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 0x9e2ddf31466d9f21ab4c10216930b1b39edf249b8a95520383fdecc319e8ece7. 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/c24f135d-79e8-4a9a-a4af-6381cc85b4eb.json and https://artists.proofprofile.net/proofs/artist/c24f135d-79e8-4a9a-a4af-6381cc85b4eb.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 0x791adc04851ad54f62e34dbad064d738bb1365a829e1bc0ee663889248276026. 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/FR6V80771327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22e3e311e4f87191b624bb0aeccfdb3ef6d506902166b4bb12277ea1ee66ab2. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR6V80771329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d5cf1276e0ae68a4cfccfbd086327f3c1742b304b3ebdddab6ad8ed0d64159. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR6V80771331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899e652f07a7aaac4b0e61a61781f5959e29066e009e75ceaf604b9cefab2933. 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/DGA082299248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbfc3f863344bd215d386460227dcf02e2433d239882ce98c877593d842b129. 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/CBAUX2302314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3eb73ce2492c86969971198eff1de30a8915070c574271814d76c0a3cbb09. 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/CBAUX2402728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb8966bace1b9e02c99ec7d0015de19086c2bab0aa1ded2f25cf356b12b5b65. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRZ111500799.
La Darude presents : Tekno Kawaii, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03819988c27e3185bb6da7c30262e57fb3a083d233a07c3dcef35960f31854f6. 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/FRDX62209230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7a927c8faf11a6c781ae7c3ea920cfc44234b6938114757751ca9e4053517. 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/FR9W12348139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e975250a1a256c71ff385f47cb94705df8d3b3f6a0ee9469f5f9d8255222ae9. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FR9W12347597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7939030f64a06eeb1812227e27b0781ede27692d330fe429df2f7e516414be0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR0NT2003060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb2484ef662e555bbce825d9ce923b79620d8a9b58f9e1b7d057b7b8036c6ca. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR8Q11500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b7f039676760f7979a5745496ec800fbad7eed69ab783e0dce05da77b31934. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR8Q11400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c75651d389e203eddbbc17cdfee6d5c10521d915bc3f349262c8ae2421adf12. 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/NL8RL2415259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34ce8ed679f4e30afdd64ba4eb09fb79b581c005e1d35645ab03f79e651c6a3. 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/QM6P42110639.