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 0xfc414ca1d852f40d2d36cd10cd35dee5de084bd0db57fd6f37f0c456995d21e6. 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/c47f14f7-a775-489d-8fcc-83e09b86201b.json and https://artists.proofprofile.net/proofs/artist/c47f14f7-a775-489d-8fcc-83e09b86201b.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 0xbb439030df476079a940f9064596e95bf8a06f34c9b7161661a1184d42b9a95d. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:52Z), 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/ARYQE2310017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa651c82657d4235be68eb37c53e36376ee902db5aac3722e971170181f0a4891. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARYQE2495356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df4d418c8a6faaa6890c3b5631da25072f2681bb6444a5e71d4a8df9cacf479. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ARYQE2435354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e175ea481357f54bae4ed3c1b2cdf6f58b643c75141b0e7c6dc37f91b28113. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:58:44Z), 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/ARYQE2435355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db0c5e5bbcfb44cb5e8dc208a651bd073a5f3231fdb75f3ac683f36845d426. 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/ARYQE2426006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eeff80faf0985954cf89146f5710dc0bf774ad500fa1273538398b36ced87a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:02Z), 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/ARTHL2500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f41a4810f6638a54afbcb4e25781a5cd7a8951bc2717626909f2ceb2bfaf60a. 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/QZFZ32299131.