Otto Moritz David Goldschmidt (21 August 1829 – 24 February 1907) was a pianist, composer, conductor and educator, whose works included a piano concerto and other piano pieces, and an oratorio, Ruth,
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 0x84fbb6b12b51a77cd205ddef4d2883ddfbe33d97abcc5158a0833bac7a5de070. Chain 2 (Bitcoin): anchored in block 953950 (2026-06-16T13:35:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24d950a4-2550-4c6b-ac63-f3e942354374.json and https://artists.proofprofile.net/proofs/artist/24d950a4-2550-4c6b-ac63-f3e942354374.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christmas at St George's Chapel, Windsor
The Choir of St George's Chapel, Windsor Castle
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 0xba0688e3491329af026b050e9d79dfdd463522a4d46cfb00ffb86bd09b91501d. 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/GBAJY1928101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2484a2c1190ae86686fe959e8a104e8b35ef27e1ead21abc66be332ccecab3. 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/GBAJY1928109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a3014838035c1ee1209a7435566207edfd6a103d90bc83cb31670c3abf6135. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAJY1928114.
In the Bleak Midwinter: Christmas Carols from King's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd8297011601c83ad44efd3511d2baff2d50495cbb51e3a128d06aaca98ae7c. 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/GBMY52106002.