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 0x4fcbc3d1c57917f55a3a920016eacbba7e1f2589bcd1726ccb34d93f42de5fa0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afd7f8eb-6d4d-42a5-a440-b9710ee93c99.json and https://artists.proofprofile.net/proofs/artist/afd7f8eb-6d4d-42a5-a440-b9710ee93c99.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 0xbbd542553ce17c1d82380262dc527180b7e8f6ef0e4128f3c4d08495f7c6b2fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:16:41Z), 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/QZMWW2434060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1015f167af1afa0dc0f47fc3f7023d831a1484f7edfb28801f2423f9794abf. 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/QZWFN2417100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b4ba61cdc1bfb2b884325e100161a4f10660173dbe1abf450a7b5e0b27723. 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/QZWFN2417101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db61347d51d9062a08afeec30a428b530742d6a2b96fefec616c09e532b18c7. 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/QZWFR2450406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500d75e767286b776111a7b02bed269a0c33cfd2efb4ccde0c31dc11b34bb20a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZZ7R2435733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc5a623057767398df0cfbb64599b17be9aa5b82a0a463fa9aeaa41e91976c9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:34Z), 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/QZHN72515175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f84047b8d0cd447f6accb6006c3c37513c52e810ec58df15d2449ea07b7ce1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6P2502697.