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 0x3feeef92c88f7d06365691947fbb6ad532f2de0f30670f7503646d45fe037995. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/756c44cd-0e5b-4bbf-9fdf-e44f5718d770.json and https://artists.proofprofile.net/proofs/artist/756c44cd-0e5b-4bbf-9fdf-e44f5718d770.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x5f875555a93dfb067f06eaf68e3f95fb6c199ec34b0e0bc3a3bc645e1b0a3c08. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRS181404913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718b94c20db3b091ac04dd69b17238bb5a23a4b9ace09c8f4858f67a087aa8bc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLGL0942724.
Shades of Jazz (Louis Armstrong & His Hot Five)
Potato Head Blues... and More Hits (Remastered)
Stuttin' with Some Barbecue - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d2d8625c7d182797ed20d91f5b7607de3175c1e5d98b8e471b52251d33da98. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ES6601704287.
All that Jazz, Vol.10: Louis Armstrong – Young Satchmo at OKEH (Recorded 1928-1931)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d18c6404f6ee4bc2ac71e6990080b10fc0b255c367b72be25741e47d81ba673. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEL111400896.
Ken Burns Jazz-The Story Of America's Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1079c4d3139fa453928b624d127b5cb75153df6642e8ae1ca49c4f48350b8c16. 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/USSM19927776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc280674a48d5c94cde5646f1ff006a6473693d1550e626fed95fa7e727846bed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM12800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a44056628f012bbc2ca5bf20ad0ab189028a5bfa83516637ef6c5c721a287. 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/USXTN1073750.