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 0xaf7bda65766ee2aadc10fdabc5872b293c5ae67d3fa6aba747dd31e1e57b541e. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c62b936a-e706-428d-bbb8-06d2d5243aac.json and https://artists.proofprofile.net/proofs/artist/c62b936a-e706-428d-bbb8-06d2d5243aac.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 0xea10b8e32f9e9f1411c5ba4bcf7ed14a231164c23d673a278c133dd05439e82b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:53:35Z), 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/INK602101550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd824b161636fe8999d49187579a7bb85da9b4b3657da5f3c7c171b30f3b4eea2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:45Z), 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/INK602101584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658020563d405904998038a38faa2600c735b3c11c9c6de87c207eb0f42fed86. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INK602106135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c1cb1fccd2cf9c36edbaddfa5ca5f2004253ce5da8671daab6bbcff089cfed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/INF272300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1889e96f411628a1fe81cd881c398f1a8dc1887a350ef02d3aec4f20f9626ce2. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FR2X42515152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1771b97b354f24ea71c5029b50d4066cb847b39c31a00df2270e4420a6b27247. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR96X2596663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3544e9f7f0b05d48fbffb17e4bda463277f1d5ad5119193273e3bdf59c91f5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282536665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98301c2e0a64415ea36435540f03849457d6be853b9e7b02b557f3be4e6c0c45. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:11:16Z), 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/INF272524634.