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 0xa4b7dbaca57138258186a9614647476d0569306717f3d1a6fed6489cec44dd63. Chain 2 (Bitcoin): anchored in block 953941 (2026-06-16T11:51:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21707cb9-fbfa-4805-bed0-9cb1ebc947c4.json and https://artists.proofprofile.net/proofs/artist/21707cb9-fbfa-4805-bed0-9cb1ebc947c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Salute to the Count (The Basie Band Is Back in Town) [Arr. Chris Brubeck]
Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
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 0xc925dc92fb1d1aa6b41ec9707e64f8bb96801ed033d82cae5c13aacbb6172d0a. 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/GBDGQ0001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885298c3e28deef5ee7e45ad34ab3e67d30f4306a5a1a360ae6a342fec9d20d. 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/GBDGQ0001106.
Brandenburg Gate, Revisited (Arr. Howard Brubeck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071368f1738cd74005c69878631e4ebcb5c226a0c55a0c3b0ca76ecaa18ae407. 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/GBDGQ0001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6dad74b40b3037812a9e7eb2e92f1785894680040abe05d1bfb6273588c778. 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/GBDGQ0001108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d338ee06291ec768e8c7737d77142c62fbc6e3d7a1f097ff7484a0b675c51a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBDGQ0001101.
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
In Your Own Sweet Way (Arr. Howard Brubeck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c76f83bd8721c49573fb35bbe7322f396c3014ba34a3a4641fee437866c80e6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBDGQ0001102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad3d20d43cf2e964f44bbeb3580e2a2d60dbfbb50f2ba342fa8908e518ee37. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBDGQ0001104.
Blue Rondo À La Turk (Arr. Darius Brubeck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e37f298bca1e5ffdf35634e6e8fe382ba9b6aa207550357be8350fb9299ac7f. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/GBDGQ0001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6226c8ff1c428c24d3f7a53839e17bf4a258a138f4bac3335bbf3b9b17672cb3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBDGQ0001109.