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 0x265271034ccdc3aaef583cdf7812dd30e10de1434fd3a417ecb9763f079ff1bd. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd8018f1-2ca3-4fdc-bbae-e9fc7620eb51.json and https://artists.proofprofile.net/proofs/artist/bd8018f1-2ca3-4fdc-bbae-e9fc7620eb51.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 0xa9ccd3e95528e36af24df0a85fbe0f3b8c0aa1d35b7cd640fdbac9bcd4f7911e. 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/QZTV32351777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638836c08998e7d70f6df65312c3853205621d2e922985dee924dd40dfbaf88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWDE2314420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e858be77674d2cf9f75a3ed45f39a4b29c80bfbde51531b298dbd7309e69350. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5FN2470465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d8a442413e4dd7d0499f5fca765ec2750134bde34461f2e85e58fef495928. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5FN2470467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f0a9732e87929f2cffffe774d09932489e989963b6645082f3aec39076bd7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5FN2400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b4869a2423e5def1a7da169ea434ec060f52dff6f0340020040cbd8c096826. 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/QZWV32342990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdacfdd001949bb08b50d6c3c0697a9b6562c7794d83c25e712f486bf3b1f6fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7NV2000336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa5c0173baaa15a71ffde991ef5e2164865abb17d1a9ad83e532f669017c134. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US7NV2000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1200637c62160928139d397ae9da20a974bf3439448adcfdfa848a43002cdbc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7NV2000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f0a9732e87929f2cffffe774d09932489e989963b6645082f3aec39076bd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5FN2400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638836c08998e7d70f6df65312c3853205621d2e922985dee924dd40dfbaf88. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDE2314420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ccd3e95528e36af24df0a85fbe0f3b8c0aa1d35b7cd640fdbac9bcd4f7911e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTV32351777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ccd3e95528e36af24df0a85fbe0f3b8c0aa1d35b7cd640fdbac9bcd4f7911e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTV32351777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c7c2a06b41d462dc8510d8b5187e387a0c0dc171eee592965fa7272aeb4060. 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/US7NV1900286.