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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a847f900b0494ff7049f614e508fd074aeb340c1aa06d12fc50270f4b6ac662. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4aa84071-43cc-4699-b326-00c678ad468e.json and https://artists.proofprofile.net/proofs/artist/4aa84071-43cc-4699-b326-00c678ad468e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Heard You Cried Last Night (with Mark Warnow & The Hit Parade Orchestra)
Selections From A Voice On Air (1935-1955)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295d3b704ecfa9e6964e11f60a0f43c45d5fbd32ce681388d3a9c65d2d531a0a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQX91502607.
For Me and My Gal (with Mark Warnow & The Hit Parade Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25414149a96be7c13a5c061e9fc28e126861bec6aeaa1a16853449d2ca00bb60. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQX91502608.
Moonlight Mood (with Mark Warnow & The Hit Parade Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57247b811a2cb54e6cb3a39852b2878e6014689714283d1f26e9d1e01182adc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQX91502609.
There Are Such Things (with Mark Warnow & The Hit Parade Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6385132b3616bd8311df517c7e75c6ae2f039cfd5f848af159f74622d17cc23. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQX91502610.
As Time Goes By (with Mark Warnow & The Hit Parade Orchestra) - Rehearsal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84feb86b03e671a008de566377e5c21070cc85b52ef66136dd370b97c12cac03. 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/USQX91502615.
My Heart Tells Me (with Mark Warnow & The Hit Parade Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423a7bf2426c1f0309ae8fc24f06ca799d3dc078c78aee02b58f88efbb106745. 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/USQX91502622.