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 0x6ad49f704ebd4e190f04c8e0d23b2406c2214670f28f7b7cbad0b403c81e370d. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de2e2507-0c9a-49a3-afe1-4d28b634285f.json and https://artists.proofprofile.net/proofs/artist/de2e2507-0c9a-49a3-afe1-4d28b634285f.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 0xa038b42a33f9e5a6a6377001692df3d40ab29cb099128f95afc2833400759563. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBLFP2151437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb0610c58a1c52145865e203a55e0b15e53fda567c26d099720cf852090424. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:04:15Z), 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/USCGH2382269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae44471a5b350ba619139128f3d343b206bb905339cb1f9fc25e5beed428dc6. 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/USCGH2382271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40506f945f1d9aacf0a4ee24dc1b34082c217689c2e72866107fa2160cd2d1d6. 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/USCGH2382272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f42fa2683cfdbf96b57f9d6cb714853f399a4a9f497a4cb01a7b173dda95d7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USCGH2382275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb063b985649656748f967ca1df762534bf35167a81e73dc429bd4ac4054753a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USCGH2382278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb962580528511b189e40699d3420e220f56609e880887b6ccedb626a15be1051. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GB52E2418701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cebeba7d2dffde13a317670c8ae0361eaa55f4a93b1e2206d4e5c2d244491e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:46Z), 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/GB52E2518701.