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 0xf9f6718e039f24eef949949cd5fe219548f166f5e05e77bde46625150e229860. 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/4c25e6b8-6396-4695-9119-85a03ff5f1a8.json and https://artists.proofprofile.net/proofs/artist/4c25e6b8-6396-4695-9119-85a03ff5f1a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Exam Pieces 2019 & 2020, ABRSM Grade 1
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 0x0e8f00cfc47e2eebab40a57b2919d8264f0de58fcf066ef8d9c8997a122a836d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBEYQ1867416.
B:10 Once Upon a Frozen Winter (from Ballads Without Words)
Piano Exam Pieces 2025 & 2026, ABRSM Grade 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1baa5f14351c95070d58ad6c2d409a1f129577f3155803e4bf4f5c3218e878. 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/GBEYQ2454526.
Piano Exam Pieces 2021 & 2022, ABRSM Grade 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e21837d0f6949efaac06522707754f3a706e756d18d3b72961bb2cf85f179c. 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/GBEYQ2031622.
Selections from ABRSM 2021-22 Syllabus, Vol. 1, Recorded from Live Demonstrations
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b9be46c9ea584be0fa8457973515c122986042c70d6639066d6aeba8edc425. 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/USL4Q2082316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b31ba953a7648295bcc92b1eddb4d14da29c3e34931de033724aba18880995. 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/AUFFF1700137.