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 0x6b03c158190dc70d169e3f5bfaf5e86e979aad2090b7f4b5239d930239e2f9c8. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0223c1bd-7899-4afe-ac58-1934533f08df.json and https://artists.proofprofile.net/proofs/artist/0223c1bd-7899-4afe-ac58-1934533f08df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
History of German Film Music, Vol. 3: Glückskinder (Fortune Kids) (1934-1936)
Mit Musik geht alles besser: Lieder und Melodien von Werner Bochmann, Vol. 2
Sophienlund: Mit Musik geht alles besser
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 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.
Glamourwelt Berlin, Vol. 8: Die großen Berliner Tanzorchester (Berlin Swing and Dancebandsfrom the Weimarer Republik to Second World War) (1933-1944)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0967463634cd379e98ee3b63d6bfa81c222d3d4514e15cb58c3078ae533d5729. 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/DEL111200529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186cdc672397540309b1ce88cefa35af9e07c84078ce030cde6994a0c1a93ee2. 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/DEL111200530.
Melodie der Nacht (Melody of the Night): Tango Marina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdf074dc6e487716aa486740b7ff131eadbea6c13c0ee582706dd32023e131e. 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/DEL111200531.
Clivia: Clivia: Sie sind mir so sympathisch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6737d7a3a0000dd135f064646d0eaa4c29c6d8f845c3054653fd637bcfc00fa1. 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/DEL111200532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4949848733bb9d730c7270a23b6cf7e7eb6672518456ba235509dc1b1fa812. 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/DEL111200537.
Gasparone: Ich werde jede Nacht von Ihnen traumen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6705549d0d5b0e570c90ab1e3b9877796048481d55cbfd4dcbea44cbb9a4e143. 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/DEL111200540.
Kleiner Mann, was nun?: Kleiner Mann, was nun?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f21c8237c6d0c80e95178d785f58197f94e38e1c48c8ea66c5f88cc956a4c5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEL111200544.
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
Heimat, deine Sterne: Lieder und Melodien von Werner Bochmann, Vol. 1 (1933-1943)
Ein ganzer Kerl: Abends in der Taverne (At the Tavern in the Evening)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdf1e28da8e3f38abac443a194daa33eea67954dc63affd6378c8608053cd3c. 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/DEL111300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc801ebb6f2c4391d7b7dbe1df0968fac5596e28a6d261b60bea0b936a5aeeb9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEL111300363.
Bei zartlicher Musik … Die schonsten Melodien von Gerhard Mohr im Originalsound der 30er Jahre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf39b8e5d1b0905636ef2e8cdaecdf9cc098f2ce232a52f49746686c4382bea. 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/DEL111200771.
Ich kann an hubschen Madels nicht voruber geh'n
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d8efe512d3e0bfffb2162cca4a7692d73857102f0027867c74d30e6e72a5c9. 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/DEL111200781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3392aaa6f75d936903981e17dc438fc1b131a98daa822c49af328f3d332c48ca. 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/DEL111200782.
Die besten Hits von Fred Raymond im Originalsound, Vol. 2 (1934-1943)
Man müsste Klavier spielen können” – Die schönsten Melodien von Friedrich Schröder in Originalaufnahmen (1937-1943)
Immer nur … Du!: Man musste Klavier spielen konnen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8f7aa90f9099a780ed8a269571c5cef94ecac37f19cec0774821cbc4ccb0b. 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/DEL111300097.
"Ich hab' das Fräulein Helen baden seh'n"Die besten Hits von Fred Raymond im Originalsound, Vol. 1 (1925-1942)
Ich hab' das Fraulein Helen baden seh'n (I Saw Miss Helen Bathing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10393cdf52be5fc4a8ba08d9b5c1d15b186133c784eb78fc42e2f9f09224aa2. 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/DEL111200792.
Weill: The Threepenny Opera - 6 Songs - Und was bekam des Soldaten Weib - Wie lange noch?(1928-1944)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80188eefbc2fd61e94eea8a2b4398cb38b46c1665e03edabaacbea6f13fd2f5f. 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/QMFME1456166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49414002215230025943637af170f5436e5204925608a8e6369233162fb8e6a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEBL60539137.