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 0xda73b48f38356e28a20e4ca1af43de05b983efe2b6f88f25503f5ce01fcedafb. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f70a2015-f1ed-49ed-887d-3cf48d0e59fe.json and https://artists.proofprofile.net/proofs/artist/f70a2015-f1ed-49ed-887d-3cf48d0e59fe.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 0x12b57c496587300b484c1f0594cb0396c9c093905398b0c7af24caad3f4e292d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWW2547748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac6bd5da40b5876d3bea4bd9e639c88a5ca3c9d909d35d3288a575947ba1e1a. 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/QZPLS2512715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc627eb6ee3ae76edd514109140000d870bf1f40982ffedf0d01be0924540153a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:42:41Z), 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/QZTAY2579340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cc74a6380cbe82cd01ef531fcb3a0203b4766a4eb6d84b0df171525c38720a. 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/QZNWV2556623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37798aa23151001482e1ccdfad44efe434c12c0a0a507f1f9105730fa4665d43. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTB32584305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b448e9197e06c5c93d93a46d0014445feba6f2731644ad9f9388058475f9f6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:29Z), 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/QZTB32566775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da87fbc43c61dc8c60727640828f3b61c013be4ce302f77096893b8531adc68. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB32566777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040511e3af5c829b64fe1b03f43b69315cccb575ea1df787b7548afc64dd77f0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:30Z), 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/QZTB32566780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6431c3d1c219f38217559c1d63353c0196c292399d80248d9ea6d42cb71439. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:10Z), 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/QZTB32566781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b264f87e19eb25d4f33eb785c0aea4188ef7367d3e0ba583c6b9de4129a8b13. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB82553293.