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 0x3c27070219301e67799ecd459261c81ad22f97a290256dfb1020aa138ce37d05. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e71f8049-afd0-4913-bd90-adab7d2f241a.json and https://artists.proofprofile.net/proofs/artist/e71f8049-afd0-4913-bd90-adab7d2f241a.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 0x814cc76888d783ba7fce1a5257f6d2834bcf8833f6dc179a619e8e08693e1a4c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6J2458351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3825e1ed14730a641bb09cc69d2f6520fc26d1101eab0e7c7cc8b0e788835b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2321279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0df38c9b9ca0afb0d2250ab4010b3a83bb9054dd390b8dd716ee5e3e480eae7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2393910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0185d932f14d81100260983d362d07b0f5c1b2466cc1707353f9f7b117ea3cb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6G2456265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb34a21535092b1da1f9cc3e9b62f766f074a23bf7bab3a09ff19000ea971518. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:36Z), 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/QZZ792481626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb34a21535092b1da1f9cc3e9b62f766f074a23bf7bab3a09ff19000ea971518. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:51:29Z), 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/QZZ792481626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b871c6231ffd97de098497e8da902445c2438c507535b3725c8b03a19fb17a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZVEM2525395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabaa235a1ad24607a264616c1bcab69e88cb37b4a4bec950ac2ba6005b2133e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZZ7P2594309.