Alex & Sierra were an American duo consisting of Alex Kinsey (born September 8, 1991) and Sierra Deaton (born February 11, 1991), who won the third and final season of The X Factor. They were mentored
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 0x2aeafa7a96e4abf8cf08fb1b8f4f5b230f60c9164a4f3616eec9e44002f65118. 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/b125f451-1105-4194-99fb-eb5c826dee08.json and https://artists.proofprofile.net/proofs/artist/b125f451-1105-4194-99fb-eb5c826dee08.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 0x3f365a6c6849f74e1ff6b970a34c0e1f3d6951e14529cdddea6f70411e16d3a0. 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/QZHN92190155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70156e0a6e37407e53c73e8f1715b10e58be9787798bcc1bbda800eea4f1ee1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN92190156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa172ed0d5f2de53d5b90f8ab771d106aff1d5dae8c8ff5bb50178e24a09ae7e. 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/QZHN92190157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89e7773087900a5d7d75e6875920071301586a78ee93cd481bd0d1fc25f685. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN92190158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c76c4d297b18cfd8844121d474a5a7dab137025f69cfd4813be8cc23bc2b34. 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/QZHN92190159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a362b3d964a2cfe5f89b35de728c4e43e230cf59a2d2d052a48fe18c87e2da. 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/QZHN92190160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd566d1fe2cf3cfed33acc1e5f9ce4d37b6b7bb82c83ea58cc8239becd9ba07. 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/QZHN92190161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550ea5ecad525a49a8a87e53b54268cfcf9a1817eebe7d5fc318177e280b5ffc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN92190162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363ef4bbd9f350ee0c3dbca2444024702696695612be21a464cf023dc142786a. 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/USSM11402238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a011d50799a172dca12e0ece5e81186564bc6ca7de90448e3e8851db87fc1. 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/USSM11404185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7257be4df13ecffc27ae8138c1064c253401875281de6a85cf756f6fe3ce8c61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM11404186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eceb37592e7c0e2256fcfbcc88205158d9d08ac3f861ad6bf4ca0f9d0233a9e. 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/USSM11404187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1cdf574f1aa014aa60105737fdea56d5bbefea59f74995d6a69c14c0c20cef. 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/USSM11404188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d48ac0555826ac0f753c4e4dceaab1dce5017ee2a4b73d13b3b7953b5427d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USSM11404189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec8ecb961eb1a256128586ed0c9315053d4e208afcfddd084456d349d401818. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM11404193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9753f43f0c9fee6a7edbdbc15de6057f05f6e833a1a6999018171d9f3cadc702. 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/USSM11404191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25903b9e2261fa8c40fb6d9b6868b42fb2162a85039ba6a8b8a3153e82056b90. 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/USSM11404192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec2fe0a6ed862584e505d8148510cfc7ca075c4681e6c37695d2016e7c14a24. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSM11404190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc2fc9a1bae894af846eae2a633a6078a0cae6ac61552e86ad97c7d2febfbd6. 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/USSM11404194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7939e844b86b8d97ee540a476f43ed69cf4732e2df9b304f76e180542d702554. 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/USSM11404195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445a38ef2d064d8948f3b31c427d55faf5b4f5186e6a2e6a7a180ae41cfb19c7. 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/USSM11404196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec8ecb961eb1a256128586ed0c9315053d4e208afcfddd084456d349d401818. 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/USSM11404193.