Willis may refer to: Places United States Willis, Florida, an unincorporated community Willis, Kansas, a city Willis, Michigan, an unincorporated community Willis, Nebraska, an unincorporated co
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 0xe91dc9fd754c496439aff8bda13fbabbc65fd59e6fafef2990b1b5f4b3c73e0c. 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/f8e4a27a-6b0c-441d-b44b-ee8737e524a3.json and https://artists.proofprofile.net/proofs/artist/f8e4a27a-6b0c-441d-b44b-ee8737e524a3.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 0x1be134ee9c56552b45dda82eac2214bf59490db7990c8a0fa6dc9b27f64c2923. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21525989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17111338506bf97197dc42260b90472b8292f218cab7159b8452438d8347ea40. 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/USHM21525990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca62d3095fcb357e13da3eb27b362de05cb3f67e0cd3fe282befe302b9b20c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:27:00Z), 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/USHM21525992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88ea5dbdfec3ac429b697dcfdee1e301f7e8cbb0b6e7f7274e4efd76157b3c. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:37:45Z), 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/USHM21525993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e439872c4e3cd4a04cb4766a31f0548798eb2bad4484c9fa6013322c5c6d9. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:22Z), 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/USDY41646846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c70a5fd5a17f65bf826e33768cf50ad8059bb85cfa3234567bf4d211a9b377a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:37Z), 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/USDY41841555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251b8105821afdd0756fe790bcab45387b1a14cc2562d5373a8c284a2b30006f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN52599831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44146d90e99160c26027d458c3f89f21a9fb4599b751317a1d7e9f68fcb9f6f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB62535526.