Caater was an Estonian Eurodance duo of Kalle Kukk and Markku Tiidumaa. Caater is signed with Sony Music. In 1999, Caater was awarded the "Kuldne Plaat" (gold record) at the Estonian Music Awards for
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 0x91a32288f83a4e8b3f22e678025103e8ab32573b77574781435e8787d2dd1d5c. 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/ad49df6d-9d29-4b12-b9f0-bd073553c313.json and https://artists.proofprofile.net/proofs/artist/ad49df6d-9d29-4b12-b9f0-bd073553c313.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 0x5b31ab136d677951c6b56b9ba7b6db00e51627053b0de5309262be6ce0e3b4e1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/EEVT19700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8544dd04b11ab71830bf1c04e551db248d179d5137efca2a49c82b8e766e97. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/EEVT19700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a167142185d73748c223707c43316715927591f3b4761cb1cab3b214a0c5a5. 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/EEVT19700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d25c991911a5bce33d7893ca0cd8621f9f2fef7b5c105f3aa44ab1452c03b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/EEVT19700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9b23199103302ccbbc6c960944a9be6b1660bd9257e16850865b0d6cd8ff1. 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/EEVT19700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b31ab136d677951c6b56b9ba7b6db00e51627053b0de5309262be6ce0e3b4e1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/EEVT19700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa8df131f598549e655aecda3f8bb6af67d4610d36771bd9177e245b5c5ac25. 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/EEVT19700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1d93ee8fff2f15a34c1b81ad276063d2701e7df6140099edb2d50178ac9894. 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/EEVT19700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c120ff9bee02ac5b54635ef5ebc1462122368349ed874d12e0cd32fd36042b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FISME0100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaa234eff0de021f0388e60ff30dfd2c450533045746e66ad4dec44ffb8e78c. 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/FISME0000015.
Hold That Sucker Down (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9698311638804427685aa903c631b3ba0ed3fcdbc2750f474eb7f47803820f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/EEVT10300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619ec6d59f0217661a1c4bc02471c3d05148de05b22035b1c285ee522375dd1a. 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/FIWMA1500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619ec6d59f0217661a1c4bc02471c3d05148de05b22035b1c285ee522375dd1a. 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/FIWMA1500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9761d45e903fcd08c3202564f4fb645d04fbf885b626f1563c4cb752bd9619b. 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/EEVT12400001.