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 0x6f0aca10debe672c9fe550d7dded9c1a34598801353be32c23beb6dac4081039. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4f2e8e0-88c3-4552-b78a-28bbb6d3854c.json and https://artists.proofprofile.net/proofs/artist/f4f2e8e0-88c3-4552-b78a-28bbb6d3854c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c396f3facce3e6aca0fbbf9ca5bf6c5ee25460904f99142717a957ecaac98. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:29Z), 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/QZHN31901487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35428f7b8c65da796131a388c0c9e51d41f5fb9bcb59504b35c24b2b22343ca6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FIMRR1000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3a9187bf9856941d27b0b2efdd58b4ca90036c513faa51f7a6418ae210b905. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FIO211600601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c4940e1cadc6791da7dc077aa7f1f9d92a71cb6ec2962b29a60b00546c4c5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN92008598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baf061e04657a3d2f1ff56c6ff04982f6acd40ed9d1ecd16b69de3656e9fe8a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:20:01Z), 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/QZES52172620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d52a1de677cce52d135e5595c8126551c5d5bf8b2b47497d359f11ac74b09fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:17Z), 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/QZHN52226712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da42513837c449ed3b8b81bd906110d0b5e69859c57663964124dbc985a7483. 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/QZHN72376230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f0f07e529194f6482f10b84dd6e26bffc2cb6851fe4fd0ec0274162d9585f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:25:34Z), 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/QZDA82470231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0407b7e41178658b1d4bf5d4a880bc760a30bbe8ce73f70459eaa8ecdc4cc4b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:11Z), 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/QZNWW2469040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62d33345167607c84116d6198ec734975ad22b18b6908624e74392a983907ae. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTAY2461888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca355d659ee0bc0c1d72f9b8e122e1f96f354aa08b851ed2a98b1d818f99f0cc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTB62410809.