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 0x9426bb95e61063200837d488f561e2b8d014702f83b793cd23939d314c1aaf81. 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/e124d352-1821-42ec-b9ff-a93ffe82dc16.json and https://artists.proofprofile.net/proofs/artist/e124d352-1821-42ec-b9ff-a93ffe82dc16.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 0x50cfd1eed18a812bf3e10e3dc974bc7617cfe10c1acf234a545a0612b01cb2a1. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/CAM460428414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe736ca6ad6d8336c71eb756f08e7df6ec9bf1ddce691e312d5fe6ad6dc3aada. 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/CAM460436076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16344b68268b4275d6434e145a9ee6f8ca476419df63875ec248a9fcf42facd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAM460407768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e810ac433bd6f5a0f25326d1b5fb3ff784bbd8d8ffce220aa4f53fc13db7f67. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/CAM460436407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35fb9339bec5a3f4435c2db685fe112e79c86012558f2f791a74b22a2389e78. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAM460419389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a6c6c1108f9e06c5cab92eb9313592efc078f5f5a19f40524e7b98bf14f27. 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/CAM460415545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d61823bd0822678ea949172b14a32812ac3a957be9234594b51d4fd0cdea17. 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/CAM460419268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db15e0129a2b2e0e00e02e3c739d63b81fb28c8c1b6fb75a124ebfb8b0a9867. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/CAM460431359.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e78634e163ce84e8a7e4093db06acb8b6ae45be14d1f7ac73b8f51d013eff86. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CAM460701422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fee9c60251cafcaf9949c7a06ccef43e7b059f76f82098fb0af9aa9134db3a. 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/CAM460435525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d99c7ced31c1905b4aa17aa72743a5c7258a0fb1ab150edb5b965213ec7bd. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CAM460419391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e1868e3d47c920a7991e7375acc8562f3cde2bf5491601801bc17c766a414. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/CAM460408562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0540cc6ceef5879e4615e8fdd00d7e16ee0de4f72e8140445522c74cd92655af. 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/CAM460439644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ddbad04ca4cc0e37d5ca7a1bf655f5245f7a9f9fe0229b7a445315dd30cec. 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/CAM460419342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c94fa7582bfa5f9ccb2a2ef56106d952e4385da1494ce8c88f48162f94ff4c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/CAM460409754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adccf4684667328df3d6e7c13b3fcdf7319160cebc99c75751f013d3735a6fe. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/CAM460419263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5494b74bbd70da5383d0125d6855920c7f475690d5621c73c74c8e46cc87b9e. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/CAM460403393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cfe14c522e9d919e40313ddbf45db66f6b4fca2618185206f60037a980cf5f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAM460428006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b96c7ab8c23b43b3abbc9b3d93a35767615c925adf92880f1760bab2adbd2a. 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/CAM460700994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e87fbba3a69aa768185205abae7fdef85c373513bee05f7a96b421024c369be. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CAM460408878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4de64b9c83cba58d2ce620c2e22c6c8867515ca93369dafbc2bd2d357cf58b. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CAM460409957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981c5e66a26443e2fbdf89684743bc7ced8010272a5aef853a430c543521ecf5. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/CAM460418020.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db4b00b6a42c2711281feb60c823c1cf3c0c1abcd44996b46fc62e2456499b1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAM460417126.