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 0xe0f517f603a0d2de8b5c7a1e693ecca0373328d0260299b6bae654782419553b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bff56b70-a11d-4b38-bc7e-96aaca4c9574.json and https://artists.proofprofile.net/proofs/artist/bff56b70-a11d-4b38-bc7e-96aaca4c9574.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 0x776523885db6c79c442371641e2205e80c6c8009e73617759b6176857b6b9e55. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES5021901595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c242676422a949485956edd124cfa4dd12abb56d69443811449f426d721b24. 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/ES5021901711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda77df3d828bb2b4566d73359d5854db03404f8e0a68fe7816442122f3cbc5b0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5022500687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e86c94ebc13d35835fd9a6315fa7d8a78f8b2d43c5b7aaa1646b23156ca0312. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012095921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a9258264723874f81a52d1ff9958a02fe1c4c5b27cbacb8408e49d53bae58. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:57:15Z), 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/ES5022000709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e26dc030ed418ebc3a908b54d36fb37a3d595d74fc530f2a324f24c408825. 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/ESA012217278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e40596deaddb2dc809ca782ebecb50681c796e6c5ecb0dcb609a1f575262886. 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/ESA011667903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c6144eb2793e1f38049a593b92c91030564620a15e8b572ce4256ae99b4ffa. 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/ES71G2030471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118db2f491fd9316cd19c8fd8f46a881d873afce3dce95a91b7eb4a27cdec8c5. 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/ES71G2025575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b22de59a3acc6ae27fda3c06c1d3059db354af50828101d618c28182053aec. 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/ESA012095536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a418a4d993a628515f32983d0e025caff0ef65f4fa18dd788aa75cc5d06ef1c. 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/ESA012095220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469ea7fec7099152ea30b9d0cf00bf35fe2976d59fa48a5eb871dc07de2345cc. 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/ES71G1918639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb88c4cceff50f2421beb755e38ac47689f2753e57771ece17f0ae9e41b888ac. 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/ES71G1923560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84be2da06180f1e454d3b0bf83866782b05d5afcf3149b582648f86e0bd222e0. 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/QZ5FN2086583.