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 0x25c4aebe7647dd9723119742b7b00e004b945336da55b0c68519da2de4eb4d4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3250e465-b5e9-47b2-b8b6-ace92975c8cd.json and https://artists.proofprofile.net/proofs/artist/3250e465-b5e9-47b2-b8b6-ace92975c8cd.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 0xf0fce050f6f23afaea9278e53130b6866ce9f44f4155c00f50ed12a53196087f. 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/QM6P42544527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2681185dd19e14592665c8efe156e1d9cb87d2438bc55bc31dd2f3b65556ba7. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6P42544529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23243419fbb5fb8bb0069c30129aca51d1a99110d320fa5a465e8a2361ec5285. 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/QM6P42544530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca807333a381de76ed1e0b0ac160926b921524c9c807f79292b01d5878f99bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42544531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70423ba71fa6b4855a53b35050c8424b937f2a891833abeef9943a13d02efc2b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6P42544533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08834c99a17d8117ae7d0e42fc3d4f62f75b063efc3d2634a852fcef1000fe98. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:05:58Z), 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/QM6P42544534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d39414e67071b37f78f397f449ed3deb20bec5995ae6f18919c0e40ce22be60. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6P42544536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830e1fb92bf1ab259f8a868aff9371b41006e60c6628b6848241f21d3574afc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6P42544537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd17ce72fe03af43a6ed853cacf4baff67d8b79bd583ef42db34a2222dfbada. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6P42544538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e337e8c86257475ebb68e5c2dc663eb39b53c2fa78edc4f503594c82f90e60. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QM6P42544539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3872d6353c602ebad89e099f65390c941b85be742c89302e6ef8e3ddb7fbfcbf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM6P42544540.