The Downtown Fiction was an American rock band from Fairfax, Virginia. The band consisted of guitarist and lead vocalist Cameron Leahy, bassist and backing vocalist David Pavluk, guitarist and backing
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 0x0c3125d3a8702951a632edfdc22f5b9a0521b51d28d57d7156bee7cd138ab2f8. 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/30ee85ca-e3c2-43d6-b49d-0374eab27ed8.json and https://artists.proofprofile.net/proofs/artist/30ee85ca-e3c2-43d6-b49d-0374eab27ed8.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 0xb6c1fa1b00207ea3155116d3a8e679ed1c65b584971eab5e974aacf289f1b706. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAT21000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9744359e52a96884a2cc5a2453badb54f23c1690ee91af0bda0f29238398b4db. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:03Z), 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/USAT21000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa7b3f93cf941a15fcd3dfc1ad80c0ab929ebbc63c9051d929ac15e850ba10e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USAT21100636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38378003f88a9dafc98b4385ae83fe4b05e4fae50cfe69ec62c19856497464. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:57Z), 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/USAT21100638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda52c6612a4da1d6668a723d27dd49e101c1b09d246c2c43c2316bb01b9d67ff. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USAT21100639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8bb4dc56c12c000a5c76bde14d185a874558c45679a55f2151326ee6f8bcb0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USAT21100640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce4ee562c1a30e96c03c6bec4c91b111df25499e66f69dd108a3b76d96225a5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USAT21100641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda708ff613b7cbffbcb3b0e8425a843d627073dc0038df52f5ea467d037a4cb2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USAT21000239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33955d3714d55bdcbcce98e05240bdf805b8b914ca4308eac2e283c3fabd9aeb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US5261318999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdbe29f610eb0ca0b228559261466191b24501e50765ba516e60ece7ce70ada. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/US5261418908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6671e9c007f599c0732549fa2e57b29ca73ef1b32fe3928dfca3fd9059cadf8b. 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/US5261418902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b06a8346c629340aa7330313253664bc8b485c2bbd644d4a6a0932c81c54f6. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/US4K31500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156cb3d60b815d602c297457a2e46c498d407fa4cae5df6cfedb8e2a0a57bc72. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USAT21100694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487a251b5cb1854b9061f466a34bf23efa30d125ff7e3a9c7c387f52665c3e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USAT21001869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487a251b5cb1854b9061f466a34bf23efa30d125ff7e3a9c7c387f52665c3e7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT21001869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ddbc2470fbfa9fd2c7ef710c7e966539a7c65e867aa2ac4504ea0170887dc3. 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/US5261115913.