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 0xc86ce5409b6aec8921fe2fc93cdd28ee84fbe1ab54c510fe5a675c669fc67318. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e25e5475-2f88-4e65-ad0a-5da33a1c1302.json and https://artists.proofprofile.net/proofs/artist/e25e5475-2f88-4e65-ad0a-5da33a1c1302.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 0x56596fa55bb60f2506d83c5d0d43452ef5e4ef58c3bef7855767f181a3624d72. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:24:32Z), 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/QZMHL2497396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196db1aeb9a272d997a692dabb40f49a66d438695da58dada05430538efd6a2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM42K2484307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462377467d42dd66057248d641167bc3a0b94ac86688dc286fecc1d380cfede1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM42K2483502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e393bb46a8458877c5d6bb112545444d8acf3b60db5ee20cdcecb959d6ca05f. 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/QZS662405627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb92859a30ebfc6f691da488d649c21bf44212990df820b5625c59ea4b5f191f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS672485537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae1b711f21ff1d1a10f9740c4a97e5b85b837bb2422d41547632838a507a505. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:22Z), 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/QZS632476991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0349d8f7719d47a2780897194497af73493c0c0aae9891d7b6d6abfb736cace5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:14Z), 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/QZS642455892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37be1ac3b8c04c9fb6ebc883181cba13545c87239500a236782bba445b205ddf. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZS632452900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b63e0f798a6af70e0c6ad67e02c41c43a34f5e49eb05c857a7f531cd5ff469. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZS672422640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc09d2a5b82e17027b924a98c1b7cb1232ef9b3225434603d60e89a0a05306. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZS672441553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92651d1162fc8671dc17f1dca945ee7a8d64881bc64d1f76777b4c391fadcfa5. 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/QZS662404248.