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 0xd8a5200aa2e0d91a84f12cf29a4114d82cd0039083c03523653c31ff672c3782. 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/35bc120d-88c8-4542-b4a8-5fdce2dfd77f.json and https://artists.proofprofile.net/proofs/artist/35bc120d-88c8-4542-b4a8-5fdce2dfd77f.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 0x2b251069c56eb68989e269e612ff989408c1b599193829a6f2d3382eedb778d4. 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/RUA1H1866886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cb488cb1299e2aa5b26dcb668c5aa8e7a2f89b799b01941fc708e15ce76fb4. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/RUA1H1866887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb669e8023e63fe1351afb8b203c784401ed9954205feebae581cd1c238ffc3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1H1866888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf7238db777096b5bb8b8cfbdfeaff9ba7129edc13a28aa9585fea0f45d1a27. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUA1H1866889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f969aefaa71ed1e70d68695f13415bdcb3dff85ea6513272778b14ee95303f1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AEA2M2115378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b4bd8e148b4494266ce610c81a160a2ff35462b4706fe191fc565cc10ecb5e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZW9L2215355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc534aa466cdbe1264f73ba15522024a1f4552f522810223d638dbdc494aa381e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZGLM2381364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4cc48917c5c9fc1498c74e110086239f326ade64e4bf3d7dded437060e3700. 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/QZNJY2371329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82df5b74ef86bab9add314eccbd2967812667d5ff5fa5ab4076c9a30982a7eac. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/US7VG2474606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7d58048524d10dc3cbbc23ffc85fe962ae5fe6929f621597a284f10cb3eb5b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLM2475068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71130ea55c8ec1f22656a53b29b2d4aa6d64a37921dedda47b4f7a5a314da2d4. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/RUA1D2481166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfda169f7e1b181e8ef55d3082056bc25f8da8d354075a39138a41bec3b0f75. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/RUAGT2455995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694dbf3680425cb9657bed7c1d1c0deb66c3c9e288012ca4f9cdbea81799903e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAH62413714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abfc2d340a76494692b3d835ee9480e15024c4c674040f634f88c7bc021ce41. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUA1D2538180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0058f4047b357b0d8cae7e7c64c176b620a21a5c7f6ff905703d34a67e148eec. 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/RUA1D2576119.