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 0x82a8550b30e09eae09ff2f283cbfc7e26510d6cf8c9e499a0250801e1de0c022. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5023948e-2b7d-464f-a5a1-3a55f0901459.json and https://artists.proofprofile.net/proofs/artist/5023948e-2b7d-464f-a5a1-3a55f0901459.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liebeslied (Arr. for Piano by Sergei Rachmaninoff)
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 0x1b155157dea069914aa07081fcbb10bba4054efabf291760dc63f72e96d59f62. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEFG22336509.
Dramatic Workshop, Vol. 16: The History of Sci-Fi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a8c0875695b14955d959e76b5f68f9fe635b6d8f4b8f153423152cfc4e8b9. 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/DEB639905501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6915e810cb580c17f7c78f6c7874fce7c4c1cdc2f5bb258da05a1c0a0f7986. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEB639905509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d5c18daa5c4a6c9aa55f167242b203d947822a3c4abc7cba16f3a06fd10b1f. 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/DEB639905512.
Tchaikovsky: The Nutrcracker (Suite, Op. 71A)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89d6951abf1cd60ebba41906122ddab8933ee2f07d945f5218ba8a1cc520e74. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USJ2M0910817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f487bf35d4466cc4b6a2ea8a251cb2551e92914ec1348b78576b8ff83de87dc. 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/USJ2M0910823.
Tchaikovsky: The Mystery of the Box in the Attic - Highlights of Sleeping Beauty and Swan Lake Ballets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd143715e016a5cc6337681c02f16af88a7cd4657e9e06718260096676a3ba9a2. 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/USJ2M0910014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6f56ecfa756d51d8a01d3bdf1e5994cbcc8f6ae2c4f418b5605fe102840ec1. 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/USJ2M0910016.
Tchaikovsky: Romeo and Juliet, Fantasy Overture - Capriccio Italen for Orchestra, Op. 45
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4a4e678c8da3caa8b935e163636d7d1d0724f012fed2dcd23a060cb6ea8f4f. 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/DEB639804101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a0314357d0873c561003e2291e7823f943347f6bb690a68571d1318dd1db28. 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/DEB639804107.
Nature Studies, Vol. 8: Animals & Landscapes