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 0x9cb53794d541ac2de369b1757430c7a1cf6a4d0aad1cf027d47bc88ec4bdb4bb. 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/e8135b36-7ac7-4511-a864-e79aade5d8ca.json and https://artists.proofprofile.net/proofs/artist/e8135b36-7ac7-4511-a864-e79aade5d8ca.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 0x7a21c8e58eab5b8f46917774b8e90ada9f498268d0a0952430e221617c7877fc. 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/ES79A2115103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6fc186aed682dd06bd68084f2eb3ca085b6b1e722a2659e6959e9d7e76af0. 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/ES71G2220506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb007a156eae676af32943d67d51f274fe201018dd05fe04f516f160fe36945b3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES79A2115102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901ba62b8c60b921859e31c2b9f2630115a285b5867970045ea713245c8ae79. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2242313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b622759f02ef54896e0683b65281b26322800eaeaea867988eee94f38bef99. 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/ES79A2115101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46400acf6bb5fffd1db819757f2fcce376d2b6f4fc9dd1c0587c843ceebe93ea. 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/ES79A2015102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68a849ca02879c9f06cc37a52c0bf1502aedfe879a2714e6ed7ff545866d9e7. 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/ES71G2242317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616c6c2e94f0fbc330b2a2bb8dd488b461ccdeee6482a0bb3aee31154c616779. 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/ES71G2242318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5d1c89d88bda988f9a684dd3915b88ffcb9f4e9d7af4276f889a56fd54ce2. 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/ES71G2333968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38ab5ad33f54512ba07b1b81ed06ea8572cac212a92af3d3ef111d719854cc0. 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/ES71G2326270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6fc186aed682dd06bd68084f2eb3ca085b6b1e722a2659e6959e9d7e76af0. 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/ES71G2220506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21c8e58eab5b8f46917774b8e90ada9f498268d0a0952430e221617c7877fc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES79A2115103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb007a156eae676af32943d67d51f274fe201018dd05fe04f516f160fe36945b3. 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/ES79A2115102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b622759f02ef54896e0683b65281b26322800eaeaea867988eee94f38bef99. 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/ES79A2115101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46400acf6bb5fffd1db819757f2fcce376d2b6f4fc9dd1c0587c843ceebe93ea. 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/ES79A2015102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d48aa02ddbcdb98338767c86fb4721550eeb67e6058e491cc4fcd43fc804ca. 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/ES79A1915103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d05ab18cc795b3bd05b210670b71024c9c9e8a93e02bbec90c66ab71ff2eb. 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/ES79A1915101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d05ab18cc795b3bd05b210670b71024c9c9e8a93e02bbec90c66ab71ff2eb. 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/ES79A1915101.