Material Issue was an American power pop trio from Chicago, Illinois. The band's trademark is pop songs with themes of love and heartbreak. A number of their song titles used women's first names. His
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433364b5865023e256dc2c70502596842d2ae2ceeeea9dc9112fff88c226163f. 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/c0f93144-1e0b-4903-8453-6ec54218a7ec.json and https://artists.proofprofile.net/proofs/artist/c0f93144-1e0b-4903-8453-6ec54218a7ec.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438a3553edf9aff1d9ecdf4b75f227ea74a2738e04850ed7daa4dd9e0183d2cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USWWW0201077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d425b2856dbb93ca273740217e6e200f3b1467608ef236a418dc8455e99cd8c. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/USWWW0201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259d3a1cc1826959ed112b5e6cdb80d74a8f496c536c2a07a056f9e954d38ded. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USWWW0201081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee93edc55ff48c8cd8a21426bc43d2363d3d5f8762c6174d4a79d6f8bf3dfbf8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USWWW0201082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf43b8ef1b4c035e2649dd3528b14729af7fefc3958090403b6f934bca092e8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USWWW0201083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f00774873a0a95ab29ce4c515aea02f0d9beeef873c1f6e424e7a8e20721b2. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USWWW0201084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3757acf9f4ab8527b924e067443231b86ad28548e44477124c7aaede1ac0d53d. 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/USWWW0201086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58df9e21918e103d6cff0bfa1d806ecbc4717b7c17718ba633d91d2eba81b44a. 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/USWWW0201088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000158a0a67c6eb73d81eb3f11fe5516ce2223f073f32801839ba51f50f43d3f. 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/USWWW0201089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9367b3cf0fdf4efb5b514e7d086d3242c80de7073dabc9526a2f5a5af45ad3cc. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USWWW0201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78707774ba24394e85f86355b270a57d8c322e474f6fe2c8cf63f84396c28a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USUM70602474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2a9c29a59217294a02b595282442fae9dbd0a3806248f91225281fe8c742c9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USUM70602473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cbcbd4798e90c06e6c5dc6812bd6975fbd5b862179a87730d5a21105f94c07. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USPR39300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078f59c202162253f61f53a6311285caa21ee3c0fd3d3107eb86e9f605328032. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USPR39300058.
Goin' Through Your Purse: Live In Chicago (2400 Trouble Makers Can't Be Wrong)
International Pop Overthrow 20th Anniversary Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c78707774ba24394e85f86355b270a57d8c322e474f6fe2c8cf63f84396c28a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USUM70602474.