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 0xba723c551e30d63d29e252400f41c50fb82d7ac232bdf75b5f5446616d62c87f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ebe0ff3-8bd8-413c-96d0-1227c8f56a17.json and https://artists.proofprofile.net/proofs/artist/8ebe0ff3-8bd8-413c-96d0-1227c8f56a17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphonic Chocolates: 1. Caramel Chocolate
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 0x1fd6ce3f1ce6148ca6a8e7316fae4fa03d4e46703975eee039ee2d491bd2c1da. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM21946236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc60dafd93929536431d288f3d16bdb4533202828554377c4f5a53a568584ab. 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/USHM21946238.
Symphonic Chocolates: 4. Coffee-Infused Chocolate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43c091ca4069f8cc222f110578262e4a5c2873c8093cf35f27e7394cfa5aa37. 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/USHM21946239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb27ad8e2499545d239af97cfa7026fb811380f55a6109b418c603ceeb607aa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM21946237.
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
The Armed Man - A Mass for Peace: XII. Benedictus (Arr. Robin Hoffmann)
There Is a Place (arr. M. Cahill for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2928fa91210583307d1f95ab9d62bf45e6274f730f974d50c9b1699c76ebfa50. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/IEBV01400008.
The Silence and the Sorrow (arr. M. Cahill for orchestra): Pieta, "The Silence and the Sorrow" (arr. M. Cahill for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdcca2f0c564d1b196a2ee02a7e07b2d6bd651d8822daf4bab167997a4a88f1. 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/IEBV01400007.
The Voice of an Angel (arr. M. Cahill for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b722eb3aadea6307fc7a4c60916ccaf40ace1a82646d5e8c7da2406dcd8b31e. 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/IEBV01400009.
I Will Be the Vine (arr. M. Cahill for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2437326bc2696218743ccea5ff1e91b913796b25ce7cd47587637424b7f87a2f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/IEBV01400001.
Far Beyond (arr. M. Cahill for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9f0d1dcfcfaac686d4d8b81d9ca6c65fd13529d9a78aedf7151d0fb19be830. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IEBV01400002.
In the Quiet (arr. M. Cahill for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a17e192f594e2e0f101a6885213d330aa643ec1f40acb8e111d6745662b019. 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/IEBV01400004.