Madball is an American New York hardcore band. Originated in the late 1980s as a side project of Agnostic Front, the band developed after Agnostic Front's vocalist Roger Miret would let his younger ha
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 0xa52ad10d99383694df2ca3ee241dfa3eee75acf521a49ed5057e5f5a33c89a6c. 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/605f263d-b05b-43ac-94aa-5e529ead5233.json and https://artists.proofprofile.net/proofs/artist/605f263d-b05b-43ac-94aa-5e529ead5233.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 0xac4ea1d1d408d9ddc7e34a4349c551942209e551ff6d5306edf9f7d4cb6312b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLA329401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220ae9e408feb8a2ebbbec61865e55a9fb09e5e2469257b4364ce9ce1038fe32. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLA329401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b7dc98a9cfdd2d19280a63e52859c523d09eb243582a2107c2fd37b42893a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42412bce31ca30bcc1446c6e0b5515f1ccc5b78cce1aaef4d322f12995dfd66. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLA329401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6bc7e7de809a250cdffd9bfb3bf6aad8d4f6eb8150309914a3a42f37c887fa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f5e94a23704d810f57cf4d3a37a1b54f10286d8ba6dc6d8cd1adc246879755. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90eae74bfa3644ebe9f9ae2644c810019d106fb72326edf99fa184e38a358d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLA329401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6236cf637498b9d34377d267b5e8580249e19eb47f24f8952a884d60db860afe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d01bec602a3d3b8b32eb203b8e319f6ee8bb890828db1af62851e7d5c2a764. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1196ed9d613bfc54042abe63fcd6c7d8c167c3265a47eb413e33acf8028fd9b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e36dd60aa9688789b20c61ba242268fab2b0a01dbc0ef931e0788f329be0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf856c5272431eac34152b0e02a43d35355505d13a66d475cc081b2348f6de43. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf045955d0089923986a26c14c7337b040727c5e63dc5100b35d600c03e43d08c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA329401190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfda47e56dd0f6defdfa288a086c668f311775bbcc36dea4d4caed9ad0f87d1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLA329717769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94695f15b64a03c5b4432cf40a07955a70554d104d35ed987aa9382963c7cd78. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZS7J2310221.