Anton Kim Ewald (born 7 August 1993) is a Swedish singer and dancer. He has participated in Melodifestivalen several times as both a background dancer and singer. Career Ewald began his career as a b
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 0xe983772a6e13deebffbcbf57e87b1b30a81dcd4df43d48dd03fe3fb5178edf78. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cec8fe0-676c-4b85-85a9-3d10d58a141f.json and https://artists.proofprofile.net/proofs/artist/8cec8fe0-676c-4b85-85a9-3d10d58a141f.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 0xc0ad74f4014a4228d5de6fc9ab466e100f2b5fbe43ab9f5e3c130ca387364e81. 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/TCAJE2573437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5cc8978fe1f08f2eab8b46ce4f8d2537cb4a78acbf775d542fdd3a1d74edab. 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/SE5RI2104301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495af502fb75cfa77677267f1c7b330f97d8ffeb6d5e59dd6735700738c89d77. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SE5RI2102801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa698b84a186d8c9d25b7c2132196c11ee7f963b4422c6bd289993c5fe2f20387. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5RI2102301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b2cab7ee70ee053d8d10cc7fc6293b90ddea4c8d82211bacb94667048235b6. 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/SE5RI1700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0999980c6a6557942d05fcd0e86ae359c6fa69e29a9b90d9e2c6b29c0166ed7c. 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/SEUM71501275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a73c49cb9e7d10d3e59499bc5a4275753704e0ce8fd8657248ff4a435e1a5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEUM71501273.
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 0x4c3139f91863cfe074d036e5e867dae789a5e74f777713a1f494aad12609cc1d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEUM71501274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918ccb356658dca2733ce83b64d7b5d869beb00e9e7e71882896219a545a7583. 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/SEUM71500610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2260512a3d50f79d35bc34f22cc599e4514e089d214fe052e4fe728c5c9fac48. 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/SEUM71500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcd3d4afa749a49b7337226d11c59b1cdbd9710e9d44f1d65b45ac1dd3b5102. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/SEUM71500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af679bf1a2aa8e38c65f5c8c88fc4e90035d273d8b5d71ba773b0dfca1b4e77. 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/SEUM71400918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb22da03fd0e24438e47166bd3fdd14db0493fa53cdb063643474946edc1271. 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/SEUM71400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea758be7008a38de79e9e0da19cd85b59c51f3d28dabe10a9a4649444d80db. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/SEUM71400916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf511f273a699fb1bcea0d730d29acab6039e27093d078b7e4512f7c4a6b0e19. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEUM71400917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d9c5fbb72cf4dd82fe28bfa8b03da89a4b78b728386f6fa9b14a5b59a7cc76. 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/SEUM71400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4049ed909305f4d78938d2097e917de4d8f06f3f9a85cb11faa72d8e225de7f4. 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/SEUM71302307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ab614d2b7d2205117f1eb2f6d82ba55d821d7163c494df75e60d4a729f5b95. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/SEUM71302306.