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 0xff0472f0df2278ff6a6edc7af7ee4c0e697e2815325ab3e5cbaa4ade8a5cd58f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa6abe59-e7f7-48a6-a26d-7f2bea0af051.json and https://artists.proofprofile.net/proofs/artist/fa6abe59-e7f7-48a6-a26d-7f2bea0af051.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Three Osokins in Latvian Piano Music
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 0x84b61123efaa76ace4b7fb0b01a887158c49ff5a6294ad27bdd3cc16c435f239. 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/LVL151707434.
5 Pieces for Two Violins and Piano (Arr. Atovmyan): No. 1, Prelude - Live
Shostakovich Discoveries: World Premiere Recordings & Rarities
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c582e0c5a48b4214a3359346018a75be716fcea8511a02bcaf372bc2600bf7. 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/DEN962500431.
5 Pieces for Two Violins and Piano (Arr. Atovmyan): No. 2, Gavotte - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5075fa278b42885a36f62a091fcdf613007f7b488e40dffa87232673ffc7652b. 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/DEN962500432.
5 Pieces for Two Violins and Piano (Arr. Atovmyan): No. 3, Elegy - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe3f96957e79e72813b79436cc32cdc40630f486619a0c3efc788a1f2e6a540. 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/DEN962500433.
5 Pieces for Two Violins and Piano (Arr. Atovmyan): No. 4, Waltz - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c94251d746b5037eab9887535bed26553164b811f1dadb7157d6fc72914507. 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/DEN962500434.
5 Pieces for Two Violins and Piano (Arr. Atovmyan): No. 5, Polka - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b5fbb58639a5ad2d2d64aef1f87d0f9684d3af61f083a82bcee52a7bd072e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEN962500435.