Khoma is a progressive and alternative metal musical group from Sweden (Umeå). Founded by Jan Jämte (vocals), Johannes Persson (guitar) and Fredrik Kihlberg (vocals, piano) in 2002, it shares some of
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 0xd3913db9e77aba55009dcef3ff5575db28f405463e5d9b6c47d4fd4f61287f55. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/369faa9d-5cdf-4ef9-a4fc-715b75d7cdf9.json and https://artists.proofprofile.net/proofs/artist/369faa9d-5cdf-4ef9-a4fc-715b75d7cdf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In the Twilight, These Rocks Have Teeth (A Compilation of Contemporary Post Rock and Metal)
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 0xd9ab367b1bcbf2358f9e0eced25d765dbad26493bbc34be0b08772d9b8d12fb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ651713236.
In the Twilight... (Pelagic Records Compilation, Pt. 1: Contemporary Postrock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0733858064478165cb091078a83359c73280b81352966c83aa0dee4ba31faaf1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ651717563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2b44d8b065bb8bb895f3bf7ff342295bf703394eb629ec4848817b92f1f25e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ651717565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f15eb92e8345dfbff74b37318d8e82b74864c6605f27894eb8e106d5c6303d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ651717566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494776432f36e76de23a77364b09e6d06961329827621c28c8dff82b53e5ef4c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ651717569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2eab0beb743dd0b7199388f6d23726dc23cd865d75121956778d1a1c6218ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZ651717570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd3e126f506fecbf870ba00b94993ba202900fa3dedde60d1b6bf402c3b0e9d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SEWBD1003804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa54749f6e9b098e270f2fcbcd17ec5b9f5f1b0997e640f26afe9ebaf892e05. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWBD1003806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782f200c6a27544c3a47920095baa54a9b0ac0bc99c7dc11208f60db9ecc9ad1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEWBD1003807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab787e5b02d91088ee0bdb2f7be56533af66e72c4401f833c27aee8cf4f76ce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEWBD1003810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e8c8658b687f3e977921d301c2c0011de2b5d0666b8c794e3f0ba1ed6da0fb. 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/NLA320581517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28608b193fcd2602d01cc104ccf01ca90dca0bfd7a21efd1b34cf66130ae9a9c. 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/NLA320581519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf393f7c98395c1b081dbdcf195f137b92deb40ae60d729b7dd99184c662c4ed0. 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/NLA320581520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248cda1b6fd8b26fffee0bb5afa8e905dc6aafd28730657a6704dc2efd40b865. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLA320581522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f56e6135ca20efb8bf0574b4b0991ba5fb82a9d21118e895ed84aaa2b82abf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLA320581524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0b80431c291e661e598c0995687af0aa8c45c8857600008e4a0694eced14b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLA320581525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1f47e969425963784a238b31162b390440a08af1ff9e01d1aa22fd2434af0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLA320581526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352b8c1a7b0ecc887e864faa0e04d84209c916b810a729e1e13a7566fc23329f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLA320581527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf393f7c98395c1b081dbdcf195f137b92deb40ae60d729b7dd99184c662c4ed0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLA320581520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248cda1b6fd8b26fffee0bb5afa8e905dc6aafd28730657a6704dc2efd40b865. 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/NLA320581522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1f47e969425963784a238b31162b390440a08af1ff9e01d1aa22fd2434af0. 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/NLA320581526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a733227f00b815323ffeac1359dc19d9640b6de74ea9bdb9dc18b1508a04b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEXOS0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bb9797810dc25d17526a586d184b4ef67fe7b6c8aaeb5d6417fd8539292af4. 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/SEXOS0400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f30d037617f4355b19c43527345d5e8a1d361043ada3b6165b6771268b7ed5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEXOS0400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa154eb0555085052a66f8a5efbe388f643c8346167a4acf0c891a72e9f0568dd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEXOS0400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b46e6523c72b85b5fb2f0f1881398be887d4e7004097a71ea32484bc480101c. 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/SEXOS0400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f58683b4465e4d771792618704c3d6fad98eef0cc3dbdc314016068ee10b5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOAFE0204030.