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 0x9f1ad039db0ac2723b58de7a7da79be44bb368c5fdefb1f40930a1b1d87b278e. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f527282-07bc-4af4-875d-f8b88fad4fb2.json and https://artists.proofprofile.net/proofs/artist/9f527282-07bc-4af4-875d-f8b88fad4fb2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die lustige Witwe (The Merry Widow) (2000 - Remaster): XI. Rezitativ: Nein, nein, nein, nein...Mein Freund, Vernunft! (Valencienne/Camille)
Hanny Steffek/Nicolai Gedda/Philharmonia Orchestra/Lovro von Matacic
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 0x4c851073235ef60c262aa4214d471ff47a134f9d4537ec379a87ce80f1141376. 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/GBAYC0001016.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Wie eine Rosenknospe (Valencienne/Camille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aad5a62f304018589e1be7967a1ac338e14ec0e5afba2ae77b574ceab4f3ab. 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/GBAYC0001017.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Sieh dort den kleinen Pavillon (Valencienne/Camille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9b48daabf6dbf838407c11da149aa261afd1717d2315db041b9c46031a357e. 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/GBAYC0001018.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Rezitativ: Danke, danke, mein Herrschaften (Zeta/St.Brioche/Cascada/Valencienne/Camille)
Josef Knapp/Hanny Steffek/Nicolai Gedda/Kurt Equiluz/Hans Strohbauer/Philharmonia Orchestra/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2958406e812ef15c8509b0a3d7464ebc5ada6967dcd5f69d55f56359e4d9729d. 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/GBAYC0000993.
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
Die lustige Witwe (The Merry Widow) (2000 - Remaster): II. So kommen Sie! 's ist niemand hier! (Valencienne/Camille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3108a0307b08805cfefe5f6a6a0090de4862a8241a65728542ff3eaabe025d. 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/GBAYC0000994.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Ich bin eine anständ'ge Frau (Valencienne/Camille)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c21b818ef5b233dc067a23270fd63d5f94804f69afaa863e42e59b5f4b9c0aa. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYC0000995.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Rezitativ: Gnädige Frau, ich rechne es mir zur hohen Ehre an (Zeta/Camille/Valencienne/Hanna/St.Brioche/Cascada/Herren)
Josef Knapp/Hanny Steffek/Elisabeth Schwarzkopf/Nicolai Gedda/Kurt Equiluz/Hans Strohbauer/Philharmonia Orchestra/Philharmonia Chorus/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16664fcb7a28781520f07ec6600ec782a1adeb73534b78e1ae7789d248d9067. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBAYC0000998.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Hilfe kommt zur rechten Zeit! O kommet doch, o kommt, Ihr Ballsirenen (Danilo/Damen/Alle)
Josef Knapp/Hanny Steffek/Eberhard Waechter/Elisabeth Schwarzkopf/Nicolai Gedda/Kurt Equiluz/Hans Strohbauer/Franz Böheim/Philharmonia Orchestra/Philharmonia Chorus/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be1a66783ae28e8a3878d3e9ca864a7b6ca5be7cd328f6f0b6deb53b12c37a8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBAYC0001004.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Pardon, Madam', zu viel Reklam'! (Camille/Hanna/Danilo/Valencienne/St.Brioche/Cascada/Herren)
Hanny Steffek/Eberhard Waechter/Elisabeth Schwarzkopf/Nicolai Gedda/Kurt Equiluz/Hans Strohbauer/Philharmonia Orchestra/Philharmonia Chorus/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38431e2823d66221190421561853395e0685881743e0e191f485e4f6d94b060. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYC0001006.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): XII. Ha! Ha! (Danilo/Zeta/Hanna/Valencienne/Camille/Njegus)
Josef Knapp/Hanny Steffek/Eberhard Waechter/Elisabeth Schwarzkopf/Nicolai Gedda/Franz Böheim/Philharmonia Orchestra/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a425786cabf598e7ad626e80624321c30f6c73d5ea5678dd1da8ab81967f3fd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBAYC0001020.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Wie eine Rosenknospe...(Camille/Hanna/Valencienne/Danilo/Zeta)
Josef Knapp/Hanny Steffek/Eberhard Waechter/Elisabeth Schwarzkopf/Nicolai Gedda/Philharmonia Orchestra/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff32c4beb1066b777fbcb1a126f1f49a2fd4e07b4f234ce981a6a230b21d58. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC0001021.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Rezitativ: Nun wissen Sie, meine Herrschaften...Den Herrschaften hab' ich was zu erzählen...(Hanna/Chor/Camille/Valencienne/Danilo/Zeta)
Josef Knapp/Hanny Steffek/Eberhard Waechter/Elisabeth Schwarzkopf/Nicolai Gedda/Philharmonia Orchestra/Philharmonia Chorus/Lovro von Matacic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e506acc7098dd339e010c571c2abab764e7c013b0d458b430b3ddda97a8e95. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBAYC0001022.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Rezitativ: Meine Herrschaften...Ein flotter Ehestand soll's sein...In mir tobt es, in mir bebt es (Hanna/Camille/Zeta/Valencienne/Chor/D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f4664a4d520fdaa7d954c47e487375fcfadd7424553870dbc4ea34c7dbc25c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBAYC0001023.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): Es waren zwei Königskinder (Danilo/Hanna/Camille/Zeta/Chor/Valencienne)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37992c3e1c61ae826a268873d5ecd78296debe4ea8b38c1e18709081ee20fd1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBAYC0001024.
Die lustige Witwe (The Merry Widow) (2000 - Remaster): XVI. Ja, das Studium der Weiber ist schwer (Alle)
Josef Knapp/Hanny Steffek/Eberhard Waechter/Elisabeth Schwarzkopf/Nicolai Gedda/Kurt Equiluz/Hans Strohbauer/Franz Böheim/Leslie Wood/Eilidh McNab/Christine Parker/Noreen Willett/Doreen Murra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d23809b097ac33003fc3a2113b42dd236172615b3921bb8785c04143e677ff. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC0001031.