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 0x8c9797ddee3ece50fd670f02cfe3c05533ee3258f6ef261ed1b43d039dae9306. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d6f9e0-af49-4d1e-b4a5-4f666ddc298c.json and https://artists.proofprofile.net/proofs/artist/32d6f9e0-af49-4d1e-b4a5-4f666ddc298c.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 0xf46edd36bf2eac25a8cc66c4d3072c5c25e98bf5786709873b8a265482bb4b6f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:24Z), 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/DERR61300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4214d3c7b142a487abbb03daf21dcbc3549f2c8152c96ad398c58829bef16a. 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/DERR61300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac6ac1b0f5a2da6496af972546455669658ee51a3bfcc7af78b7b1a0e61939e. 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/DEUM71801032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db359c3a8d5161f40e339c92329f6ecb82e4ce9d8fdc83464039cc33c427ed. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEUM71709855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb9a15e696f8e8eaf81063050dc73c6b6712860b88b18250866fda9a4e15af5. 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/DEUM71801041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ca8168709bea1fdccaa7cbc91e99e05ecacd6bf6c7609f32de8cab6ba0d05. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEUM71801044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f6e5af16d218bcd125ab7a2e5bf6249e4a3201f0fd5706ad326106fb15519d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEZC62370561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8727ae005d66cd249d07247933a15effeaafd1724a8f948ef3c4e621928610c7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEYU82000438.