Osker was an American punk trio active in the late 1990s and early 2000s in the United States, based in Los Angeles, California. They were signed to Epitaph Records until their breakup in 2002. Their
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 0x4611de15ae23ee1ba5b6e8773e99b760bb4252885d10d6840c86f5577ecb6c66. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9092c192-80fa-4768-b935-615148b218a2.json and https://artists.proofprofile.net/proofs/artist/9092c192-80fa-4768-b935-615148b218a2.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 0xaa6c20638c288f66fb2b550019000f38d37144da66cd624c19899785a7257322. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:41Z), 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/USEP40351101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb7d8b2954dffa8c1c6f664242c34c0479dac32743c33bc32bac1a153d0a54. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USEP40351102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb557a7f0a5df728f166324076ffed80658683fb1237fe6a56b76df2489630de. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:42Z), 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/USEP40351105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbbb81080f14cee1c386d74eaf7958b55a7587a8ef8cd127db3082008bbdb72. 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/USEP40351107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1865b7820d72b385da509f961ccc573e36df8be7766f098073e89ed40bc8a7. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USEP40351109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e303664d0f73c3bf600167c25bf8103cb660daaabdfd4f8fdc5a064c6c380a. 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/USEP40351118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3edc2ed22cca0e5d56b136528332e0b2a84bc92208b0ee46b4863bf76f66a13. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USEP40351201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a3558b5361da5cba5716a80683b5f792e0197535c55d5623fd1f98c749a9fd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USEP40351204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ae1eabd7273b755bbb256ff78a10237f7b27a33f3c40f291d6c32badd6387. 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/USEP40351205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b430c335b408bad2287a643680569588084208ece7a82a0bed9d8dc6652d459. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USEP40351206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265b9f6c2aaa0e84825cc20540d7998983c3ee3405bf04e3f57eb873831806d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USEP40351207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba70a3bca5a236fac33b6836fa3fa9d0c29822ef895e2acb6fb81800cd933a6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USEP40351208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc22fb98199341a72ed6de2e17605e0028adb2270203a8ecc52dcc404ccc8d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USEP40351209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412d486892645afce2cd7bc4e0e2a7ac1fa22e922061065861b37306f423ec4a. 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/USEP40351210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13871bc01a55edf344c5d1754bc7262c4d564e47ad1d92dc9bb3e390d016a6e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/USEP40351211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112cc1c7ad940205ae62b471a39b7b7315cd33e8a83c91b0e0c5ae9ae4509b37. 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/USEP40351212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff26a4c4e58e666b60c6affe8077e9050e517298cfee2752bd7e720f66d9239a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:14Z), 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/USEP40351213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fcb3d0262116168a41d8650d3ed2bc89204080e0ae49b1d0012ab91c552d52. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USEP40351214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0347850bed4e5e3b117e0296c441d2c0b2ef1d21e62deb24646d59683971c4cd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USEP40351110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3173add23893a4ac06bd11c1f3326c0e8f6352f3fa1daac9fadb06eb5b52d242. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USEP40351106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e6310dba3363ee74933fac533b0302594c39f0499702534e7c2219c0205f74. 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/USHEL0803102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cd225f7765ed567b911414b916a77119572aeaaa854465ce8abe76b9278944. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USEP40351202.