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 0x8e937312349c682745e2ae8dcfb95cbf0cebebfb3f527256fe9f8ce4d011a300. 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/2336ff23-2008-459f-97d2-cbf1f6d5101f.json and https://artists.proofprofile.net/proofs/artist/2336ff23-2008-459f-97d2-cbf1f6d5101f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dixit Dominus, HWV 232: VII. De torrente in via bibet
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 0x5fe6dcecc79d90f41174f454ded129e3c9d7000c23791c9a9ebe9af0567ff676. 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/FRZ207602207.
Alceste - French version, 1776 - Act 1: "Dieux, rendez-nous notre roi...O Dieux!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09fc280e7980be7c29a9a92a8a417a7663d3be3fb15ea282201864ffa2ae1fa. 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/GBBBB9905702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82390e678e89c9dc77eb807b8d8e40db8b25fb4de22584c6465a2fc697a54810. 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/GBBBB9810203.
Dixit Dominus, HWV 232: Die Torrente in via bibet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d6b6130bb2923e4f44dd53a35540bcec3842c76288bfae9fdd899940f7ce69. 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/GBBBB9810220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41189236350852bfcccc34e54122d0df0d6193333d634f338294ee854ad11b2b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLA509803901.
Ich hatte viel Bekummernis, BWV 21: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87808a12cf90e65a56b3a29747952a219d545b791816017e4cc02573b540103c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBHNG1001069.
Alceste - French version, 1776 / Act 1: "Grands Dieux!...Suivez-moi dans le temple..O Dieux!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3103b620d01e26cd4d6147549b380502109f59575a09d1f019490225ff227d. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBBBB9905704.
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 0x32d373acc39d5b6998630a03dbf66a3f09806c3b59e932bdc2b3c5246c7c9f79. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBHNG1001070.
Ich hatte viel Bekummernis, BWV 21: Aria: Seufzer, Tranen, Kummer, Not (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3b010e2fc0dcec41a14c34d80482eeb7044952d544a931d208fe5e98f71ad. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBHNG1001071.
Ich hatte viel Bekummernis, BWV 21: Recitative: Wie hast du dich, mein Gott (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4756c8a6773f0f2d396f05bc4a52387911ba3feaba792f3c1097b666e2776eed. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBHNG1001072.
Ich hatte viel Bekummernis, BWV 21: Aria: Bache von gesalznen Zahren (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc06b5cc2f661e34fbfe7dd0e4535db4f5a69ee0d5d0fbcd1dc5591b244c4a3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHNG1001073.
Ich hatte viel Bekummernis, BWV 21: Was betrubst du dich, meine Seele (Chorus, Soprano, Alto, Tenor, Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbb371213238f2718034c216ee54ec121a395ee31f82d75dbe3ca11529ed4f7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBHNG1001074.
Ich hatte viel Bekummernis, BWV 21: Recitative: Ach Jesu, meine Ruh (Soprano, Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0b3c469b7a8d2b499fc744d99204430bd8dbdea1308ce2eeba8ae59eda972. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBHNG1001075.