Blue Cheer was an American rock band that initially performed and recorded in the late 1960s and early 1970s and was sporadically active until 2009. Based in San Francisco, Blue Cheer played in a psyc
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 0xa12b7af0fe383c0dbe3b592071938580adbe73675840bb3f620253a1d813f1f3. 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/5317459d-663f-49c0-b182-ca28223155ae.json and https://artists.proofprofile.net/proofs/artist/5317459d-663f-49c0-b182-ca28223155ae.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 0xe637c5831df34dc9abbca8f6103987c11ccbb6233344d4023aa57c1dcdd9e347. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USWWW0200777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f318c4d6c582fbf5be086b725f78d338bbffd1acbc07295c446f95e16c39fca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USWWW0200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127e537558168487f50daacfd7c023f0624f720c35dbb1909db06c44b07a0fb8. 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/USWWW0200779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e8918ad324e00cda9bfb8d38e2d87ecd253f83b452b97d2946cdcf4603bae2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USWWW0200862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fbd15cf20abc1d890415ec6efdc35a47bbca74512250c61993b63aae83da33. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USWWW0200863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393fb5094b9b07d29369dd341d8d2d27481b3a4b911b092f74f3adfd6165c43d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAM10080052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d117e776fa53c5d6ab8dcc3fd4378461c4ddfac40cdbd95073febf40a9d503. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/USAM10080053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bb27594a5b5a9a8d91ef14bd9d08a6690ef78fc92bfbff731d251368e6ec8a. 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/DESK91695403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb4bd83cd79d649372e038cbc1ffffb921b2c28e15d9baf692e796cd6c62a5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DESK91695501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaca7a03b2ea5bad0cbc06167885692061150b2a886a56d78d41130d462c151. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DESK91695504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb382d52b0bfdc6c9483d3a675cb2de0b0655f6269430554f39a6180d81c77ad2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DESK91695507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aa7c158301f4288386e93093c86de0ec9a92b0e1bbc9efaaa194e57a3dc660. 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/USWWW0200872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997f5e9570bcb6d487cd7eacec5d54e8d81cff34a51a830af2fdbd38eb1804b. 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/USWWW0200873.
The History Of Blue Cheer: Good Times Are So Hard To Find
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57069f809692240a4dc8b50f802f580e90109b2938db386989f6bc9a9478c1f. 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/USWWW0200865.
Three Giants, One Tour - Live in Germany in 1992
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7179dba2f2ae05ab56be0f00d6e5b062586a475bef7eaa97e2f592b8c703088. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/US4LA0811701.
Live at Rockpalast (Live, 11.04.2008, Bonn)
Hello Tokyo, Bye Bye Osaka - Live in Japan 1999
Party Hard at the Underground Cologne (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e71505d62b747604c17c9daa44efd78de86f68e2dcad03f1864c93d424f21. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZX8U2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c7a2af0352ae32a97f2ed8708a0de6c8c0ab4e29cb844e378890eadd592fd2. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZX8U2400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3246a95f628f6c2a2580e250e0f76704c6d0907eb09cea14172fced85c969155. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZX8U2400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e71505d62b747604c17c9daa44efd78de86f68e2dcad03f1864c93d424f21. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZX8U2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ca42919399e25d474858312a368aa0f47c43313718bc85e274d5f3ebf8e4a0. 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/QZX8U2400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7218b63b1a8f2cdf2d83c5636a559e44ebf33c076f94df3458f12fb7b6c7931. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZX8U2400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72cec09b22babd04bd13dc63d0c424b9d33b36204d3910f903b720715fe2fd3. 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/QZX8U2400344.
Summertime Blues - Live Final Performance 12-22-2008
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d0496c63cabd7fd6ca94f0c82ecfc022cf44e0abfa8096063fa627cc04f935. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZX8U2400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ae6e40ed4265b096ea144d7b8d4890c115c9896fab098c7fd18de4bf107bd8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA371022046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01072cfc23a6705b84876439c81ed35e627e854235ca00a07a0f49f01ae2d619. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA561289790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7162eb6d8169a08b66e297369243c438d8c496ba11e153a2e560e9483807df66. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA370998927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7160d544575f33665cabf1c82eadb091c63d374fb8a2b7b16bce4bfa9c4f3bb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USA561029659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dcdd9c709d79c43f4783a3f0a41d374bc24992308fd023e4bf71d60c98308e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USA371021734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d764ea369de7ecc94c465c082a0dd97794ad6ace784656429020789ce6bcab. 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/USPR36806028.