Peter Adolf Serkin (July 24, 1947 – February 1, 2020) was an American classical pianist. He won the Grammy Award for Most Promising New Classical Recording Artist in 1966, and he performed globally, k
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 0xbb55fd97ff8874566d8115bb94ca711ad58ba6ac4fc104cb2627deb781fe3969. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a319a10-ffca-414c-9ce4-df5041b207ce.json and https://artists.proofprofile.net/proofs/artist/1a319a10-ffca-414c-9ce4-df5041b207ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
8 Lieder und Gesänge, Op. 57: VIII. Unbewegte laue Luft
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 0x809d658382a1805272a7039c149295d8f8503013e4b658243c8b1dd3cd0e2e1b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM10450001.
Trois chansons de Bilitis: I. La Flûte de Pan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2bb48b18264debf0a487edd3da7c2d694f0b2d63e7b4dd76a03cc13d3c86ce. 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/USHM10450007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add7e8e9769663f7b3d1ee5899204f37e7cfd2f979538929023a859ae29a38e. 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/USHM10450012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22eb5a004668e79583f3917ad54f2dbbda4dc5a0d915ac8498c60e0d449b80f. 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/USHM10450015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd556573926cb651c86dc68ab30a993ad0111d684e0deb46c2b31061b331f029. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM10450016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8584423c151c7fe050179a659221c0b5dfdcab835edd65ee3bcc4a0af0e3f4e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USBC10401970.