Big Black was an American punk rock band from Evanston, Illinois, active from 1981 to 1987. Founded first as a solo project by singer and guitarist Steve Albini, the band became a trio with an initial
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 0x280cc72901b98ce107391e2c84240c475df0e0b43010f337e733d87698c5db93. 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/244b6857-6ef4-415c-8b2c-0e8b942c6113.json and https://artists.proofprofile.net/proofs/artist/244b6857-6ef4-415c-8b2c-0e8b942c6113.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 0x48f9ce9498dc66facd5f3913552bbef0fabe30309be3d1689c81af107a6aefe0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USTG39208103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa615bc3e8d9ef038c43566b0d7c8565fa02ec07893399188607af4f7cf6501f6. 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/USTG31702401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa363b6bb5fde0949c306631df1fbc8b8b6811fbdd92982ea363f4b1252cf22c. 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/USTG31702402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd09fc951d3d9e58249acf174e72d16c30733b5057ea7ef07cc0ac771858b06. 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/USTG31702403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3060361936667c735992481adcc8188edea604f82b2781eb4cc66522094dc4f. 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/USTG31702404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c74c3b66d550beb6fdb784e42f9ad2289ab29c68aa22c2bd7c2811657d36f0. 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/USTG31702405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8956950fc342e8461fe548240cb9bd6ad9ce812ea269c1854b2162b5b59119. 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/USTG31702406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a79fe0a861ed91d88d9c799e43b0f4e903db3136d63f784beef4213e6dfc2c. 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/USTG31702407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc240c1f01ded5ce66c0522f2d4f6cb3f313ca88b40ddfc96561755b1023d51. 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/USTG31702408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9179487cb7051dd96437e18750e90bc47045e64e6104d89cf2e04ced55cbea0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USTG31702409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e0d1bf3985e3e11e4807b874eafff93a651a9544a26aa185dbc324e72ac67. 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/USTG31702410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff1d565d119d34c774144bd059602859b0e5b60e712f1156c8201e5246e99f. 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/USTG31702411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b4157c9e003cec5fb50fa3534a14f797fb0851324aa0e249ea5861bfe1d18. 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/USTG31702412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003d9c8919b82d5ea7a5884661af4510e96fdb53d39600790c3db62fe53e5f83. 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/USTG38702401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266bad1434d0102525aae4468d830c4690ee1761cd5be12283c3c09f9ab4cf58. 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/USTG38702302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6c4ee90a95b50aeae562ccbc539ae9aaa84a0510af222390c3f8c2f57d5946. 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/USTG38702403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f970ef813c0d04799ef72bac244335367e6f080b469a086336819ee931f85d. 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/USTG38702404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f1a8be410df2b4adfd00526e83846277ac88ba5c0dd81b505933b1799748c. 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/USTG38702405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c645ee8c7367be940a4b0d2b191a9c8e5bdf18325b4fe810dea963133cc25c. 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/USTG38702406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6d5db744ac85cb50e194946b7336638881c79cccb1f3e0a6bb60c7090ad43. 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/USTG38702410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0abed19c08052f71edb90afca50216c530a20633a522b84a4029647551dba2. 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/USTG31409301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe327f499d8580cdd990decb1cab8297cbf56fd085b41014712117518b3193ae. 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/USTG31409302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab0dada68d9b1f3ef0862bccd9cff819d25dac915af1e65f9d7451a22b8b67. 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/USTG31409303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d4041569eb76589ebfd5a135af4b8e4231a9e39dc3de4d7a8fe781fa8f462. 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/USTG31409304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bfb5fab23f5e7eaf4b96fa80db6500aaf656115296f84f93dc3f9dc5f8027a. 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/USTG31409305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8eb6776410d7c85aa46aeb12a61b50f20c9936705c6045e841a001058cc60a. 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/USTG31409306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d06095feee7fc760396590341053357cdd30afe5d4a182bc53e5810b816abe. 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/USTG31409307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498c2422f042d70b604bc1bcc41fff3f40a1634b2cc213de4b4172b6f0f3fbcf. 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/USTG31409308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00478dae3b48e66277247605056fba28af8c1ac0f49517484bcb2cd107c40465. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USTG31409309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1320d84e6b49bab94c6ecec3f30e523e0425522e6c1b161335a30bdb31b18a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USTG31409310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe404247ce5f7694013f6d5c6d64b1ab60a0b3ff3649ab25d5a324bbe793ac3d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USTG31702301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed45f849287dedfff4adb192a98056a7e98f4c3bf0829dec6cd2e642cdb6b8fa. 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/USTG31409101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fc5042ae7be1bde68ddb4e9bcb0c96621e822243cab98a7e894e359c7efbc7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USTG31409104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13abbb7e2a96192c2b24afae82acf493efaa5559de09365530777e066a396cad. 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/USTG31409105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927f9f7016420ed3dc8de35292431ad5f1f94778b332e95538139d9bb974ddc6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USTG31408901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6c3b92103c48006382cb44484e01ad1f62d8ddb92d69da593d95b2a0e3e280. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USTG31408906.