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 0xc26ef34b99ccc8a62e6aeb2c3fe44c9f02a594cf49ec11a401a8307141cbec1f. 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/b3eb8e03-dfe7-4ba1-8701-03427cc6d874.json and https://artists.proofprofile.net/proofs/artist/b3eb8e03-dfe7-4ba1-8701-03427cc6d874.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 0x26909034297dd03155e7abc5370411b27925d6135bee06be85ed649c7dda1352. 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/GX53U2008836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7988f524cfe37e7334d27f7c73fa40bf47281d769a28e8116d5d493a5956f6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:51:31Z), 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/SE6A92122266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4735e7e34739b491feed97cc5311bb9360d6a047e8d5b5c859f890257b532. 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/GBSMU7743853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4294f61ceef3554a63d17c788c3ce56e3f4fa03b66fd6ecd09a1845f972c6e08. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBSMU7743855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f503e37110e4fbd275d2b60dbdc35d7f5dad728bcab809a141fc8b7792ec48. 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/SE6A92320898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162cc582fa72c8de0df955ef776058e9205df4c9daa07adf801dbd49f4a2d4c1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SE6A92360553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348fed57f1e95a05ed26bb79621d3e131b0ff8993ee1621488fe61a43481ae18. 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/SE66N2308266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf633f76e8e0a4bc02fb66562992d67fb4182f4fceb2e217a06cd65c0855077e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:27:58Z), 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/SE6A92381562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10743934b01cd7810796afc5535be5184e1dba8562a34934c47c377bfeb4f335. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE6XY2389961.