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 0x9e4c7678f68f3a8028d8a7f1ea69943b30ee81731462f43649c196bc93cd341c. 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/aeb47c84-46bb-422f-8f68-9749bcef7300.json and https://artists.proofprofile.net/proofs/artist/aeb47c84-46bb-422f-8f68-9749bcef7300.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 0x65669a97c718c82587d3ecdb99f11413b29d4e6afda18c79495f705961516077. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAPG1865496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd512370e8fcac9189a2dc522f7a037e2c2c4874210e431b0bd736aa53031cf7f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYY2110417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef09964ddc56a6825972bf2413b746eda5e3514386aba1252c9af1e9cddc1c6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWW2043782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7e70928e8f8ef773b29e0b8b6bad080821a6021ec27c1f493ddf37e8f2d11. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM2PV1774967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39c79e9fffc9131b144f6674474989990b19cb2559d5c3c314abbfbd478d58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM2PV1774970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8dbc4e2e7d5d0d2a2415b0e0a0affd655685aa3b16b75a4b3a8d634f022f58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM2PV1774971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faa03f08ea71b6de69f8fdec5357910501ee3e41331e9d0411cb225dc8168a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM2PV1774975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0269f9639cd11491c469e2f8b3ba5799db6ccc27da1d8446a03d64f41d4d84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM2PV1774981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a8fd32bd2c71bf9aeaa1bfc2e700094eb0333bb7b65f592148d8b9205369c0. 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/QM2PV1774984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29066b40918a369e2e52dc80a74b0fbe908d7f1b3417a2f6b61c461d48058869. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDA41872316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65476d8985223e2da89e8e05d0b691f1b67cb0168ec7c2f233e96e01212e7f58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41872324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ff38286f8c0c36a1ff5bffe0889caa576ea956fc0050b5e60072790fba85b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA41872327.