Circle of Contempt is a Finnish progressive metalcore band formed in Pori in 2006. The band consists of lead vocalist Denis Hautaniemi, bassist Markus Karhumäki, drummer JP Kaukonen and guitarists Ris
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 0x307e65bfba2505792f1aa10e08e7b3f7260c3927619ca058e847f7cfaa01f42a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e37c4f5c-a8bf-4360-9719-4deae5d8a384.json and https://artists.proofprofile.net/proofs/artist/e37c4f5c-a8bf-4360-9719-4deae5d8a384.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 0x25528be78699c9337c9b61731da5315fb3c2cb7af142ef157e247130a55803d7. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USYFZ0902501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68979030bb02230205df4584cd1b9abc0599b7f5843e2e67045319d5721f0f68. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:47:08Z), 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/USYFZ0902502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b127b15054c8abf933da359111c3e9bf2f8312fcb714d712131219fa79b7f4d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USYFZ0902504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb522bb38b39e18e6edb086c2b3a94bba74fe8816d859977ac828732ee129b391. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USYFZ1224701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5333367eb567f88d5c0d20c1d900ccf7ef26236c9aae7326fd6a0155303ff21. 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/QMEU31607764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2225e07e2cecd5c407fc7393356105d442b0e0231f7ecf4fde6b6536578c43b. 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/QMEU31607766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67ceb231a811ffd53071fc2b68d56b3261f5f1f618974e936920a96dd5d933d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QMEU31607768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0afecccad440107c74d378f18d8e6e8277f22a99dfd56c414c09de96105dd8. 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/QMEU31607769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae5557ec442c94920553795d8186d6d8a251c7439a2f5d45d50892158f2235. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:31Z), 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/QMEU31607770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa79aaeda2257ce248a02476e4f0d23fbdbe880001115b938305ebf057e6b960. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:07:01Z), 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/QMEU31607771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5c293593ebe48a62e100000f4e2838bbb04aefac914e08007e97790e35a090. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:02:58Z), 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/QMEU31607772.