thumb|Georg Caspar Schürmann, painting by Johann Conrad Eichler (1731) Georg Caspar Schürmann (1672 (or early 1673), in Idensen bei Neustadt am Rübenberge – 25 February 1751, in Wolfenbüttel) was a G
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 0xbf6b56fd4a67c12f2e118fd4a6c41a88877684820bf6351cf391bf04f4d460ad. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73b20592-c598-4cc5-9c7e-ce86898a7b23.json and https://artists.proofprofile.net/proofs/artist/73b20592-c598-4cc5-9c7e-ce86898a7b23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Provenzale: Lo schiavo di sua moglie: "Non posso far" (Lucillo)
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 0x352b3dc1130d6549f08d12ad101a1fe67421484edc590cc9c3c9c68627341950. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC2003382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a845fb4ebb66df68da9f5014a78c377b0c7c6cfbd629dd2633f998e40a218. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC2003385.
Viviani: Mitilene, regina delle amazzoni: "Muove il piè, furia d'Averno" (Mitilene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba45792c513cba81c351faa0f18def3ec134d52acf9149616a8c35932fa33bf. 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/GBAYC2003384.
De Bottis: Mitilene, regina delle amazzoni: "Io piango" - "Io peno" (Mitilene, Armidoro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697c60205d08f6b70ac5ee0cf598e4098a9f89a4dd5d123e7d14b5a07e035ab. 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/GBAYC2003405.
Pallavicino: L'Antiope: "Vieni, corri, volami in braccio" (Antiope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef612bd3cd9bc5fa3ec93c8cd53b553df69f247fe755bfe41d2d5793c4ab7285. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC2003386.
Pallavicino: L'Antiope: "Sdegni, furori barbari" (Celinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b30140436fdeec8de38cfa94ea518d6ce86e74c9cac81e47113fea33aca0940. 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/GBAYC2003387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec1cde8fdb511055f66034aa145a0766f38b13ccdf1bca8db8faf5a7280b699. 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/GBAYC2003394.
Couperin, F: Second Livre de pièces de clavecin, Dixième Ordre: VI. L'Amazône
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35b536673258bf7003cf27c9bd8f5d3287d7f783c46a304448b422b5e4dcef8. 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/GBAYC2003395.
De Bottis: Mitilene, regina delle amazzoni: "Sdegno all'armi, alle vendette" (Mitilene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5e949d8c19cd264867f15812eae67c8de7ed45c791a76c734fff3edf07a5d0. 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/GBAYC2003404.
Vivaldi: Ercole sul Termodonte, RV 710, Sinfonia: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d68b127994b915066650ea7dd7014706ffa07f399ff259e75312775cf4c2b2. 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/GBAYC2003399.
Vivaldi: Ercole sul Termodonte, RV 710: "Onde chiare che sussurrate" (Ippolita)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb30154ebc876b3d753094a07389a5872ee9b38d00257299f1fe268c7aed09c3. 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/GBAYC2003400.
Vivaldi: Ercole sul Termodonte, RV 710: "Scenderò, volerò, griderò" (Antiope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10729a43c3cad215f0455dac6205d2e8a40a79cde355e4a2543ea29d3fdfe8e0. 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/GBAYC2003401.
Schürmann: Die getreue Alceste: Sinfonia pour la tempête (1719 Hamburg Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476b768d9b664cf7630e51737677e78467bbf1217dc633f44a1a20b848c0e58d. 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/GBAYC2003388.
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
Schürmann: Die getreue Alceste: "Non ha fortuna il pianto mio" (Hyppolite)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0269016bec988f94e87f4ea8c6fda2a9f63281da3abdbecf4ec68167297d99. 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/GBAYC2003389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756c70f0fbe6048a33f5fef66ab444bf47c02f43975015977c5cc7ebb0c779d3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ140405250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1704e0f7d9203f29ebeda26b2b751314334d68d30427bc3840b16146dc439134. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRZ140405040.