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 0x3b46ce28d9013c858afb8aafdfaff1bbddeac009eba5da9168df7704d85c86e2. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a502914-7051-4a06-8bf1-094b95bb2843.json and https://artists.proofprofile.net/proofs/artist/1a502914-7051-4a06-8bf1-094b95bb2843.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Turn On The Heat: Hot Dance Band Sides 1925-1931
Sam Lanin and His Orchestra (Red Nichols, Miff Mole, Rube Bloom) [Recorded 1925 - 1926] [Encore 1]
Sam Lanin and His Orchestra (Red Nichols, Miff Mole, Rube Bloom) [Recorded 1927] [Encore 3]
Sam Lanin and His Orchestra (Red Nichols, Miff Mole, Rube Bloom) [Recorded 1926 - 1927] [Encore 2]
Sam Lanin and His Orchestra (Red Nichols, Miff Mole, Rube Bloom) [Recorded 1927 - 1928] [Encore 4]
Sam Lanin and His Orchestra (Phil Napoleon, Tommy Dorsey, Glenn Miller) [Recorded 1929] [Encore 7]
Sam Lanin and His Orchestra (Phil Napoleon, Tommy Dorsey, Glenn Miller) [Recorded 1928-1929] [Encore 6]
Sam Lanin and His Orchestra (Phil Napoleon, Tommy Dorsey, Glenn Miller) [Recorded 1928] [Encore 5]
Sam Lanin and His Orchestra (Manny Klein, Tommy Dorsey, Jimmy Dorsey) [Recorded 1930] [Encore 8]
Tin Pan Alley's Greatest Hits, 1922-1929
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 0x3cf1cead2c0c8015a138af3b18c3a406d4c7e9249cc9f5564b351b5a25e7c41d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCXG1300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a675d779348c7195ecb87b7b3afbe1f0c69518f9fc165d539afac41520475d. 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/USCXG1400758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491253bd55644f833c272b9b55228a84642ecb452366052d4df1dc6fe22263c2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USCXG0800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda29042ed4e0adae1ef9974542e9bfea7ba6df81c3adb0a1b211975bb3addc87. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCXG0900449.