Sincere Engineer is an American punk rock band based in Chicago, Illinois. The band consists of Deanna Belos on lead vocals and guitar, Adam Beck on drums, Kyle Geib on guitar, and Nick Arvanitis on b
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 0x37f91dd045942e5307f51dd2a95dee1f08a4809709058497320756bfd4da3c73. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da51ab9d-b2ba-4d5e-9498-b5f0ca8f66a7.json and https://artists.proofprofile.net/proofs/artist/da51ab9d-b2ba-4d5e-9498-b5f0ca8f66a7.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 0x2fae6ca7fdded1d0081258db910353ce32d524b90c0d0e8f34995410464aeca3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:24Z), 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/US94C0520406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9b5d0add828283ef806741659a14ec2ee55645e2150a05c7be6339477e580c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US94C0520408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd560fb58a1c07f1f3058dfcc8f0a69f09b76ce14d624b416b4b18fe0d59c4e1. 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/US94C0520409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bce6a57d938398489d7eefe2b09fb4575518aa4fcd6bba3cba77431f66b884d. 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/US94C0520410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37741a477c46eda2ec5072142e764a1d00c1bb21bf286f6a500297f43edf13c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US94C0520411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3372413d1f7aa32f2c90ea2ad8ca7545c6e1a7a9ed8544538f605d3fbac1f43. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/US94C0522202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa726f37ffe9e79918774ddcbfa16879c75484a5b1df99d9bc47a57a8874bf581. 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/USHR22113804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf074e2a0d19f3c625d621058277de9234bcad9566218aad6cbada43c30ec3ca. 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/USHR22113806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed482ad9ffce708e93994c7086c1d84eb2f7805964a2c219f37a1326eb9f05c2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:39:58Z), 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/USHR22113807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508fbe1f602cea3d337dcc35044b342081cbcbafb4ede053a722899119b25e6e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHR22113808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539edc4c0cdc162a730e3298ccfcc9ee21866725cc5e7a48073e376b2dbf0c81. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:49Z), 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/USHR22113811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26073b176e71bd3ab7fa223df34d54a982e04cef8f55e6ba72722cfb9ade4ab7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:12:04Z), 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/USHR22213801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fa1c53fdf337a5dcf32e07fb778b85a66c5e8b742edbfbd0930be95d561f97. 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/USHR22213802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088f1dc3cda2ab77872f86f8a57d08605ce08ca2aa4938e51f5cb8fd4d9c659a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHR22313805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518010dd23cb788753b8eef0073e032a6f47ac32e7722878be560a529e66b6db. 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/USHR22313801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf738cfe7f47144ec961c500916f6ceeb7924ded10ac4e3137159987eff9a7f95. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USHR22313809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2057a0057ed35cc79eeb3b624b858fc98a8d19018bcea1792f15dda9d19b66. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USHR22313811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba55c7a022c4a682a616b1f2bb6d1b8990e180bfeff1d206fb2894b8bdc5935. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:25:42Z), 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/USHR22313812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea89ffc7af184a883f813d8ebe208e24478e053c5a991fcc988629f0114a5785. 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/USHR22413801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8c26debe8d00c33f86bc1ccd4f1f4d73c7d0ad6a5720d61a0a3f59a8435f4. 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/USHR22413803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8c26debe8d00c33f86bc1ccd4f1f4d73c7d0ad6a5720d61a0a3f59a8435f4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHR22413803.
Red Scare Industries: 15 Years of Tears and Beers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3372413d1f7aa32f2c90ea2ad8ca7545c6e1a7a9ed8544538f605d3fbac1f43. 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/US94C0522202.
(Not The) Same Old Songs: A Tribute to Motown
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b71619880e4b3bdff0f80e430345662e5adfd6895364da32d04f05d8565bd94. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGJ1603643.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch