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 0x84f2068a24d7a21b8b4e4067492afa3c2ad6db0b83d7d86eee6d8b83a5be735d. 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/4b6df84e-96b6-468c-8a17-63789638fec1.json and https://artists.proofprofile.net/proofs/artist/4b6df84e-96b6-468c-8a17-63789638fec1.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 0x45f83c1dab62a6c8796ce3600c59ee0c418dbe80d3949873c73b8ffe8f4cfe43. 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/QT3F22421461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f039ca9d254e77506d8861c16408f348c7198d858638563942a3405187622c. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QT3F22421462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5bb4cf29a40209f473c2161beca4d0f39363c79d0b51dfbb49ab943c97f989. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QT3F22421463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03d07c2f2330ec2294dc09f92c99e5aca3c51d864e094907c48c0d9eec3dfa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ22507727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe7fe31424bf967451b2d4ee0b852233bc1d2e0f1fb9de3083c65a51f98ae19. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZFZ22507729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85586d7097a171d700204183b3c9020c2cb39bb7e98edfaa996dd08486cdc201. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZFZ22507730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18728b29e08fe28cca923ac92ed170f3e290d24e7341b404ed2dd6aeabbe8f6c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDA82524454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea12b7ae12cc17907c47d6b30a27a27aac68a063189eab0e2e60b21630beef9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZDA82524455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f1479d37382677a13e48bb99e73f2142504320cfd93934dbe1fd138b0996b1. 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/QZDA82524456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5292d9f65bbd1bc24fefdf1f3635b7a568514c0ca1ffdd8753013fdb905dd5dc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDA82524457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef600babfa89a0bc05cd82d9f277165d0ed497ed8d0aa2c4ade9c55eb3a4ad. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHN52528146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb1aec3de5cf4eefbc5bbaba9531742e5876357ef2c4271df47de5078e15da. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN52528148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86c180756d65848c5b6af4b3e6736c861ba5fa5fb63f5d405d2d06f77cd8ee7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWR2515972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca55983e437acda45f17028a0567022a51b024d2f1fa240373dee972506cd6c6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWR2515973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc8281bb15fcde2ad2bce575a2f90e1c4ace206e9f2252b9ca984c7e6bbebf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWR2515974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38509b2ac8152f4fd8b3c42623e3cdabd51c881a514f1b4c90fec18c0b5849. 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/QZNWS2534927.