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 0xa9a6919b6d49f3c9b834ceac5ca3df06dcf38101ca937de1e1a64ef112a01e83. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3b06526-8149-484d-b304-157ed5474add.json and https://artists.proofprofile.net/proofs/artist/a3b06526-8149-484d-b304-157ed5474add.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 0x21ec72e266a7b77617f606ebdb6ad14493db67b9d7f69ac847a5ab4e571a71f8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SEXII9200101.
Om trädgårdsbevattning - Jan Hammarlund sjunger Brecht
Progglådan Box C: Folkprogg & Sjungande låtskrivare (Live)
UNCOVERED Malvina Reynolds sung by Jan Hammarlund
Down and out in Vienna (Celebrating Franz Schubert)
När soldaterna kom till vår stad - En visa om Sundsvallsstrejken 1879
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd99bd8cc7680474ee8a8e67aab018dc264fa3778cee842888a7d68e6eca0b4c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/SE3DA2502701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc283ad9dea435003dfaf7e495247a283ef6dd68be18d2e59ad7f0d73a058fed. 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/SE3DA2503601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9102954d1d336478e9610a8318d4a52c5a8ee95264ef08bade8688c2c85d90e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE3DA2504901.