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 0xc9a3d02bad74b406812b490d6093a48c669c6004b42740a5e34b1177517a4cfe. 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/bf5d2daa-f862-4a78-b092-1bc4b979c7d6.json and https://artists.proofprofile.net/proofs/artist/bf5d2daa-f862-4a78-b092-1bc4b979c7d6.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 0xe5e9eeec76cfebcbab5de67493efbd1b4772cd0cb2c06c37645b03b2fecdb2e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1929514c45115eb5ca76224fb0360345185900024a57176f2d05516c351e0330. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM81987308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f526e8f7dd53bebeabbc74385ae897d8365134a1f8ecb66281c02d28a78148. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM81987309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b5cff9aca95b443065073d4e8f1798a544c956343cc222c6614548afeaad9b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaa9639928ce97526ed66a4b3a7cd136479f90385d95c0d9f8869dc4d155627. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM81987311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2812e69d9ac1e5336afee2a258e3f18621479f49226ebaf227f9f0ecccb16830. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM81987312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e55bd2bcea6fc81b12c14e79aa4d6ad2e2f49538aa57999b6d53847fd5dd6c7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc09ae8c9c2c69c418b11351984c539bc7d12a9e2f6914dbc60efeec383d3604. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2732f152c60fcb4924b7247a531f983fcd260098edd7a7ee30d93a60f2e2d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6091be533b7e358898f4602151305300436418554990b006533121b72ac3b48. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM81987316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240e6f0ac07cc6f674945ce0796f4b6768ab93fb6f580f91f10e21a443907b97. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b440091dc5229121a09323cad8d5d2b0e236af4f9d4fbb9bb53ebebd00b686. 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/USHM81987318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a161db36a2f4d9d2da5e136874ea506c553c72fa32c149cc20d1192250b4d7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81987319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae157885f01a19d0288906f4f5cd185b2718af0fbb06951183c5e39d6e8ed6. 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/USHM81987320.