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 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 0x21ddfc21139e3d2c54e5fd3139e13eac6b9791597babbcc942ae9e70e7122b96. 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/78f4b8e9-ce27-4ef8-9a90-ed45c98f7698.json and https://artists.proofprofile.net/proofs/artist/78f4b8e9-ce27-4ef8-9a90-ed45c98f7698.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sospesi nel vuoto bruceremo in un attimo e il cerchio sarà chiuso
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 0x8ae8cce8cbf6e15b41f737dbaab508b328404b6214efed0c6baa35dc52ac934a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DEZ651354399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801f18a387cf31e9904ed10f35b2d4365b1b960a051ee285f46324b842672e1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEZ651354403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a2e0a6c6b7bb72e4942f62eb06763aff7c5a0bdffa6ae9017802801f437d10. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DEZ651354405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07613f51623f0ed4df320da84c77c8461ff969815f7b1600f2d9514edfde8728. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USERN1010751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf904e5f3c6376006558bb3a1dc781f1b7d6a2621712cccf08ffad9b5d17f76c9. 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/USERN1011316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc5952c018d16a241213e3c52cf06d8fa1fe2d4e0b4d90e2a94ef3193d398cc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USERN1011323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a36bfdb7dd82f893ebc566a9b6070c72c743ff5852fbca119312eb991c4fd9. 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/USERN1011315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233535e15bf0f24e009ab4782b45e3b7698464282eb307a12b5cffc07bcf7361. 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/USERN1011317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceba514c51a80fbc9e80f8a1f91884f6460d93dc62f3b33c7ae8d473d60fee1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USERN1011319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b307fcd0bc3f1833222897901b59aeebcb72b954c8b8cebf5785ceee85419. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USERN1011320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562254a012773c15ebad00c9ad1f65803adc1e50c3b3c98ce48bfb00207ffba8. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/USERN1011321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e4bb45cdfc6ddb6d86a43d25fee6531601b61e7d37b2c6f7da1b38fddd8c73. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USERN1011322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc5952c018d16a241213e3c52cf06d8fa1fe2d4e0b4d90e2a94ef3193d398cc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USERN1011323.