Almira, Königin von Castilien ("Almira, Queen of Castile", HWV 1; full title: Der in Krohnen erlangte Glücks-Wechsel, oder: Almira, Königin von Castilien) is Handel's first opera, composed when he was
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 0x5ef0832e88e4adbd84c676b65733cfb2c3dba4e1e108cbfef7cb8f72352cb243. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a31c2fb-d343-42ce-9e93-a43ee280793a.json and https://artists.proofprofile.net/proofs/artist/7a31c2fb-d343-42ce-9e93-a43ee280793a.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 0x31eab0810fe78a5607f48ff21e081cdf7c4bb79962c62fb8f37913f16348bbfd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB22518358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6d44cfc32215dc0be28504d758e47212d2a903073bfc8fc1cdadb49942a33. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZTB22518359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d2a78db0805b3743d125643b1802d29b14a409493c0d1511b452d211849898. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB22518360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef45f3b2fb09b24d5c55c79041653122cd9340be395641211a36d440d99733. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTB22518361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c0e7f510555035f81615d60ecef6a46e63ad0c6936c774e402c4828bfe19c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB22518362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a84887fae68725ad5a71b3b7ecb4582f8f81cdd41f92bbbd7b04b646d2ce4a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTB22518363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b054d29f0fb3c82502a174ac92dd8a9a08d4c5ac4be374b02467279adb450. 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/QZTB22518364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabaa4b28e972335db6c5eb69b91a725c92c2bf347caa8912c73a8f478904bc8. 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/QZTB22518365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afdad854fd1631d89a6275879cd9c708f1fa69dc9cdec580ca7fd8899c7995c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTB22518366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115316cc3af6f6853fdad4c3c1b49aace035eed360a556558905eb20b4d634a9. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZTB22518367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34779bf156169a305945137559538e3cb8998751a4fac412ceab49883dc5d462. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTB22518368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5757e2b99756fb7640e65307da51861bdaa08a4d341b2546bc851b6b05cf01d2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB22518369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60136b86848b9066f8cf112b821951dc2bc5f499f020dfac33edfcd55b1f5b7d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB22518370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59642e68e254a4b68d09a5ec93ed1a5942505f5f7f45442c2b23e3f3e1241c5f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB22518371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f5aa8c0e76f7b1f50fc3548cf7e27174a2e61a7a3d126c5c98156867cbf181. 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/QZTB22518372.