f72e563338451406373b298e770fbadf9be5e40dab2beb97151f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USHM82330880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a446bca6a335851f44763837ea445f9139f8c0511de46b3c6045726fda4397. 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/USHM82330881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06545dab7821bf6071592f7b3991e0ac7350717b6d68903741d907d688f9a59a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USHM82330882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd4dee0b82a63d511901db74db232485c21533e11864a93d2a952d2ebc1117a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM82330883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732239a51986f08d1919369f5edd2a936ba90b9954099d406c5d2521636a4fa8. 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/USHM82330884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22cd04d2ec2f1b56c16c9104fe6809973b2e625515a6752f220403547d0c91. 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/USHM82330886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409e3544648e132f8259b822b506deff2ab27a4cd5e0c32c4dbe1fb5e85740f1. 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/USHM82330890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1891d4aa902f712cbd3feac58833f62c46adeba8fbbb6688f55602ee7c2f3e0b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USHM82330893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94f7aedd8fab01003fec64fe2053b22b84cb2aa02ac69cca9417e3d3913b078. 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/USHM82330894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e0bcebbbe2243605ea43ef25b33ebc67432c2872eaa55859c0b36924234f82. 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/QZRP52472253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d31ddc74e0c65e00dc8915e7b824cea4e96f346f5919f67b03d31639085889. 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/QZRP52472254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae256239f5abe73be4fd0c76660b11e7cd905d3e98c8d6a1b3cfa6c844ed881. 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/QZRP52472255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8529fdb4bda5a4baee68985268bcaca6deab2623ce77f46e6b1562c074f32f. 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/QZK6M2303038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1d0934be7dba59303e1d108f6f1b9c0fa8b2e4e8c77afccced824d466c9594. 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/QZK6M2303039.