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 0x4e73ef642ec6057cbf4b00cfe89d5f89af0872166e42fcf8791115c8bd2591ba. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/017ebe71-1291-43be-b894-ae7547e4495b.json and https://artists.proofprofile.net/proofs/artist/017ebe71-1291-43be-b894-ae7547e4495b.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 0x735f731dc279dc491b991eb91bfddf28f94fabef25eebbbdabe87e75e0d3d9a8. 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/DEUN61601002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dd40a7e8ed7bf93b67b4514799390339aabc63bf36ae86c20ab6ef8ddf9105. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEUN61601004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b6ffc19a3b25fcc6677527638625fbeedb8b560ffb3eb659d938102c3c7079. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:49Z), 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/DEUN61601007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11fa9fb4ee40a3717027ef60bb51430da8888e4fd21a6696b43650f45507e6. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:57:15Z), 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/DEUN63106302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f4ff8c6883e0896f3cd4ff20ff01f2ea9dcd752e70abc09f59a1247ff2549f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEUN62106303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82086a8e2184f0b4ba6b70a8a4ad86554e820bee9f92fd7ebee416facbb69402. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:34Z), 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/DEUN62206304.