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 0x31283534635abbbd9252bb3526fedda9cc7243e1e0df05abf75910e4ba7445ac. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b63297c9-33ce-4eb6-9b6d-f772acbfe5a2.json and https://artists.proofprofile.net/proofs/artist/b63297c9-33ce-4eb6-9b6d-f772acbfe5a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fra' Diavolo: La musica nelle strade del regno di Napoli
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 0xd082de2826062dfcd802c1c0f2ce4e599ab6be76505685416f125b5e6ee03266. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ITS661000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef13580c46df0def7b8fd917fa8d6a6190fd83e17446f7e753f364e72365f93. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ITS661000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc957620d44d9b0b9789d03dee43eb2859b740dcef24f9e68cd01130369cbfeef. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ITS661000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2e4763f4cf707d318b34dcb3385c010c2917c1f90546ce646d8cd8db42a89. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITS661000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb279ad903a32a23832ff4d5241d09fd9951d9f64cf7d25b098818f315ab0a09f. 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/ITS661000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e5333e9cc8b4d6ea2cf815391b7f1d892ee31be24818c0d95897ef6510e9c3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITS661000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfafbcc18cfbe6a7c03229fadcf45f06f1bcd6b2752aabcb17d9f041d44cd30d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ITS661000055.
Tu bella ca lu tient lu pettu tundu (Tarantella)
La Tarantella: Antidotum Tarantulae (Extraits de la bande originale du film "Tous les soleils")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeaba6e563010953afd9dcdfb83c814a04462f03c1ad7847aadae0b334f3d42. 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/FR50X0150314.