Cat & Calmell are an Australian pop duo band from Sydney, Australia. Cat & Calmell released their debut single "Dumbshit" in October 2020. Career Cat & Calmell released "Get Old" in June 2021. The s
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 0xa6e3dc91f3320c3b90b99cb87a6b34d7d5b44bfee6ab7be8d6baf285d551ac1e. 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/2660603e-05ce-44ea-8181-61811706acc0.json and https://artists.proofprofile.net/proofs/artist/2660603e-05ce-44ea-8181-61811706acc0.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 0xcbd7830b923f88425ba89cc857446463b2b64adf9459a097744bafa2efdc8d27. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/AUUM72000446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a78a1d839bacb1a0fb78aa850bdb9f015f238867402030fe025e744e445cda. 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/AUUM72100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3068bd563f3549be5a36a5cad01c1700c50f112d8e9fd0ca8995b828ae8f3520. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUUM72000448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6d2c1d1aff2505114f8a9877d404085e032fccac5306e64c2dd57302d05619. 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/AUUM72000453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee742b90688cb365ceccc3b488018f25b84e431c7bbfc614743ec043a3fa5d. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/AUUM72000447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959426dbb6371ff822cac9a16db93f3042ba3526855b923ac628da48eefef389. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUUM72000449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6b5ae8eb8597944611233a3a81a76ac86a300c32506a8b990e06c64721925. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AUUM72000451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd574f7268665589519c6c3d6e75c0292f9d992a4701c1bd75a6ba74930b4cf. 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/AUUM72300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527ed4ab8f890e2a48528fde58f3bd9c540d1598bcb3065b5ae8ddb8c0610411. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUUM72300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65835e60f3b0f5134ad2c442206e278cf7880724d09ad18497c1e51beb33ddfd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUUM72300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527ed4ab8f890e2a48528fde58f3bd9c540d1598bcb3065b5ae8ddb8c0610411. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUUM72300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65835e60f3b0f5134ad2c442206e278cf7880724d09ad18497c1e51beb33ddfd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUUM72300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf64fba2d793fa56970f1fe9ca15c453c6c5f89027a83e2c822814744df821d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/AUUM72300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c6195d299fda85ad35788001afd493f3256115d72c89d68d252fc90b3ee286. 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/AUUM72300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8764e2f0551d46c9b14ae61acdf56b2aabdf345ee4df387445d0eaff5b37087f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AUUM72500331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee742b90688cb365ceccc3b488018f25b84e431c7bbfc614743ec043a3fa5d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/AUUM72000447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7830b923f88425ba89cc857446463b2b64adf9459a097744bafa2efdc8d27. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AUUM72000446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7830b923f88425ba89cc857446463b2b64adf9459a097744bafa2efdc8d27. 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/AUUM72000446.