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 0x85983295b47e3038bb0e795751badc37a7d4f8cd091318edbe4d1004f0cded3b. 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/84a09d5d-4a8e-41c0-85a2-ed116d777fcc.json and https://artists.proofprofile.net/proofs/artist/84a09d5d-4a8e-41c0-85a2-ed116d777fcc.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 0x3579d98c898763c1812117abfa751ecda55151a6d6ad7719094c7f0cf8058257. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TX2148519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26856d5f7fa6bc23dc11a92f9e8f639dccfba44526decfb0f1efa5bc594743b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2317375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20ac32775d71b47b68397785dfe710ffc7c06f3aa48c23df903ccee5b6bd3c7. 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/QZFZ42217297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3579d98c898763c1812117abfa751ecda55151a6d6ad7719094c7f0cf8058257. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2148519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06450c44ce5955392642323d540fda6106d4ac677d2255419ee2d35b87f2c9f1. 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/QMBZ92079408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f39ad2addbe3b92f6d0556dcfdc20e98d9111455d8865170001664d10a7a3. 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/QMBZ92062309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14963dcdb7c5b74904d61dfd8cb0a37581bf13fed2d1183fbed978f85aa88b. 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/QMBZ92062310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3e7c831fcb486dc547ee3219d9f8e15e2a11f9882608e3273512e0ede0415. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282052464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775e4748fe40e44aa5dc076cdfd032782f8e8753e8c9e15a7752fd7c19f628b. 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/QM6MZ2086130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84802bad622113acf97e20c940541622e9daa7bb6e23786dd962f329bfa2aaf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TX2004069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa193cb566c82705a0e7180d3720d0beba18786440c34a9a1bcd5da18eb95e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ91994438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ebf3f97dcae2daa133d96f792906236b0650aaa6358ee8fdc8b27629687d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ1909214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e5c6e9c3401546e94ed696344c3d3ddc134487dc072cd458ff7c28414e6bf8. 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/QM42K1899333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a6bd45ba1c8ba6f9ed5b1a991b8bb948da3c600bc33dca2bf48cccdaa03f7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1887649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19d6e7bc80250b884476de4553ba9e06deabef9d6c1a9ef28b5ee9a8da4756. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:44:36Z), 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/QM42K1813574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fbb9bbad2a3318e4778e3a64223966d7fe4a9be45f4efc1dd9542ce04bff98. 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/QM42K1829867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af6f11941dfa2391e45d4d12e217d2e2a90594be444bcfc8716b0b2af348c26. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM42K1769308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a6ea93b50de2399c2bdbb5eb00baf56717b2bc3a8392e96e6601de9f4dc4d3. 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/QM42K1845443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7353d4bda5fa0ff74a80106462b002fcff18f73a53e25e3b8d6d2ccfd15231. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM42K1847694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441b998c17cc00a96819fc914350ce3b2727b2735ed05e622e231cdbdc80d1ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1794113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bd3c8aad627f4269175152fa3da3961f405f1a04a380ad25984e1f86b76658. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM42K1796677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0bc91b38fe5e15d4401682e139236c4aa228888d7db3fe85ec09216d094192. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM42K1779496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a0960a2d4c8584839cd0142528309ac261b8fcdc9a2497fdf2434612abc555. 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/QM42K1794571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6840615ea14555b2baf02b211a39c228e25da939ee656e4830570459f8bbb. 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/QM42K1713696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbdbc643ae5c77fc3d3b41186290c047db804c0a155d6bc3a6148e815470605. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K1772374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615cdfc207ac0a006064521d625cfb2c7075b5c11212f31523d6ed2881ed6cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K1837276.