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 0xddaf8a9bf56f21bccfdfda3a1619bd184d251317559ca42b4e65e6028ad87eea. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/768a708e-348c-41e4-8dcc-0662c810a8f0.json and https://artists.proofprofile.net/proofs/artist/768a708e-348c-41e4-8dcc-0662c810a8f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 13 (Remastered 2018)
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 12 (Remastered 2018)
The Golden Age of Light Music: More Gems from the 1930s
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 0x2637fb98fb92168bc01153851da1358182023183db390707582a127104752153. 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/CH6631552501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1445ce0a86443c681df0504e10a2166db5b9fa057ec753a07118738037401b0e. 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/CH6631552517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e22758887cff173f9658204ff8563277074aef37db4e0d96b8f70c56a38df9d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6631552520.
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 0xa191d6cac7537947c69bfd2cc1a3da67962559b2aa257541cfab9c429e9bb73d. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/BEDO62316650.
Reichsmusikzug des Reichsarbeitsdienstes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdff62ba0ef68156a23c936fad7895dafaf4deda0cb6ef795099d41d2511f5d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BEDO62316656.
Musikkorps der Fliegerhorst-Kommandantur Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa074bb37d1afdefd3d5a3e4a9c34e9fe73d68d4a67180d74ec456ce7b7e6a29. 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/BEDO62316657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f6b394ee706c7837fa8b1deb2a6214eec350e74a5b73b23d299488c5b77626. 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/BEDO62316658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4d61078353a17c435f7b45ac98f396422fba1cb60008cb62fedf61d94e0ff2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BEDO62316649.
"Freiheit, die ich meine" (Märsche des Reichsbanners Schwarz-Rot-Gold)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a5d75140e1cb1060fffe6403c79e144f12d4ca5291a5bff0e59389bc8c18f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DE1JN2446759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9121552ff0473dfad5c19d1c762b2bb65bec1fc6366bea75a14f097bc825695c. 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/DE1JN2446648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b55a75a5e5e49c236571fecbc25b70df950b8a39487912e10628a079ea6e13. 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/DE1JN2447030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f8046c0ac4610d1aa49f59aa1420c3223629f6840111370f710dd38c0f200e. 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/DE1JN2447019.
Freiheit, die ich meine (Republikanischer Zapfenstreich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752c1645095a4fd7c662d8ba97f03c83a0c4fba3d5b94fe7c3084f33c2881ed1. 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/DE1JN2446664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66624dc53f578a6cff8fa0c7832a74bb5d618935c6888c838916dfd9edd373. 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/DE1JN2446684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9db484cbbd15850cf3282f969a287a0a8538c247d1e97c72c3f02cf195f30. 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/DE1JN2446776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe8a1a5606ec85b42004c5ebbfabdca305ce02b687013597e0f48c20556cff5. 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/DE1JN2446655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b7ccc83ac1967d19adaf901952bbe69d3d87efe81efe4e2b84873610eca95. 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/DE1JN2447054.