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 0x3904df667a27cb8d0a330e4b334fd93ba4b27d4ed74936de7761eddda66386d3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ded11ac-b8c4-4be1-bf78-7e613b70d56c.json and https://artists.proofprofile.net/proofs/artist/5ded11ac-b8c4-4be1-bf78-7e613b70d56c.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 0x3ec36b0fd3e3f042f34c5f9134ee8ebbef21d9b3dbf62150c1218835fd6db4a6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V1898453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07552e29df33305458a6b55fc33683e1ec4fb282e5163eb979544936f0b1c256. 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/USJ3V1898455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f100f2b66dc021b4d94d6dcd72130cebbaeaafe33bd47ab23c69833577f4df6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:59:58Z), 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/USJ3V1898460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3324b759ae32acb3e0ec1d37eda85fdf6a32eba42b3d869c74b22a9258651a31. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:45Z), 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/USJ3V1898466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2cb8a17f370b3cbae3225ad3169df5b768e6ad9b920f1e519dc95470b82152. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:52Z), 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/USJ3V2007265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8c451a2d66270468a66d49d78fef948b5be6ea9904cd8d985de52989fd6d53. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJ3V2020094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ee09cb770a05377ab2538f18175dcb3432cad7d0235182130aae5d8dfc25d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USJ3V2020096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f300e055653a9228b04c9ac2e730bf03472c1d96cf78837755976a0b7fd695. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:36:17Z), 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/USJ3V2020103.
En Vivo Desde el Ejido Montes de Oca (Homenaje Al Sr. Tachano)