Class of '99 consisted of members from notable rock bands: Layne Staley of Alice in Chains as vocalist Tom Morello of Rage Against the Machine as lead guitarist Stephen Perkins of Jane's Addiction
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 0x6391eb502173ff85ce336f638118ea5a2caeaf5ec25d40bc9da33649e2703bd0. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a.json and https://artists.proofprofile.net/proofs/artist/7cd98a35-581f-4701-b0ec-6adfd40b1f1a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Another Brick In The Wall (Part 2) (feat. Layne Staley, Tom Morello, Stephen Perkins, Martyn LeNoble & Matt Serletic)
The Faculty (Music From The Dimension Motion Picture)
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 0x3cf7ce46b30c3c621aa6cddeb224a4db24fea4625e7bfca80487b119a67514ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM19805491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe036013ff6f351399ce804e44aa469d81a8bd07c6c38976ed0495cc9caedf7. 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/USSM19805493.