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 0xdec0443016bf48fcc2248ed4c91cf9b8653d264a575983d87857e09084b4d2a7. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c4c7839-3530-412c-afc2-0dfda405f4b8.json and https://artists.proofprofile.net/proofs/artist/1c4c7839-3530-412c-afc2-0dfda405f4b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bloody Bloody Andrew Jackson (Original Cast Recording)
Love's Labour's Lost (Original Cast Recording)
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 0x6b0e8a8eaca70f553049982bb0056d2ca09442cd121f1fe891e761b4285ce2ad. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USSK31423425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1206a7ede436b3ff3e92b4467bcafcae679932425d1a174ba9c51f3c0e1c2bf6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USSK31423428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65784a0ab1effafbf1ba32f4dc98e0938f0397aee093310fd3ef751351277e6a. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:23:27Z), 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/USSK31423433.
The Fortress Of Solitude (Original Cast Recording)
This Beautiful City (The Michael Friedman Collection) [World Premiere Recording]
The Great Immensity (The Michael Friedman Collection) [World Premiere Recording]
The Abominables (The Michael Friedman Collection) [World Premiere Recording]
Paris Commune (The Michael Friedman Collection) [World Premiere Recording]
(I Am) Nobody's Lunch (The Michael Friedman Collection) [World Premiere Recording]
Unknown Soldier (Original Cast Recording)
Canard, Canard, Goose? (The Michael Friedman Collection) [World Premiere Recording]
Mr. Burns : A Post-Electric Play (The Michael Friedman Collection) [World Premiere Recording]
In the Footprint (The Michael Friedman Collection) [World Premiere Recording]
Adventures in Reality: Songs from the Words of Real People (Mostly) [The Michael Friedman Collection] [World Premiere Recording]]