thumb|Cadman in 1919 Charles Wakefield Cadman (December 24, 1881 – December 30, 1946) was an American composer. For 40 years, he worked closely with Nelle Richmond Eberhart, who wrote most of the text
{"copyright_id":"0x5ebaac9ef8c8c5ebf3739c0ffce461dbca83cde0f2adddcd924048327a17fb1a","name":"Charles Wakefield Cadman","registered_at":"2026-06-20T16:43:57Z","symbol":"NIM1659608","token_address":"0xc434fa2627e0a10e1d6aeb9b1864680c027f5f0b","type":"artist","uuid":"bb2b3eb8-55b9-45aa-8505-61a33cffc319"}
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 0x5ebaac9ef8c8c5ebf3739c0ffce461dbca83cde0f2adddcd924048327a17fb1a. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb2b3eb8-55b9-45aa-8505-61a33cffc319.json and https://artists.proofprofile.net/proofs/artist/bb2b3eb8-55b9-45aa-8505-61a33cffc319.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cadman: Piano Trio in D Major / Violin Sonata / Piano Quintet
From Wigwam and Tepee, Op. 57: IV. The Thunderbirds Come from the Cedars
From Wigwam and Tepee, Op. 57: 2. From the Long Room of the Sea
From Wigwam and Tepee, Op. 57: 1. The Place of Breaking Light
From Wigwam and Tepee, Op. 57: III. Ho, Ye Warriors on the Warpath
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 0xf59d201abb18f3a3aa76010b398360062b74dddf5814901942cf1b243528193f. 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/USAR29601138.
Paul Robeson: Songs of Struggle and Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bd41d5d230d079a01fbac1dbe5f27ec3b825406a3d6ce0440bc87526fec0c3. 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/USX762041614.