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 0x1c82235d4295ae3fb9a1ad96ed2b4c55d66537dd4c409c5c802d89203816118b. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd0b7e39-2345-4486-bd98-5dd8ee836e40.json and https://artists.proofprofile.net/proofs/artist/dd0b7e39-2345-4486-bd98-5dd8ee836e40.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Es gibt nur ein Berlin … Die Lieder von Willi Kollo in Originalaufnahmen (1927-1946)
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 0x57461019723e70b05a174c2d4fa93ac0a17c0421abd9ea9ae2a934f30f2db9f9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEL111301212.
Zwei in einer grossen Stadt: Zwei in einer grossen Stadt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e24f2ea55f16304874f12da191da70af4180eeaf92eb784705d4616986514. 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/DEL111301216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ffa90c53ac13bf7e101a758dfacc98a7a02347238d2bbcd9cfc3d8a98921d. 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/DEL111301218.
Wir tanzen um die Welt: Einmal wirst du wieder bei mir sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c4abc419091a39c52f57e2e6012a72f234b139d500a45b49d66b999eb5831b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEL111301215.
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
Mit Musik geht alles besser: Lieder und Melodien von Werner Bochmann, Vol. 2
Sophienlund: Mit Musik geht alles besser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395e4d3db1675d6e279bb0c0dd6e68f06561772261155f20f0694c32601dae39. 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/DEL111300371.
The Golden Era of the German Dance Orchestra: Adolf Steimel, Organum Tanzorchester und andere Formationen (1939-1943)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2391d4790b6273592600b21485b819b42ef3fb2f0d9fc73c3822e9ac771b1794. 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/DEL111300343.
Anita und der Teufel (excerpts): Wenn mein kleiner Teddybar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a92e536d41cf8396f9cd32d589779833732f39ca8000738ac40fddd803a347e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEL111300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb901cf014def51865cd6e412675986fe85dd093195da4e35b5f1fa225106ead. 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/DEL111300337.