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 0xaece782c72ac450fe17925371ea8a2a207e223035565fb788b7250fe0abddf4d. 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/4590b4fa-014c-4e49-a93b-9a8aa2d5945f.json and https://artists.proofprofile.net/proofs/artist/4590b4fa-014c-4e49-a93b-9a8aa2d5945f.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 0xc17cbef522fe8897cfd0a80bee70949a5d37592deb8affa339b2a20a8784a906. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:57Z), 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/UST8K1805716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfda2d7cada780ef5ca4b7ee94d82755d829e05175bcbe9cd34d7220c3dbc038. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:48:59Z), 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/UST8K1805477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b79ecfcd11c4ba83fe7b371ee90f6f367c1e5938896c39fe98d043930f441. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZHNB2003385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d8a74de888070d325d07aefe392b1d2119215e263d1809537fadc25d2c968d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNB2002977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052d020c4a159d6fabf94a3e9119d48cdd8b588ed490d03596268eca88b09684. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6Q2183673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e0b6d7c8baa4189dcf99da4c7bf602a93f03096ece7adcaefe483e146be46. 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/QZNWR2155114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4c61c257234b8ce21bae6335f3540425fdfcb8ba13b23b6d7f536c12e1f27. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZRP42124202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d622daf4a7cf47bf3ad0829f85ea3a50e14e75f686492703efa4dd8aa1a7cc4. 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/QZES52356374.