Emílio Camilo da Costa (born 5 January 1974), known professionally as Don Kikas, is an Angolan singer from the city of Sumbe in the southern Angolan province of Cuanza Sul. Early life In his early d
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 0x87db7f13911a5445d153656d835e1da889cd10358076d155bf12a5b3b18bcb72. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdd713eb-bf72-4f60-97c6-edaf291f3162.json and https://artists.proofprofile.net/proofs/artist/fdd713eb-bf72-4f60-97c6-edaf291f3162.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 0x94b62589bad49438eb27ebb67fa9f383afdb6a8d6b7d9d0c7e023d53092d64dc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T10:42:12Z), 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/ES71G1501185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63ed10ec317ab99caa5f1052db771bb14f9b593c00c9a7350df458efa70988. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:18:42Z), 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/ES71G1501186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2451adfd0cdc676fd9cefe23d53d6d97149a0f5a4f09850d5b47f4f37efda7a. 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/ES71G1501189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9aceb134e118b3b5c9d63b3f2e7f6cfdb246eebbabec63a9e5a780b0885210. 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/ES71G1501193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ff8c820eeaa2e0e71015c7ec517e52f7f69c5be61e294ec8a0721073b0de9f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES71G1504302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355febb4700f61a36e1d9899834e08cc4e5a62a89ba72343c63c8c22989cf069. 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/ES71G1409116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9722c2cfdc2a3eacd21cd1641485be7dee7b8b053eaa57a2cf4091b240aadb5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:51Z), 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/ES71G1409124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0ab68f249b5b6d08e08456b2b95d46479fb0c7267b84a77e4b6ed705273b83. 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/ES71G1409300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46786df2feb38c4a198e10d40e9efee999a75e4032f4c843fb50b2b114610cbf. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:43Z), 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/ES71G1409301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20877549e76145c9dbac85ec42a5e8b6e14f2f494f8cbfc7a0430f3004f284f7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T11:59:56Z), 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/ES71G1612400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eeec7021fd443bef7c8c0a1791120101f37141f3016a381cff4ae44b8e580d1. 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/ES71G1710980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354cae71b9665130f7f4c620387595cf4f677cb30cd4e2888036193c93792bfd. 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/ES71G1929531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876425725578a6ef4bf69a9946e83f9f1d5e7f4671a629f8f82495c9a146c92c. 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/PTRO12200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a656dfbd8a96c385358a9a63030627a2c55e8eb9cad331c3eb2c039aa7de0e. 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/PTRO12200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae4492cf0a8221b81866a02538e491d7c178140167b074df39a386050a59756. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:03:01Z), 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/ES71G2415974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46260378529dacd8063f48dc6cb8bc4aff184c5c0eed42f68331bcb5d8df3265. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM7282555306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd33f55e6a4753399504e2bebbb54c2bd25d80a89df69c3082a9942328ca3925. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:45Z), 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/QMBZ92580962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34e6a2720b1a32205f619662540bc630b3a1dccc9ed483a0f5f2fcc8aa87171. 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/FRX621316140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bcaf9c0c1c40550234aff474be1da00e27a2ca02aa427114302c65beb92d1d. 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/QMFMF2137222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f4fe38cb71b75410298cbeec13bc21a6f4485720409876042e7e66694d8447. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA371108327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d54342c74336bfa50395301335814fdd931dc65d6391c3f64e10c5e7a775108. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA371024349.
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