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 0x923780b37c20915f90574da095689270bbe0125e081bca0463be59d4b39db811. 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/25981977-5b65-4383-8956-1792ee7b79ca.json and https://artists.proofprofile.net/proofs/artist/25981977-5b65-4383-8956-1792ee7b79ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pange Lingua Gloriosi - Choral Music for Holy Week
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 0xeb0e599cc0b9e34bbeae43d0fd98729585a1b68a542e862fc9d1a112bc27b219. 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/USA4N1000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c2dea65a25f5900720f7da101637a3cde4bf0031e366f5b9715aacf00c28a5. 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/USA4N1000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34310a70c7f9c10087f021f1fd3dda023e6aa2be1951a7e212733b19052ff6a. 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/USA4N1000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f889d082adb2170f18541236123ae979eb9dcefa1466b571ca984b2d05e86. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e3919c6930f617f91a0e398d67ac8a5611fdaa808440fccb243beeeb54a3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfbb3e6f390eed2b504f26937abdbf16ce6c8aa40545de49df976c863f60551. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9558c461e702948f0377c713ed96955e0a6fee049a5a740a80b443814eb27627. 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/USA4N1000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a9e9b3bc446478a1a569ff9edd4891a2f094652431a33db3efc617a020710c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:12Z), 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/USA4N1000291.
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 0x9887f71bd3ae290715584628f866049b2fff6c9686501da1a1ebd7f73d8cd0dc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:44Z), 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/USA4N1000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eedd7cac5c1df807b9c26d3b27190bd8873391fe878e8f4c8b79a1768dca1a4. 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/USA4N1000287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b3731953951c7a19f7402954ff5910ee63cda1210f9c287e48d4afb69b4ad. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA4N1000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36912768fdede5e45260d041309d44a43c19c0ceb5eaa07943146b51065d0414. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA4N1000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38ed281ec78a6f366e171968018cc6e3127792edc430377a575ba30ccf68ae6. 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/USA4N1000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86025f1d8cab8e07f3bfbf45d55ef6dc927d5c0b3f481352accd567a69cd60c2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA4N1000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58855a9412817f18fb374409ea941be708a90865c12f75f82f5baf7b9057f6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA4N1000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849950dceaa6c819d43b9ce5cf326b6fab66bd340074a90175bee4a61abab717. 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/USA4N1000298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022db8b9a93d63b0b4d1ef010da8966edff746a827d31853baec42a0093afa36. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USA4N1000299.
The Sisters of St. Benedict, St. Joseph, MN
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08015bc0a5af7c376982bc1a71a0b8b6fc0aa7ba9e937b7fbf60a7e0bca777b0. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USA4N1000304.