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 0xa0128418e877065e494153e50d7c1946c6b1ea9316172239334394ad8b691f1e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e9095e3-7c02-4900-9e82-c7320c8d1876.json and https://artists.proofprofile.net/proofs/artist/2e9095e3-7c02-4900-9e82-c7320c8d1876.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 0xf38a374b135a58b2bc7b40900bd042b978ce47f32074f6f02c7a4db605c4c9e8. 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/LVA100500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59f196fc353ed74a97ae46cbe6ad4dc1b35cbe123976491da626d6b12fad4dc. 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/LVA660800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8e878840f27aead1235e698a367a2ab42155dc2fdd01ddc824e839e100406e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/LVA660800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8cf759e97454dd1b249aad0e07abb110114723400518160ee87de48351b547. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA660800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6691965fd22976284a9606605728993bcfd9c17a7272b6d9b605fc93e7238e. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/LVA660800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59f196fc353ed74a97ae46cbe6ad4dc1b35cbe123976491da626d6b12fad4dc. 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/LVA660800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b8c6790c81992916ee1392739426113c40516dc0ff82a11741562c8eb2c28b. 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/LVD011400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc1c6d36502ced60ac4af30bf52983e30f3239438d0aec906dd6f5ad668f55. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZGWW2093256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1200bab0d0b5a6b8c0300a7a464fb5bbda880bc29dd31d66a29ee2d1b1c1bd8. 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/LVL151704078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aaed24861f15ec5df5c1411d0bfc2932d74de88e250737bae338b3cdb3ad2b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/LVL152500953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a08a6822149cec407f65c2d7f90bf77208cc7b4668ef5d6a8ebf884c11946bd. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/LVA100500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ff232d095523e7e94c758e228f250bf49e86ae04b1cc6c392802ff71d4b070. 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/LVA100500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38a374b135a58b2bc7b40900bd042b978ce47f32074f6f02c7a4db605c4c9e8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/LVA100500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8679bc8c21c18bf3c75c3f5b615c5471176bd219c49a23068c8e522c991f3d98. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/LVA100700033.