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 0x5dd2fae18dbb34a3a41525a7db3be4f1bcbed185f35f37a1c6f090fbb5ceff14. 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/840f533a-e3b8-4b9a-bd20-5b409143635f.json and https://artists.proofprofile.net/proofs/artist/840f533a-e3b8-4b9a-bd20-5b409143635f.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 0x1198290e73dabd50e1cedabe6ba006f14e5f93f3e03264fbd89bd3ca4cf89cce. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ARF030200344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f36d5a6ded4fae03c2b8f1ee46b9ec751bd91fb5d4920a95a2b2b989f2c16. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARF030200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57487579260677e43ef2dc4ada4257511ff0a8478448d67618f939f889aee308. 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/ARF030200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26743424e72ffb1463b29da6139de6e90a39aa492418785386db405e2872a7e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/ARF030200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60c3ae709bfb5f9fd70ebb442170efb21f3759bd064046b5094148f28835a59. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ARF030200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f36d5a6ded4fae03c2b8f1ee46b9ec751bd91fb5d4920a95a2b2b989f2c16. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/ARF030200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed6c475375d16bb6dfd7ad1badc002e887a4ed3034e3c779ab4e900b259d96a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:22:46Z), 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/ARF030200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde529c4a3eca1aace32dce75c5cfca51c64bfe8db3df862fe5db992c46e28170. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ARF030200351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596543cdfc3855c986ac4496614e402ecbe777cd20bb645e04fe8c1ba5f92f9. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:03:44Z), 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/ARF740300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc5ef168ef80abdc9f819a1ce9e04dd8fd3f68315f4a8ad0bf834f98edeff35. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ARF740300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d49b4c65fd70b295beda89bc3b294c50a6e15143ef07b26636c2d6ff4724d9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:00:46Z), 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/ARF740300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7befa94973fbed69900b101fd035248f7fc5597c4a67e8181ad4d32b28ac035e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARF740300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a779f130223d2f13f1bfaacd028f30f17804f43e0c1bf06aa0c6c6f3c23802e. 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/ARF740400056.