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 0x23c34e881dd9fd88b61f7ac4afa2a67b50562208c41ff393083561b7e9d5d87b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41f35538-0386-4e42-9f27-bbb9c88beb47.json and https://artists.proofprofile.net/proofs/artist/41f35538-0386-4e42-9f27-bbb9c88beb47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Meischter Eder und sin Pumuckl, Vol. 4
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 0x9ab06e05c2835d364bb041acc93fa10375a289b37dfc946b0cea654de594be09. 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/CH0042201015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d808850e9317fd79c8d4a5ae6e1be233e2b49a9fdaa36cc0ce4d07c6e847b4e. 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/CH0042201016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31f82bbf4b6c8845f9daef4402b19b29be4f2d29dd3018929702f229e539ca. 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/CH0042201018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a79e622aa6a7369f28c74fdb3c37f7c797a521a3e3915991207c60b7f70cc. 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/CH0042201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33530d636a2e7a522c6f68f4be61dcaf13d353e28f61aa4fed8c42ca110fd793. 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/CH0042201017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98705d462aac0f79e189cb1fc7791d7e5931c0de1132bfdd296482eacd9c0381. 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/CH0042201019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3353a5ac5cb10e288c9d1560337cc8bcbd7941c7e04047e7b1e59f24fc2b589. 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/CH0042201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b313529a8d40d0fd790f0b326a9f5d21ee066daa2b3411e93b97999a917976. 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/CH0042201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80579829257bfa5a0f7bf63b533de9d0c3b44b8797982a6150d567917daed10a. 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/CH0042201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104f59cbec6b25cf2d913daaae966e2a1d569347ebea9c36c109714ddbb84d3. 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/CH0042201024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1624b5f2d74926a302edd49110622a18c44ae3b1e543d297389cbdd8d3871d0. 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/CH0042201025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a99fadb31f71b1589760b9ee24c059a9d6ef0b7e438c6d95c0e4e7d6e965c5. 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/CH0042201026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ebccba888c4f83e18ed85a61ab4550199bca2c8452ba6296368724173af1b. 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/CH0042201027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cc683d8c036b53ea608c907608d93f9f7ea586f1fd12711150ceaa00f48d79. 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/CH0042201028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43062df24b5993774f09254e6fc0b3211f9ba3340b3643005a07d14ed982f040. 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/CH0042201029.