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 0x38592c71994b47e66ecc38acd39932106500f3f8b090360e2f7cf4c1cae225bd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7efaded3-5793-4cd8-9dd8-18e38ac9aaca.json and https://artists.proofprofile.net/proofs/artist/7efaded3-5793-4cd8-9dd8-18e38ac9aaca.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 0xf19c469323e491ec9ea273364436c765cf4af41c61b21ae434cbdf7d91aac696. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM91110914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3ccaf3f8e4379999651bad0acc876ad694556bc9e3480b7ccfac219b4e5d0d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMDSR1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b05946d77e7538eee8b01c0221c908b791a5cd3481b48f93cd1e6b9b8aed9f. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/QMDSR1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f43ae0716a196f7ed96907ecc8c73f7c3c9b1f5c9279975b67cf3b8aea435b7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:57:34Z), 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/QMDSR1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b1d673da5a18d8e52722e7c914ff2af74e4e041889c6299056b8afa3432420. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMDSR1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db37682d13bd83b2e303d97a9fbfca38e4369aa28672535e70a2dff3064070. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QMDSR1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b4c5fb1c488465296476d66e8bc3034abbac454dd43f72f6f44e0ced65a3c2. 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/QMDSR1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e004bb24f6a7796e54925571e443bc6f2bbe69763238b612dd198efcee2d214. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QMDSR1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b382a8c6280f98eb63c2c638c8116d355b2422697a9fafdb8a567c86b7cd1ed. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:54Z), 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/QMDSR1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7441e9960eb50b7fa3ac5356c73c6c1464fff75d2915c667ab2e11d3b25554d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USHM81915954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc170dd7c180ccbd32634266185c6d6b6d56cdd055c351c8cd5028b2c188e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHN82040742.