Defiance is a city in Defiance County, Ohio, United States, and its county seat. The population was 17,066 at the 2020 census. It is located at the confluence of the Auglaize and Maumee rivers about
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xe327218b906c92299e16ffa1de3e3ed8f924f6aa7c4eed7754e1844a59e34927. 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/d8a10e6a-32b3-48f3-8860-f37fdb36c2e1.json and https://artists.proofprofile.net/proofs/artist/d8a10e6a-32b3-48f3-8860-f37fdb36c2e1.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 → block OTSBitcoinBlock must exist at that height 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 0x8b2c92d053833633c62b8cd085d7b98da395483cb95ff302cd10e2318c531a30. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US4KC0721502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8244156783ff9563b92ecc22d2e59596a0e3fed714846e2ee5dfc7c742f6c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:16Z), 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/US4KC0721503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ff0b0b19b8935e3338d0adf11215c5b35a0e8545ab7bed6e4a1935397e57a. 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/US4KC0721508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8119f01c02d95666aad9698e9e1d0d607490cfeac4aeea8aed493c0e7c32e5aa. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US4KC0721509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3544198f29a2eeb09750c3d9e1c9a1dd4942142784b1e06a2a895168b862462. 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/US4KC0721510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc085e03b8d5cf8d870f0bd9aa6552baf05741442ed6766dfea60fddae9fd67. 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/US4KC0721512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85c2d815801c4b08cbc8196da4258f1ddd8bf32d4b1bc65274ea5f38e4fcec. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US4KC0723301.
The Things We Won't Let Settle But Let Set
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf43149d7f04327c927bdbe65c90aa86bb25726a0e6830dc305dac27d8781b7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US4KC0723303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e693a3407d3ad95fab450d5c896ae6107e693b1682b186ba2508e972758ef1. 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/US4KC0723304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1877fa569712a9c7674fb97e6d17ca9fd9039d49e67a0d9e30673cfa668f2717. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:29Z), 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/US4KC0723305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578dde288538b92981024c673838faae134a24f7eb0101eccb7d4fc690c8ed4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US4KC0723308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1a988e2250b8e622dafa4e472b74c163c45f072d4745e4dc208c8c3b5d862c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US4KC0723309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bb620e88ec16dba027b8ef2e1f8e5cc179ad84c95ffbcae2a6488cde23246f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US4KC1028902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f65f4de8e403372348b9c699afbb300a842ec256906c03438210af12072a539. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US4KC1028903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a94349c8544bb1a8640e82fe9394ecda45952dccf491a178304585c9f08bd83. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US4KC1028906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e8260751c05974601f62f64f15e79a87001fc67ca17486cbe9a89e6fbbd9d3. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/US4KC1028907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9851d7ee90e9d66c0b26c3353544b9ca7712b200575ec0ccaf4431cd0c65107d. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/US4KC1028908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafcb7fe55238ed6b31559ebe3fa53fbc3a02450d979856dacde5af4f6946c9a. 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/US4KC1028912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd805d4a492b6e313f1b139bd08fb464a135885e603d5abe066a7f094ec1c639. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US4KC1332701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725860d304ef0b27a899a8d5d99afead02a6ce24828fc057bd536904d2bf0915. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US4KC1332703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2da9f099c548b3333c385f55077efd91a8be8c8b1d718ec9f185fa7cecb8556. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US4KC1332704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a2ad5866477468d3b53ec108b7d7b6fd5bfe3ebe2d3b6d498b32843d7091cd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US4KC1332706.