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 0xc403059750df116903feb4feb27cde0f39d0ed993338cb02cdae79c3fb3e3ea1. 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/2d3d9f07-5823-4e3c-8bd5-d19fa7e75a4c.json and https://artists.proofprofile.net/proofs/artist/2d3d9f07-5823-4e3c-8bd5-d19fa7e75a4c.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 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 0xcf7efbcf5942a2a5810699495e756242b2d1b7aff26ef54e9f699a1f95acc605. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ATAQ71600113.
Helden der Nacht - Chris Thor Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9f726737baa3610e41ea3f49c875a73648d0cfcf4afb20c688d048e6d23507. 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/ATAQ71900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4c0b0439f0c5ec30825a8622408cd4ae27950d3132cf508dd7ab58260d07bd. 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/ATAQ71900011.
Helden der Nacht - Maarten van Larsen & Sonix Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453a167d5d054a9394801944eb0200dd1c0a205c73e4556e00d975851688253e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ATAQ71900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae95fc26688dfa4839f3d2864908406ddb313abfde5efc7ddd1e2193733ff92. 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/ATAQ71900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b3cc6ece5b6beae47e4f1bb27d1887fb477e86e1075474eb7091d0e77da287. 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/ATAQ71900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8ebc4d2817056a7170bbb3802f5eb543d6c70942a73e9c188dad8bffa026a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ATAQ71900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e89750cc3ec868669b598b27273b8a944063235cff6698a3caf8d0e47c67fa. 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/ATAQ71900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc965ce7bbb12e189f93aa94409a91ba508965f20833d8f187401c66360aecce1. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEZ522100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dac7583d079fe537f19a003509a82c06321a47e5279fbcbebdda35b7a3f1fc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ATR981285597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f976ff5d187f813f0951bab17e93e6082dca98eaaa3dcb6951e66bda1ad8931. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ATR981306835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dd041f692616fb31ca94100dde4e2084114aa07fb8456c0d22d73f3231865b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ATR981336853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99802763f93452d69d8f1fa9d9a2aaadb37137806499fc7afe25af35dd5e20b7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ATR981338174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8577344bab6f04853b543c808d31ff2a1cd7edbcb57da249cba58c67ffe0a919. 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/DEHK91994632.