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 0x13c4538a94a9828374ebcf38b2e017950164251619a7b8820ebf59cd9e1bbc2a. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7b5a3fe-160e-49ad-9201-5e2d4fe94a83.json and https://artists.proofprofile.net/proofs/artist/a7b5a3fe-160e-49ad-9201-5e2d4fe94a83.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 0xee9dd85472d5f0fc309f67f7b8092661fac5fd19e91b5ff166bc4abf3114b7c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022384324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a684d72218d20e8a8de291065de13b6d1dcfe56c0ee12e73f1469653cf6a5ff. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:23:58Z), 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/DEQ022384353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc79abbc6727b00922307076c767123a2e40f2ab8dd9dc7cee98401e96a413a2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEQ022384359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad2cbe3c67d5f59290c2257fdd365e69c6d5e4b2f9b2cc820453951087c6486. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/FRX282592194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483dcc3e683b6c49e798d2897d7f55735fdbec6b65841c9bc0cb78dc04f4b4bf. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:59Z), 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/FRX282592195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5380a2821fbecc0f6b33ea277bd0b53efab18c72f6dc79599842bf1a9e19539. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FRX282592201.