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 0x6d558564df3bafe70038ff92055cc8ffa6047e8845f41d40f906db45eed12813. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2220a565-6363-470b-8576-1d520d3bce1d.json and https://artists.proofprofile.net/proofs/artist/2220a565-6363-470b-8576-1d520d3bce1d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad67504b20570b9dfff4805d272a160a0542c9cb96d9947f79d4523d6d35102a. 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/GBLGL0968123.
Schlager und Filmmelodien von Walter Jurmann, Vol. 2 (Recordings 1929-1936)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e5fc8d3777979c98ac01e316bdb33d0b253df577ee77164fc429f1520c7103. 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/DEAD61607802.
Nur nicht aus Liebe weinen (From "Es war eine Rauschende Ballnacht")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d673476c32185059fbd174ca77770951a115f1aa5d451b65bf00fec0d28c3d6. 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/DEAD61607803.
Wochenend und Sonnenschein (From "Chasing Rainbows")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40471f08e0149c270a69534b8ae706adb019ea21273dd4dda0a1e15af27ea0. 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/DEAD60904150.
Ich bin von Kopf bis Fuss (From "Der blaue Engel")
Friedrich Hollander Jazz Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6759601e20195ee353a13755ed65e36b386e3735b9c148467fdd25ef495fa7e8. 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/DEAD60904163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93197ccb868b65a9fe381f4357eb0d438c1149adab67e4bb3b5ccc745809b59. 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/DEAD61607825.
Im Prater blüh'n wieder die Bäume, Op. 247, RSWV 166
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20acd328ac0b40f558b4a2cd8106aa1c5af308b274d524e19e3bcf5795473f99. 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/DEAD61607806.
Viktoria und ihr Husar: Reich mir zum Abschied noch einmal die Hände (Sung in German)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecd39a2ac13d761042652d03473543daf0375945c2d2247f9a06d5a198ed662. 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/DEAD61607828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844fd24c07fd2affbcb8579433a89998b71fa284b9a6a9cb5530d34bf8be57d9. 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/DEAD61607809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29de7afc95b9ef781535577f80a90b38c9f9a8e2a64283ca1eded32339a05554. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEAD61607829.
Fahr mich in die Ferne, Du blonder Matrose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ff183cab717fbd8f01a5cb598ac32baeffc3892e2fd978bc1673d0b7483e4. 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/DEAD61607832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d9822e877de8b410c72c65a2f4a840db11a989667fd4f367aabcc0870823a4. 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/DEAD61607813.
Regentropfen, die an Dein Fenster klopfe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69d63fbfa3d7adf854187a78c8e246b9b62cacabff913d18c1405e2668ec728. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEAD61607833.
Icons of German Cinema: Pola Negri (Remastered 2018)
The Original Filmscores: German Symphonic Soundtracks 1940-1956 (Remastered 2016)
History of German Film Music, Vol. 3: Glückskinder (Fortune Kids) (1934-1936)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea95ec1ad4166f2f6045d0d4c5ef80f98785491f2dfba3963c964574f646fbc. 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/DEE378900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9030d56defdfa1cb6babb4f3d4e7f5a6bdd4b1e1953f639e60dca95af9c18965. 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/DEE378300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a43b78993743ff9a4828ee86eef33f2adcdcc6d8a471119ad66f0754726ec0. 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/DEE378200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02c9c6aaa3bf705b4a95920b74bf981c3100ba876c37a39c18f8649bb7733db. 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/DEE378900350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6480aeb27c7e542f9949f4181ffc8bfba2f808d6d381715f8cdc78816209b092. 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/DEE378200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fd590db926e2c140f053fbfda0d8f91eda238b105bb8df8a9a5e23b084112b. 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/DEE378900280.
Swing-Sinfonie: Willi Stech und das Tanzorchester des Deutschlandsenders, Das Deutsche Tanz- und Unterhaltungsorchester (Recordings 1942/43)
Der Abenteurer von Paris: Ich und du verliebt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3716ce2cdaf8ba73e32677f63f5f1f21c798823ba3dec045a6a6370a5d8944. 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/DEL111200665.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe, and the World, Vol. 2
Ich wünsche dir viel Glück und Sonnenschein
Das Deutsche Tanz- Und Unterhaltungs-Orchester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0ab33c31063e65fcfc7a094a2fef2649098f54044a612b9854e69190297cfb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEL111800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc72467f7873c384c4b2c28de20842aecbac7818da5d80cd3b5f5c27883b695. 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/DEL111800324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc40d48b1ad6ab0e0135a2b0623bca5c5041f5f8c6af5ef11d492c231ef4ad87. 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/DEL111800310.
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
The Golden Era of German Dance Bands: Otto Stenzel und das Tanzorchester der “Scala”, Berlin (Recordings 1936-1939)
Treffpunkt Filmpalast: Traumfabrik der UFA Jahre