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 0x7a3a6ce6df891ed496e6854e2995e4801026196ea5805ff18d50187aaadb5574. 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/0bc78b92-f077-4476-a8b7-c47601211768.json and https://artists.proofprofile.net/proofs/artist/0bc78b92-f077-4476-a8b7-c47601211768.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 0xf46a983d42d9bcc0a8ef79498b0608f4c4901bf2dd6323e7b2d0c31521f83ad0. 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/NOGTA0918010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215db456610f8227b3bc00ebb1f7373424888c6f05f6c21dec821705ad895e26. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOGTA0918020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472bfcc72e6174104bcdeee0c2753b1755ebba14a54dee31d9a087c04f09307. 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/NOGTA0918030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a953c965983f8b83ed6b7bbe93bc2540875449a673d9596a558ce83a9a7e4fd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOGTA0918040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e00b6cd4c1429505b32a560ed982c40af0cfe4ec05b8a608719c0226d21741. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOGTA0918050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223839cff7d8f4d28cd59639ef7b682293cc0bfcc9f5aeea53a4b3002e9f9dfc. 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/NOGTA0918070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2e2d03ce0b0cac92ba1842ef92a8229a9ffb8ee527bce5eff5c9d84f0a24b1. 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/NOGTA0918090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334a42a33cec8f8104bc92dd459b3ac2e986f1e16a60f169f79bb1a486569e9d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NOGTA0918060.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4db0459b12993ef55e211985477791f58bd3286e10d9450c036876150051d4c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NOGTA0918080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc91ee6d7631c78c90abebd00a6ff4fec360b1490e39307a86f21faf382f9f5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOGTA0918110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275626dd035587ae47c613bf58668157e02d40a0859d98cdcee010f62a3fb517. 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/NOGTA0647010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bffb4533d9a510dfcb6435d007ba745b8f75d04bed37ba7f6ff69f459be5ae8. 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/NOGTA0647020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983dd36dd70b5db85effb679cd044b63f403bafe3d3a4b6c746b3d0ea50cc10. 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/NOGTA0647050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb437b20dc3104e0aca3e92ef00e1c18f0ec7af0ab0e5700728248d8c87ed8180. 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/NOGTA0647060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbc059ecfa4372f0e38c1c7d7c16dbe599aaf3ae17e47c810b85222cc6b9eae. 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/NOGTA0647080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2956bcbb1757668e3e52c010691e0cf37f500982601a7f2248696e114be94f23. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOGTA0647090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a08c77b9df478a933059df1e2e7a468aaf03dd21c5f47c3303f4032ac914012. 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/NOGTA0647100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22d0e03369c18b3be9ba80bc075cb08bcb9a19b634432d743cfc4151ba2597b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOGTA0647030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b862d37d688635feef18151f4157c4595feaa2b5df349967ccf5189d4231a5e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NOGTA0647040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd669ba70578ff5b6c2eab4a604fac250bab4c73a96d4417cad9718d517842a18. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NOGTA0647070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6180311bb491b6abee6473b6d6a442853d23ed55abace5df4a26eb052de48c7. 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/QZTB22346785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ea55401a89842b26bc2c0e48d57202cc402bc9c21f1917a3f05e06c51c521. 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/QZRP42309149.