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 0x137b3f5edebe2bcd911aac75fdadbcf0e3b089f3a3ecaef0b3a79b704b2daa5d. 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/a8c82f0f-eb68-4dec-8616-eb3a6d8847fb.json and https://artists.proofprofile.net/proofs/artist/a8c82f0f-eb68-4dec-8616-eb3a6d8847fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nussknacker und Mausekönig - Der Weihnachtsabend - Teil 04
E.T.A. Hoffmann: Nussknacker und Mausekönig (Reclam Hörbuch)
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 0x2cd43b2451c160e52554320374bf45648f1d47e5d57b1a45ccb2551824a7308a. 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/DEA811800156.
Nussknacker und Mausekönig - Der Schützling - Teil 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25544f9efbc15a6ee06042daeecfca1b2cbdde12b9ee3117c7d9bcdecdb1b32a. 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/DEA811800164.
Nussknacker und Mausekönig - Der Weihnachtsabend - Teil 01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd32798a881fc04283a2b2c897ab31993e7187161710903de7bb59716dc2813. 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/DEA811800153.
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
Nussknacker und Mausekönig - Der Weihnachtsabend - Teil 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba2fd1ccd451be15bc056b2e9fe7890fd6d0acca04844aa140a264a518ad5a0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEA811800154.
Nussknacker und Mausekönig - Der Weihnachtsabend - Teil 05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179362016ebf31f6e4cd808429331245fd99001d5cfdefdbe5657ebaabf0ca85. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEA811800157.
Nussknacker und Mausekönig - Die Gaben - Teil 03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6070b30909a2c95ec854222a2c3c8cdd24751b69add1241f53ee4fc162ccee7b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEA811800160.
Nussknacker und Mausekönig - Die Gaben - Teil 04
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb08b4ae0b4ac75fedf1115a9a2f772597e4f3f0e51fae179b6ab8ebdc79f06c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEA811800161.
Nussknacker und Mausekönig - Die Gaben - Teil 05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcc11c3555c1d2dd9bfabaa9c40c02b7de54ddb38e067c68bf5ae183bbbbc09. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEA811800162.
Nussknacker und Mausekönig - Der Schützling - Teil 01
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1908fddabb21c887d5f521d46e08948fd7b25d998e4b9f1dc72eac3573d277e5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEA811800163.
Nussknacker und Mausekönig - Der Schützling - Teil 03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb863f2b86745d4e59cdd0108c67bba953b3dd0832f6b377a6895005f98e6ee5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEA811800165.
Nussknacker und Mausekönig - Wunderdinge - Teil 03
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6e5e21314f645f49015f3f2cf212e494ac8c23db3484adf53f1b3c150cf870. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEA811800170.
Nussknacker und Mausekönig - Wunderdinge - Teil 05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53983ff7ff70d6508e1fb7cdeab962f2b4276a4139f66a9565d3c72d162bb3b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEA811800172.