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 0xff676af87c2d19f4f06ea7f9ce20cf28aa0570762f02048c1804340ebf094cb2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1231fc-dc1f-44db-b804-deb04697c10f.json and https://artists.proofprofile.net/proofs/artist/8f1231fc-dc1f-44db-b804-deb04697c10f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Herz Und Mund Und Tat Und Leben, BWV 147: Chorale: Jesus Bleibet Meine Freude (Jesu, Joy Of Man's Desiring)
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 0xc62a58458abc4e0a739ae98f798c108a06d18c91829c9d51a7dfcf09367fdbc2. 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/HKI199614101.
Anna Magdalena Notenbuch (Clavier-Buchlein III): Bist Du Bei Mir, BWV 508 (Attrib. G.H. Stolzel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9216ae57ab47c48da80475ad589df4097fa4e970956ccdef16a03a7fb6399f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199614102.
Serse (Xerxes), HWV 40, Act I: Ombra Mai Fu, "Largo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c0e8ad7f6dcb61990cf90105cdcd09c630f0ef6b01a06619004a1c23888928. 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/HKI199614103.
Rinaldo, HWV 7, Act II Scene 4: Lascia Ch'io Pianga (Let me Lament)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697aadbefad6b2b083d9600e75acef65c0596c3f289e051e7dd1f2a3be621817. 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/HKI199614105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb982b43d244de604561afe9e173731a57e8a05bebca91de8e9bfc58f22bd1f43. 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/HKI199614108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fe9b073c6199704b409bbfd2bead0959ed00c2782360726ef5f158a01788b4. 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/HKI199614109.
Ellen's Gesang III (Ave Maria!), Op. 56, No. 6, D. 839, "Hymne An Die Jungfrau"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe540c50c6988a639530333d2192231b21108f7f0f79dd7f93a58e649573b3b4b. 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/HKI199614110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f3fa8e26da5c9d8bc4fecce2517a20a05716db6965721c3c4381b8300a093. 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/HKI199614112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb49e1d670c7d6876d93acdf731458f10f1e88b1fff9a1f898b8893743e7674. 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/HKI199614115.
6 Songs, Op. 48: IV. Die Ehre Gottes Aus Der Natur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcacb3495c5f051d70726033707fd78a0148ebebd7c9ba3932d5dafe2f3b919. 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/HKI199614116.
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 0xc4570fdda368922af01e22891a5c5bb3092b3d6901b36c978554104a53bba55e. 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/USRDG0312528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01491fe547bff7011a853810e7d8ca4cd5d885fd82ec131c86c18a75c4649a5. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USRDG0216543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feaf847fc578383680790ff32ebf6e3dea3f1aac0ae9f640f7668fd5b6c70a3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USRDG0312527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df32b4aa3c0a59bb01b2e607a165d90b3b890d2a6618865e8d4ef26610909d. 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/USRDG0312523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42337f41fbe50966fecc7a37bac46daa06fc71e8725c5a4d57534bc1b853a4ab. 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/USRDG0216752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c0024f745127e397467f611ad9873b9e7302a3c011320c7dc8b20041ed7810. 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/USRDG1012119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086878c794a059d17cb59b5a8726341d22c2b8ae5edb114d8a9f76d2a660a7a. 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/USRDG0312972.
Musikalische Kostbarkeiten aus Deutschland 1