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 0x06d455215568c197d5da64fbf34f955288d7819248405136bcfe2eb351d9dfdb. 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/a54d80a8-1f91-4ecf-a9a0-2a6e475bb15a.json and https://artists.proofprofile.net/proofs/artist/a54d80a8-1f91-4ecf-a9a0-2a6e475bb15a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Unmasked: The Platinum Collection (Deluxe)
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 0x5c2b96a86ddf4ac39cb4b1da4912d6fca44cee15cd8a016b325ec91c73e196b7. 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/GBALG8900012.
Cats (Original Broadway Cast Recording / 1983)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9216ac709ab773c56bc09642b7b5ec49f43838c33075adbb6511b4dd5cc12c6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM71704130.
Prologue: Jellicle Songs For Jellicle Cats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56e2ab202ee46f196ee8bb32dccfa23be15c1e77c82a380923aeb80e20967a. 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/GBF068990030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8656d758b647c2b250b837641f7a6185ed076da742e357abc7dfe24e567eafcd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBALG0500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddab4aaf85a0a50a2de634460ada765df059a0d58701f182af0a2bebc36ecec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBALG0500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c0e2b3a32bf493b763b0a0612a07d841704bb8a6f4f6890a1109f84660c49. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF068990032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7769d3796fb7dce0827a07f715cc9d6f414961ea959277ce7dcdb6266c417f50. 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/GBF068990033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271d3f6492c6418e8c4c024fe164ba1eb3f1ca51c61ab7ac01270954aeefb04c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF068990037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d4ac79669a7e05f886675c684c104c2d05b3ca7bee28fc0fa37bca95e8c6d8. 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/GBALG0500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448fa55122ae2d208ee279e160b1e309cff391f4be956b974cb39220ea681506. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF068990034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc0384c3881e456c38f66ac4e241186d67813a81459395ff59dbc65ae6adf6. 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/GBF068990035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6617b3acdedebf5d94b86886d5b05c595377f60fa52d7ae507c55cb3d202216. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF068990036.
Grizabella: The Glamour Cat / Memory - Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda19a7b06195d2aab6f4b7834b2bb1d56c5f108445fff7544d518c7267a1ba99. 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/GBUM70600517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efad71b5daed16675c9dad920f54e24286cc9da0ff74349879d1bd51a4d914a. 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/GBALG0500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1267461bfce09955388add1f8f92f8fa1e680642baf1e1a6da11ef860e0255. 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/GBF068990038.
Growltiger's Last Stand / The Ballad Of Billy McCaw
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69681ec04abd7715279187a4f69c433f8f697e08ecb0d3117d08e8bfa6ccb555. 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/GBUM71704126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bfda05197064df9dfe1f6cf75201b3c18b37e017113933a8f9b2dc3e3e62d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM71704125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9be99b204e13980a20abf82a2d3c45cafe19bb6c207c8b9b93d6e6c529b9284. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBUM71704127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf9d344c33d6796bc26485956d7aa48dfeeb5c2ec894a3add085d2ea1df902b. 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/GBUM71704128.