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 0x234246479aa2483d5942a368b91c024c1939cd68274eb8255cbcc13c2cce619d. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/308289fc-424a-4642-b633-e53284ba7cbe.json and https://artists.proofprofile.net/proofs/artist/308289fc-424a-4642-b633-e53284ba7cbe.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 0x52ceda79857643c65795fd38ba73e9b670f840503e45beac04d00b42f6699350. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/TCAJE2579822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe522e6e537b131f8dcfc20e1b10532d54c370050bc8c09a2ce7774de3794a993. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:12:58Z), 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/TCAJE2445466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9174fa4966ddcba806464c97bdd1ff1f535052ce05293c00cbb163510719c02. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJD2445499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd2dbf25a60326a0dc4f1c99d25463370c49743a3e091d3b0a8141a5010a8df. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJN2546021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c52e111dfc90e0c81506e9b7d21be2132a2e0243345169f66162142a9b0f56. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:18:48Z), 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/TCAJN2546047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448027eb5acce7a6c0372721a64c109201db57454b7738788166d1645dea93fc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:16:39Z), 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/TCAJN2545932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d367520e73bb836e12d24b069de30908e6a0bd2172f4f7a3231be1c206e4c4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJN2545941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4acef3bd02cc5af6b9df24bd8bffc46f2eb771bca7cb41edc1b48ae030894a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJR2540455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5ac30e33a96f999e5604ad839b5f9b17762853ad486d91c3d07810c2cc135. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT65Y2589599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d4774a74f7e18a4b2a604e26292ba436b4e24c97b1644a54dad2201811c0a7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:51Z), 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/QT65X2544282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e1ebc8c17b0e6bb36c6066f81f43039b7120a2007ce3129ea787a3f05e8238. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT65X2544552.