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 0xc60cedcd79e4b8ab3f4fa64180cd48eb56496f8ceb38e0be0f0f02f125515b4e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f02bfc11-4d55-4f1b-b979-7136d01e1da4.json and https://artists.proofprofile.net/proofs/artist/f02bfc11-4d55-4f1b-b979-7136d01e1da4.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 0xfb87a43c54ac1d132707d7cf4acd8e5e5ad83250b3a5453b0504539ffadebc8f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWV2435965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7706f45bf30997ddfdf7b410904778d4a0ed545b6fe8db974bf655658034e5. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:22Z), 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/QZNWV2435970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46547466c02c1200371943ff966abc2a00f62c87a49e04fac00a9896ab7694c6. 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/QZNWV2435972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5538574c181b07ab6af20010f05439ae8bfcd55c4110e04cc8efb8aebaf1d3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:40Z), 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/QZNWZ2431175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee492ddff9cc84c7a2f94f1f9286a35d4ae148d291f5cfb529d1f48f0ff55f6c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTBA2442415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fdef73cb45373df7f237272d84e58117778014ee6d73de2e6ba09761349a1e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:48Z), 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/QZTBA2442418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a8334d22184426ac56529af5cf06a252fd7b75b2cb09c9fda067dea30097c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ772427765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d8debe1c0ba51ea615ef264cfcd99605f5b82cd059e28213be7694b37852d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZZ7N2490654.