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 0x3e25e3d08b6893bee784f683abd78f61c7a8557ac2fd8a259d837510e7706724. 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/e54edfde-d34b-4e7b-a5e4-599cb90ae8b6.json and https://artists.proofprofile.net/proofs/artist/e54edfde-d34b-4e7b-a5e4-599cb90ae8b6.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 0x8e5e8cd95489d0c448f0419e5da7f703855b983d523ec954065a7b051da4b1e7. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/ES8241125604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de0ce789ae3bc1e769d92cfaba9cfd447185538a2e0539bdf882e5e393599f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES8241125601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6a473036e592543461ac0fa6f192f7f2ed6cf0b8ab2dd88da42e1a0ceac8bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES8241125602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d826a80c212aee43a2421df787a6d1c7a47cb31af974c6a68a44ee44b0e8bde. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES8241125605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8491c87980abe5bd6144b968edee28a253f154ba3339305261664cf97cf66eb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES8241125613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e8cd95489d0c448f0419e5da7f703855b983d523ec954065a7b051da4b1e7. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:36Z), 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/ES8241125604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b002858e34ee1f187897578a10924480867343442b996c573981f87e4d7c21. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES8241229302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5538bef4a15f7dc7f2efe81f9f8cc86808b0018d0de04e31eb9014976c90d8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES8241229304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63042dd79b4f847524b2ea35bcf33c0fb65622fe75bd1370bb7ba025fd8c2098. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES8241229306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d9484ed528d96427662c3cd822b997aab01f859a6ab4151329df02993d7fd9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES8241229309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d186fa848ccf40c96be07d2c69a5bf34c7f880efe769682631b4d48040f73ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES8241229312.