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 0x70439af9eb965a24910088f181cd3403a015a6a31e3f3eea95038b6486995d8b. 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/4b441f9f-ffe1-4d29-a527-82dcff029886.json and https://artists.proofprofile.net/proofs/artist/4b441f9f-ffe1-4d29-a527-82dcff029886.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 0xddf4fa42730e6f014642b5dfaaab90d6cff262c4de2659d596d8cf1a56c0fa2f. 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/NLRD52200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38983c0103bf784e59dff325a1947aa71ab1625727185ef10ff89016a3cd38da. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:31:22Z), 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/NLRD52200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264c64e95b3b679b81bc58b3d68b74f04b7941b6a0b649a17ad529a8ed123fc5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLRD52200069.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a424cbf9376c06f6b197f908efac40b0778da7d271348347afb3aba6b8454df. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:56Z), 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/FRX201730046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc90c6166812ec6284836de943e1055096e0decd4861342487e15d59c435a94. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:30:26Z), 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/FR96X1734483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198215fe10ec692f27878760d19435fb5bd647c9ab1c1a2e1b2de4ef465a0068. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR96X1734492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e088ffd449b572936deece5c31ec59df3523d7a23a3f9be62dc050fe7de29a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FR96X1759966.