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 0xea3870e77eff4843f763010934ab4c901fb8fa427976d0a2390008c16c7b6f08. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca40913c-aef0-4dc3-ac5a-a4eae2a66c79.json and https://artists.proofprofile.net/proofs/artist/ca40913c-aef0-4dc3-ac5a-a4eae2a66c79.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 0x558225dbe8fc19d5a7362d59b19083466391abaedc5473c8a6d7bcfba40fdd6b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:21Z), 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/QZMEV2471634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac29eb72d2e154ba5599cf02755da14ce3f9286eb969431e9965a8b264c762ec. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:43:31Z), 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/QZMEV2471635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b32f54dac7787139f427df94b26c8e1c376c5b950d0b3bd23ebd534fa0e7dfb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:36Z), 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/USNMG2401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc310beace37c0d34aa79a1f05ddec54547f09605481ce58640d632377552a88f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USNMG2501008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0fd93085a3488c92e172aa88991223a4e87d338095e0481af6eebc51051360. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USNMG2501054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ef7f9fdb4553ae6c6c7f757c265174c04fcaf5997d95562e8c3d3e0ea8dbce. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:39Z), 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/USNMG2501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a5512bda26f367b4a8c1fd1f22d0bfc02ba23a33f36fc123fb4db5d9577425. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNMX2500500.