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 0xbfdc61a35131cbc46f9843a61118fb15e3d341c64dbbcb99adfc5ab81a5222a8. 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/66ecf420-a67f-466b-a4f7-6e8dabd702d6.json and https://artists.proofprofile.net/proofs/artist/66ecf420-a67f-466b-a4f7-6e8dabd702d6.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 0xc7f2de12a833d221d9763c15b36a7a8d61a827a01ffc33cbc5ea2a50cbceacbd. 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/DEPI82211956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb029ae48de7d3b07ad7f8b699ae92d09e51ee513ff4bf71ee1c747bbf84ff901. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBMJG2410852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb332a7fdb8fa9962d762d05b5717cdb04e7af8f4196a79e93cb8f70d670385dd. 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/QZTBF2431555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ab1eda9ec0d342b19991a38574ad84e94427ee678183dbc43bd4c99438b6ff. 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/GBMJG2408764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06871ead4aac655a25d856b41f6606a4a8391c88481dd76a451526c241c2fb4b. 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/DEPI82215126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6ca7116d12091d16f99b92d2ca5ff1e4a039cd20f97d0c828cde40c51e58d7. 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/DEPI82214956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a55b010abae5156fa33818f9accc3c6db352b7263c4c96190f5f7ddd3235a1. 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/TCAGG2228791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693084c7882fb31777fc263764e158411d7971cbd382d7f339a75c1aa49cde7f. 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/TCAGG2228872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefa8ba9cb1b224769654ed4f5b32467b1c590da5b352b4e1796db65e7081e2a. 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/TCAGG2228961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569fab9f4208caaeb13e5c0f23bb4b77eab259c43ef45a5450eba026726d6241. 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/QZWDW2492528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ab1eda9ec0d342b19991a38574ad84e94427ee678183dbc43bd4c99438b6ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMJG2408764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993d92ab761d7f8208c78d7ce25663e6f58fa2f1201fddddca4166ebb85f32a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDW2210044.