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 0x0e8fd8aee8c0f2f8031582a69f937ab6f72e7ac64f2e0f8e9fc55bf449534da4. 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/94889d43-ee15-404c-83fa-2c0206a36431.json and https://artists.proofprofile.net/proofs/artist/94889d43-ee15-404c-83fa-2c0206a36431.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 0x6013bec1a2dc5be4ac28477c294a6d766ee7c0e587c283ff01fc40326d9ff6de. 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/QZHZ52257831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e418f2e8baa77bea3c2edea9a261d1ebe8f319b71614b80a29d6252cfef2c7f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJV2222601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b402f2abad32c160b1fc5e14eebfe5a1e273bc162116c3e9b49bc2709f794e. 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/QZGLM2460637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55b2bfb3a93f454ce51b0dbcf9e24e41edaa3afa8721af6bdce384ab1d8973f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTPX2422974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a928dbd19cab30f7c07cf70ed624fe1b09dfaa332fd55f1329be08c3315ffe. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZW9K2405285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc6a53415b1c4fed0ea992a909eb9e342d726ef56fcc7414e1dfa7e1f3eef0e. 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/QZW9K2401887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be98b90faef9b8df9cceb613703329b21e8c36871aa910ce692ada3f74bf1bb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZW9K2410271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03995040fa2da8b7c4ea2e41240dd5a0a8b2c6deb40c48298634eff748c7a5b3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:51Z), 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/QZW9K2423771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b29fa50f2b55a55e73b27e8138047e09861c184b4d16984c4469600100e173. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZW9M2400117.