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 0xaebb2e1d04bc75a15878ebd25a9872d4569eb73589337940c886a491e8fc1e2c. 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/94210004-3df6-40b0-aa4e-9846f0be8d39.json and https://artists.proofprofile.net/proofs/artist/94210004-3df6-40b0-aa4e-9846f0be8d39.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 0xf2acdb4233ce46065566ba044957d24ffade6337c2ffd2bf1f79e0b6a8810205. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:55Z), 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/QZHN32219548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8f4d7df8a30b6d3cf68ce1342f24fdc4a4e852cd1b9e26ad952b0aa157cbbf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN32219549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9b7739f439ef0a52688debba9c616d1d21c9d2283ee48eb6fad7f8561dbabd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHN32219550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b2e591bcbdabe7939a55cc01f7c51e6df059ded74ff5b473d80ce9bff335c. 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/QZHN32219557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8ec3775421982f299267f1b0b9a3de480c411e49c90d753ad23c73f50deb05. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN32219559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88b933807dcb13d4981cfa7d57f2fff1cf4d5da7d594ec057a1a3be2064bad9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN32219560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7d095be3cd42ff5470bf871fab176c615716a124e6344733ff5b8744077dba. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:57Z), 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/QZNWS2297493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c33f784d535ae4f442b77da50be58ae29ad86ee5fbe4ab984c67a7bc56fb8c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:53:35Z), 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/QZNWS2297494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1c9892ec4f972e9905d0998b7fb9ce401068c7b8f5dcd6e13f07e0befa667b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:14Z), 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/QZNWS2297495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a46981d7d3a0d74135fd46033ec64d546a577e20c8d8b8359129d3402010ec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:27:41Z), 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/QZNWS2297496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804e544d314458e49d77955fe6da499d0acba9a5ba6da266e8802bdfa36c6a11. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:23:47Z), 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/QZNWS2297497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d91b1a556c8132d6d0c4733a50be020a13487fe80dde7420456d3b7199f75a1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:32Z), 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/QZNWS2297503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f4e98619f7c10ef5ce767c1b1fbc619d281abb65bd1f84bea1f26197de8dbc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWS2297504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439e6bead88309c951c1f3a86ef4063547ab71ee252607777cc919bd93c7f35f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWS2297505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd81883001d8279be47c96e948c6bb023e669b31d2b5bb99d0dee565c4a21781. 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/QZNWS2297506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376ab1183d929d60c6eb89541b224babf377fd83eea355395198d9f041abd088. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHNA2363342.