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 0xf2093750104bb806dae0a1a272a0983e3535471ea3b26487ea48ff2c18e26616. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15a8e609-b8df-4e54-9eba-6691ec441df5.json and https://artists.proofprofile.net/proofs/artist/15a8e609-b8df-4e54-9eba-6691ec441df5.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 0x3cc8c92595fdb92e3dbf5da61a87dd44e31112e895934ce284c6606f82eec892. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZ902400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b0b640d1bf891ddee9ae1396837595fcba317a86abc9cbcf303ef2571a902. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM72003983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b0b640d1bf891ddee9ae1396837595fcba317a86abc9cbcf303ef2571a902. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUM72003983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fcf038c677d3616df759a86b0f1f936b3e32e6aff1bed84e2db339690c6b11. 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/DEA340501069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9700a42578343cbeafff0b3fd687ca118890caaf55aa32147b3bca48dcf2111. 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/DEA811000088.
Das Katzenlied (ABC, die Katze lief im Schnee )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146270572b7aa72c1d8a417a6f3d32bb4b837df5592b8710d4bf9dabe6f3f226. 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/DEUM71503432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5b63cc95ef76025933253d4228f59480b6ad672d3b677b5ef8bdb3ef669025. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQR41400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a5d7281efa4c7591a9bd66f3d256e213d97bce3b87f3584e3af0109d343ec7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEUM72118831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73fc5a8d7f23754125cd9dfe34d10336ccd6b782fbc88d2bf8aa0f2306648ae. 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/DETO32100213.
Rebellion (feat. Henning Wehland & Dave Gappa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d33e620f93358897f19a42d6fb65ab4aaf8cbf3eda3b5f9efb75110dd75853. 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/QZDA62235370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d33e620f93358897f19a42d6fb65ab4aaf8cbf3eda3b5f9efb75110dd75853. 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/QZDA62235370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d9d259374cf2739d79a6c87111dead9aeeabc99ee7db6653304cd42132bb3b. 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/DEP470600109.
Bibi und Tina: VOLL VERHEXT! (Der Original-Soundtrack zum Kinofilm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf406c4edb6eaab422daa3a4d67eb81bee8b6aa8c61452906b0523c34fff8f461. 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/DEB582200463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cee09a83a92b3743e6d05aedd31fa3d3894326d85b288def7f14c5cc5209817. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEQR41400201.
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 0xf173f65aa4d16f735da44d6fac62297381115af6b57ab69453194fcc07f8605e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEC610701167.
Das Katzenlied (ABC, die Katze lief im Schnee ) - Sing mit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f30dda45e194806ffcb4cc9ef1ed1e041d5fef7f940bb0021f7665fc04a6aa. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEUM71503488.