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 0x9a323cc590bb38b90851b84440feba99eacec4f866af79bd09a6ae59c0d11008. 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/6fac8f61-743f-4178-9957-d9a69da17eb6.json and https://artists.proofprofile.net/proofs/artist/6fac8f61-743f-4178-9957-d9a69da17eb6.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 0xfde456f296bc33de3f775d4cf2311f1f9c112bb70822d17b5ad599ebf4b32e6e. 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/QZDA62452619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71508c34aa0c96eeb1f2f637095dea438d8e2ebf301269d417b1ace6dbe129be. 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/QZWFK2314817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cd38802c9ffcf452918ae9f5f7ec257b77931b4aead5b49070fa77ae357434. 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/QZTB82352904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5439fc5b991874573a5c59bc12a357f7f1d7794886f35f27a913acc586e69f9. 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/QZTB62359826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0efc39509efb65278e776041f80520d154136fc70693ac8f95cbc7f16d9f9a. 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/QZK6K2302539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb508b06cedce461cfa030c07149357303606293b51be54a5a450f3420abe9928. 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/QZNWZ2207994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59792ef905c7b8c099559cfcfa14d88141d81e7f4ff2003d26d682022c46ec6a. 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/QZNWZ2207995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c48da8e35f81cf20d8a1c069cb839692983ab9c40aeadf6b647617bc9b6294. 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/QZNWZ2207630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4c21ed68cbf1ae04fe34ebebd82f766343ad8a4a606edf477bcc24e4901e6b. 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/QZNWZ2207993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c8a30f0a2e15c804581b7bd2e819ecc9f96231e4b96838926575c52b445c38. 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/QZNWZ2207013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363779c5d0efe8e79c23f8e81ab172c8c1c33c32205edbce24811c52a7115bc7. 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/QZNWY2292680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4839f0eb6507cdc0dfd5c22787c2affbf7a4dfc3132991a841e12081a516e92. 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/QZNWY2260449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5189cadf12c6ee46d7cebbc30f0ab1557978d66b38063f7f1f5a27992deaefc0. 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/QZNWY2261667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c174831580450c8581b5bbeadc0c411999933b2d0f453cd015c2b74fc7e9873. 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/QZNWY2229768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0e17daff66a8179b9e5c94ebdbccd916b6a304a08f539e413d03adec3e3e32. 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/QZNWY2211505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fade80ad8c8a0a2a236682b6a1440ad67441359d3e31b6b909b654cb1975ae. 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/QZNWY2213037.