The Philharmonia Chorus is an independent self-governing symphony chorus based in London, UK. Since its foundation in 1957 the Chorus has given over 900 concerts and made over 100 recordings. The Ch
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 0x7d7b2c83bb388d38b9b351ca650090f8eee934e05b25c35abd579a10b45c0c40. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a9a8858-e9bb-4caa-904d-b4028fe1dcea.json and https://artists.proofprofile.net/proofs/artist/8a9a8858-e9bb-4caa-904d-b4028fe1dcea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hadley & Sainton: Choral and Orchestral Works
Klassik 100 Meisterwerke: Klassik die man gehört haben muss
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 0xa7e34f0e23aaee1bc8110e82fb6d1f7fb4b79dc48640543625c3fbb6b841ffa5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC8501542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e34f0e23aaee1bc8110e82fb6d1f7fb4b79dc48640543625c3fbb6b841ffa5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC8501542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3827e12f2799d11deaa83e448bf08a976fae512c8a1b06a805176f18d8c2749a. 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/GBAYC9701010.
The Classic Experience - 135 of the greatest classical tracks
Lehar: Die lustige Witwe, IFL 12, Act 2: "Nun laßt uns aber wie dahein". "Es lebt' eine Vilja" (Viljalied)..."Mi velimo dase dase Veslimo!" [Hanna, Chor]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19094a3c1e0000e5f1cb704b17eddd88fa3da417002ec8fa98726600e8c8dda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC0001010.
Der Zigeunerbaron, Act II: Entrance: Her die Hand, es muss ja sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5154af0417706be809414ff14e74a88f163b216e9442b5de2ba776f5ecc6bac3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEAD61402502.
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
Die Dubarry: Ich schenk' mein Herz - 1999 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3330b28d0bcb71fe6461d96437a815818c7acbd708e8d07c6ca67430f6005b52. 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/GBAYC9801364.