The Cool Kids of Death is a Polish alternative rock band formed in Łódź in 2001. Their name comes from a Saint Etienne song. The band is well known in Poland due to their radical lyrics and widely ex
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 0xae8dded4998b26a5fa88a235adc55f45be1b9f4f84d6bc6966131f135e4c2fe4. 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/4d7da29f-7cf0-4187-8330-e3ac994eb9b2.json and https://artists.proofprofile.net/proofs/artist/4d7da29f-7cf0-4187-8330-e3ac994eb9b2.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 0x4cbab24af990ace5246f5c6fb7a19b110f0c07bdd225589c0f10cd71be3400c7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:02:15Z), 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/PLA330200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbedaffd750dbd795481b43e09825b354fd9f0c9cbb8642cd0e5b6c9d33638a2. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/PLA330200820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983746fbe22b4446783ca1ed1e1c76b06ed88df078699e9d9a849f54421de6c1. 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/PLA330100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5ca9f57685104c29044b6b1a684223380b314a7d45525907216470a8e67309. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/PLA330200824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa35eba083844cc9de1eac0bc1449581d650e0eb5bf353dd18853a38bedc67. 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/PLA330200822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992a10b162c1b24e24bb8a89e66af25294b3f11851f6b8babdae6099821ccb5c. 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/PLA330200823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fcb9182f84d82dbc7e487825385c0350439d059e72b339d1c7fa4d0235cf5f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLA330200817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31b14c760421c3fe164107040575f2bfeaa8514ad6b9d529a56d42dd3dfe5f5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:37:00Z), 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/PLA330200818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a00bc14a52b13deed80710e1235537aabe8ce5b6e741b6718ef321a7385516. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T11:05:11Z), 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/PLA330200724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f731df6ad80e76f40e7637a5bed6c926c07ae28df2c8181b2e5288a18086e4d. 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/PLA330200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd480b73dcd11976f16d6dfe58c220301e4b90c45d0bb9b35787cdcc239cedbd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLA330301272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c44c340114ec0acd76618bcc12479fd2b96b6cce20f612ddf779821dcb97ca8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/PLA330300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8165000f42327b2b52e44c957f9a3901363e9b2964d331884b531b046aa7da8. 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/PLA330300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b433218c6ec81fa640396f33e381ba44d6a9143f327a9b7ec2765808e7ab60. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLA330300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca6921c2008dd1207c4020bd02a5bb54d4787d80b82a84407fc342b8e1c2e2b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PLB380600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1440550080dbc0f2041fd6119279fb9a31fc9d963946a2e4d953f11e24d6da. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/PLB380600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fad33cb2681f31229e5de7f0d60e0dde67aa7e098ce96c397e5cd60e0567bfe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLB380600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566731cda641537db594468c1d8d353dedfa65c8002e7181a7b466e11d07c71e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLB380600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c025c7463cfc99090c90310b1508178ac19dfc3098434a4f5cb817643a999. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLB380600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebee7e2636315beee7b2205c68430bb306f2044da635da0e2f41001895b2493. 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/PLB380600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfbadc0d8963fccd9fadccd97dddd10cc514e019e4c5d6ac42cf75e95870c43. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLB380600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc6c9c4b927ef04c6ead855b73a56d72e8df2aadbd82b733906c91dde362399. 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/PLA520412100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4b983fe4995ab410f55eaab9bd4e57511ee6de29fd4eafb034a6d86fe1798c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:01Z), 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/PLA520412101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8e6590766e070c9d93c280d9612474cd1d45d54407cb1150fcf1feea91269d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLA520412103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1d104a23eb7e8ccaf7c83c38d9c0933bd57a3d37862b4872b2d5204cd98aef. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLA520412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e8e15078911f8a46cbc512d5dd0e3e4bda106d0b3b3d89111cfa7bd7905bd4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:53Z), 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/PLA520412105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd37617e2be4377c42525af4330fc7551ccc103fd934dcc57c0b096e22b23c3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLA520412110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1677d54269e8a611fc79e12c406c9cfaccba5d873a3de676be4c7542bb7e890a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:48Z), 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/PLA522208407.
Żart / Butelki z benzyną i kamienie (feat. WaluśKraksaKryzys)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9f5bc9e447d275eb16c8504850b1922e3e63c9ae0081203ee3953c53bf57c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:57:17Z), 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/PLB822400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46236df21d25f0877d4e6e0398cf8d2b0b71928026d6e2e52734be14a56d0c0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:15Z), 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/PLB822400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1faaa6653edee52a89b7aa4397740d8d5fd4c30e07fff0476166a9ac964829a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLB822400254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7cef96d23e059f1d6d4f33463184eb38e116b233894e9bf88dc0699320be7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:59Z), 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/PLB822400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92067f272cd3e91bb6a5d924d3e9d9b467ec2fb67ddf94ae9c4c3a6ecebcb05d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLB822400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78134e8177844939ec62d0db558f109def712b8d85b2cb8eacfa63ee408d4228. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/PLA391146007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c2f204923cfe5e846b9e9ba66851d8e993347e52d7c2f909daf966ad71096f. 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/PLB822400218.