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 0x5275ed6190a742cf994cb819cc5b72b15a0d85d35b0de4df670c2cbd7a5f6c06. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/154ee93e-73a3-4bcb-8ff4-c6e845f9eaf6.json and https://artists.proofprofile.net/proofs/artist/154ee93e-73a3-4bcb-8ff4-c6e845f9eaf6.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 0x2ccee167dc32662d475797d4e7e8d167fa584f23792feb70001471ae0efaf6f8. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/BRWMB0102238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb04e001c8375cce8cba73edb3436f021636cf3c3963ec9521d7d94446a46786. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/BRWMB0102239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c4ea5775adb1e9db8bf3d9ff85e9dd605cf7a1d4697cb6ffea1356db70096. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRWMB0102240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4acc4c66e67711021b1c5893d5fb749f9ec03f7b6ca05fe0bc9db386e13b81. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRWMB0102241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d361a8898af2771d1e75800dc9134b2cc843d69d899bc07501c1d328d1bf7e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRWMB0102242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5382cee9eace1f6a8f8a4e764130283ce8f182296283861adf272aa550eef83d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRWMB0102243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa170b1a145c45a56e4ded236ebddefa79a34d47396f698ceaeb56b3309f5adfd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRWMB0102244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b5e5a365fd6d574da92c02383c69edbd075727edf3b55a3b68c996bfd65b99. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BRWMB0102245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa032785a5af8ac02710c1dd6f5b2a44af3f57a0e1ae7300680691b280ff29fb7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRWMB0102246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4420d097a1e4e96990519a0415407fa6c7e206c10a2de24673857c1c570cac6f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BRWMB1700631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682c46f9699f1891026e78fa64597e46696ecc1995bb661c2397836e83b7d4ff. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BRWMB1700632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55967a0eccdb4b89ad19e4869dd1fb236d87c30e4064314ca89589c339ea3a0. 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/BRWMB1700633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dcfb061d8c19a29acb25bb0f0cbfb855f7922adcfc6cfa10affc19037bc133. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/BRWMB1700635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4561fd19c68acab9589cd5603e853e17682ffbd0ad638ec019a21075e4457bb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BRWMB1700735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec9f746d45501371c173e9150b17500da9852706e154f6e5c2f391b31554082. 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/BRWMB1700737.