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 0x00cef854dfe01d06dc9b8d7e7296daad57cc4af7075927f38dcfc7ca34a8ee12. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fa829ab-9782-4667-bca5-0b415e13552c.json and https://artists.proofprofile.net/proofs/artist/9fa829ab-9782-4667-bca5-0b415e13552c.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 0xcf3116276c813d6d1bea982712796a07ba80a31d075d752f5f4ca67b3be21173. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:56Z), 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/HKG732102093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd383b753fac3c340e52d9c6090d71d007fa4ef29d385a723585e98ec7c0e531f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/HKG732107112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a40e187af6f1be088311b3edc31ce0883c16b3ea3de418f2d7f8a23e5128ba4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HKG732272767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18116bc328c2d8a71c58e64ce7e9d0b789ce82e4d5e3cb292bf7f2dc2e978bd. 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/DGA082369439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf011f5fdb1a16fe19f7cc60a13813b8ab4d4bffe18ab8d5ba7ff81e21795bac7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:04:26Z), 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/DGA0H2318601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa996f1644e69b0a2c2a2e9c7431da8ceadb4dd852d11aa751fcd92cee7b44c02. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZZ972479764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d996c839dffd9c9651da3060bb751b12cda7b12f3b5e4602c2c1fd2f810b10. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR10S2470251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f947c0818b5dff96ee8c5a3e802ea7d7c3744e8fd21122d939f43140d2bb99. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX872453102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a6056c18a12786892f6d0b292ba4f4fc62a9bb9dfabc0cec1203ee19c0648. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:09Z), 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/FRX762496401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542db9553996463eaa970b5d9e6d41b49e9b4fe65b70a215efafedd9456e4c0e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:48Z), 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/DGA072428754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c87a1af04e1e11b817cc7aba89060e096828bd895f4ef3639aeb32d46c0a65d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DGA0L2491822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161a51d9e5dc0d5a33eaa5122b4a2c9809d7a7f96b0983eb0c02d9b21ef743a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0Q2425311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dda07026034cd8a6665474e993abd3675b21a1a1fedf4941b34fade52852a9. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:19Z), 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/FRX872526288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d5f53eee8f2780500fbcb5405ca79bca6b2004a1fa752d03829aba655b75c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0P2462984.