Cruel Hand is an American hardcore punk band from Portland, Maine, that formed in 2006. As of 2016, Cruel Hand has released five full-length albums: Without a Pulse on 6131 Records, Prying Eyes and Lo
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 0xaf99b9c52cd2a5a246206f93a88114828bf386b7574e9be1a308adbf0f1437d6. 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/547852b9-7215-4ad9-8fed-f417c2a965cb.json and https://artists.proofprofile.net/proofs/artist/547852b9-7215-4ad9-8fed-f417c2a965cb.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 0x5c252a674bdcda9504a867cad17f236360b37dded5adabb10015c39ef10e7928. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US2Y70800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cb65124e38f0aaea1658ac1d8b5cb1eb837af9d7acde8360c5cefe74252acb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US2Y70800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b60f40706b557cd55ae5e31c3aa7e1647289ca22130b0435ae432d8849cc113. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US2Y70800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae53964df2e388b3a5998f0837449147fc4b7d58c08b568b2609a99f80173b8. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US2Y70800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a962334d607e2acbda0c424a74bc208b3731b7d33d8f6a022529b9ced1eb02. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US2Y70810302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21d3991239c65629572dea4790e6d0931f3fa6741dbf702a54aec9e0f66281. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/US2Y71000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0954f8a43c4ee561d9e5312356031c28378556a3ec8ffc4a544c3420820f0e. 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/US2Y71000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7e611888c3a17913f82f7533d2ded71e741728cd5ec15cb0f14c2904d1cc52. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US2Y71013601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c125d7ac986e5155fc5a6121362190f599aa35160233857c96d88035827f0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USA2P1369878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8bf09efe4eb12c8300315e4e62a531b53f2f9dc148f620e13f198cee9b35be. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USHR21487001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b247f12544b3b6f0ee193fa4526587e743083ae0b3ed767a524b9123203478. 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/USHR21487002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d58c0ba47919c24196d1735fb008c603db1e5563fcf238cc04f65037015ad. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/USHR21487004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661046bdf18739de117d1b87421fb13850d7f7bf47a9a6f8ad3020150d93bd6c. 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/USHR21487005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bebd867993bba5e60b4574797b9b794e194ca2e2f213ef5fa8b89d226fe5a4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USHR21487006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714c7cd3cd77d9a60ac60c8f896edbd9f23c4cc4cfe8e80b71cffb0b311160f3. 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/USHR21687004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934fe037cd73f124a2f5fe3a87ac5d095c16a7df6ea80db7f011e755723425f2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USHR21687007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a358a689fd5f89d5dff6fb274d6e8504a80b9892f3377b8128b65814163f5c. 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/USHR21687008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c60db08093234c42c34b1cbd4a21fb14f4279a60ed7caadb26ba10505a066d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USHR21687010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf091160f519fe1e001fa6d04f1b26cfe0b4b3fb80291037c01fac08803a54285. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHR21687011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c44af92924eaad76c96c1c255832b5029d5ae857692082acb4c91021ee398c. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZ88N2000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111ff0f1568df470d913450ea98e389e5470c0e8af9983912c66eb0fbfe2df6c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZQAY2430700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00f847cf3187423827ecb261e569f807dca4b4f790233983cb14a0ed4e24d57. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USQY51086114.