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 0x3294fc1878afd8304fd9b5167168a6122cf2fb82a3e316b2fcbf454224c8ad7a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a29e8eec-4ec6-490a-8059-8c673c9bd434.json and https://artists.proofprofile.net/proofs/artist/a29e8eec-4ec6-490a-8059-8c673c9bd434.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 0x847a9afa3249a7dc4b0b35b44a1e9e2490882197d36a7191886150748ecfa0f7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMA22149847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71c25e4b4656719ed03833e0c36cbdbe04fe90f0bc9c4c34ce374d1c9a7a2b8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMA22149849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb27c2504928b07caa45c6b63e3e80ab919156665283189cd8bfcbc3ab80206. 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/GBMA22149851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481749cd5800d14ed607debcd4d49a6fc54f2f57cffdffb7b4be98905964f1bc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMA22149852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cdc0377a3e401c800b52021a4dd5de79873f97b0e63d23d73d6d529e9d55ba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBMA22149859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d5dbfbac3466ad05ed7c9708128be85df13dfa40b8125c82594851091aa19. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBCUW1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b7492948da611898ee34b699de20c4b0ac2121a7c9c8dbca3fb89b76398f15. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GBCUW1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927f90cc46325a2dbcdd68419b6fca7f1e8e846b6f7d7766c1a9b29ff81086f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCUW1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628580117cf1d966f0e49c720ca007daba0655c700640e31630741cd91b866bb. 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/GBCUW1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a34a9fba67982758143935f00c0b91e30cd0f1046eaa37482b35a4996d0a1. 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/GBCUW1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ac2725abd38b7eaa922682b9b6f5c556923e596e6efa1c5f33dd7698e1261. 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/GBCUW1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e4eae02c1450d5951696c67a97ff5860bf9d9194e0acc37661152f8108f479. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCUW1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c81a75922f8eaad603c40a49072341aec7d329d62d446012f578c502491842c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:26Z), 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/GBLFP2044956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd0acdd24b8aa77d6ab2f55254fb7ed0d1c5fd5fdfbb9c412c42d7f0e969d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UKXN22212051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627c8f49aba8cb679a89d782260cc04a477d870179623667031001dd25ea6b5c. 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/GX3Q92085021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e8e63678eb8aa21042c2d6ff4565122ae01b01d651859e5d66a2bd12ab8389. 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/GX3Q92148907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326c4a82d0891dd0941c77de436dc321ef4d5f951c26e9d48bf1eb18bb7fce32. 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/DEGC62302930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df8046a08d063b309699ab16833895358c65678859ab44a2b04af4e432036c3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:41Z), 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/TCADT1874643.
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 0x90b0df2264aa4e5cb0e78bb6e5169accc76fda96b4658b46c97c8f32f87dab16. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBY711200051.