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 0x7a6fd31be36e3e8cd5b3041e3321b71e357e2b81b9f4d33a9ca1d0ec4ad37d7a. 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/a0a16a3f-41f0-4d0a-a8fe-79ce2f3c76db.json and https://artists.proofprofile.net/proofs/artist/a0a16a3f-41f0-4d0a-a8fe-79ce2f3c76db.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 0x8dea3154c51989d627bb3893aea0922ad01bef4a4f64697e18d1796fcf6805ba. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDHM0802852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40894499686333a06e51b4337ecb21ff78bb4e8881265499737f3e98d73f45e6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USDHM0802853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7dbfd59bedae48809cc74f3a5ec5cbbdcbbc4742016308dc760bd2e2d41e91. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USDHM0802871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62672e688afdb5fbc175b20deaf110e41fde95c7663ca29ebbc9c07f0029a155. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USDHM0802879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8d98662b6fadf260e15e224c4aebf99341f2806ad41ab9bf51c66704be9144. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USDHM1315350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ebbf3a18b013b4d3228ed2b0bf59f8e46e76b23379552bc8a0f4519d5b0e71. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USDHM1315353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f967859d3c5130a6048180c59e7d4ec530cf97ff615e94d64958a812670ccd. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USDHM1315354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de85cd4f3df9dcea8a7a9510b82e595a87e7f49a29600c41936c20e2a7ea71. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM1315359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07f770b821e187ee8f78f916f91e91622e5c714867e996a873326ff943e9d48. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USDHM1315363.
Do You Believe What I Believe About You?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed1a6b3e4098a775ad9f2a8a3a2a62a310559557b0297ceca5b7c726d04ef23. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USDHM1315364.
A Chip Off the Old Block (Remix with Extra Chips)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e75ba113f15e79d5c323fc7ab48f7a81fbab4bea83f66b80d7db521d8936f3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USDHM1715224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701347432a11a7f0a72f30924acb49275e63d275516800579c11c8ce0924f216. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USDHM1917095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4168b8c93932127e0e1de3d76a2cd54a2e17a9c56403bb8bee4e93e391589000. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDHM1917096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2698c4ba86cff925af5a2d82003d1e1fe7a3d8721d1eed8e6181856dcbe31cab. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USDHM1917101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b418e2e2215526442a5ee8478c47f702a7544b2055e1aa420bfe6783dd41fda. 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/USDHM2207466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3828642d33dd16bb4894f172467668587dc574f41fc551285b33c7c055369a98. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USDHM2207467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c035607fb0ab1a44aaff007d4e60acb09a59df204aa301de5c69ea76395333. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USDHM2207468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6908f4e5de8eacdf968a912ecaed5509fc0d364210330c290d22e11defa936a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBBTM1011421.