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 0x91279247136b29b88ebbe571109f45f2f235d142204fe5ad5aac310336bf3e89. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c65acabc-03d9-4120-9093-686d863bc3a8.json and https://artists.proofprofile.net/proofs/artist/c65acabc-03d9-4120-9093-686d863bc3a8.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 0x8e4880eab800357133042bd85338df7dc759a1db9ede9a84a5b0002244244a14. 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/FR10S2263813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ccb1cb3527f9dc4c5c89ca72e8030fc3a922a4b1f42cb91454a11c2f85e7cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2263815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dde5052dbd10ac85747b7d7d7d11bf8cc19a78f28caeb175e3209d809b3fae. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR10S2263817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bff776180d9e7351764349d114bc453b2d8a5facfe120d3102e3f993df259f8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:26Z), 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/FR10S2263819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec4fdeb90c149b835b3c1911da62d7d838668ca69dcc29ddb1cca2d51a9f1c3. 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/FR10S2263821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0ff70f0f71669d107c98559a642f926aae971bf50e4e35d750aa9964018b1c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S2263823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d5af0d810fb0258ebaac3bc532232dba16e94989325382908440cd24d2d270. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S2263828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7407ae2708e852730284283f21ed497fd6107c53a5e4379c455c2de67cd2e9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X42276237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35f7100bdbccde259e4df709b05b5bbcd17e9c7802881a673d3ed9b2227a2db. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FRX872276148.