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 0x181d2925c4b13793ff772100c4b90f85b5ea96b13cbff3ff913865f00669be4f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffeb8ca8-d9fc-4cb8-b23d-e3e5a8bdc5a1.json and https://artists.proofprofile.net/proofs/artist/ffeb8ca8-d9fc-4cb8-b23d-e3e5a8bdc5a1.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 0x44dc1b4e92e5c1b4767a95fe64a0d41274fd0f89fd2f1a459b40f4625ed1e011. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMBZ92069262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6287dcbcfa5124c20240a293dd2ed548898ad66803e9dfd8c023708f7a7ff468. 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/QZSYP2273917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb3dec0ba543f2edef8f3d9f25f2750b530b7f7293815bb6fbf1f671987496. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZQAY2231274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61bcc71cbeb5f881788e64c5420dc23138d84a594004a2a3e9e7cea85d6de94. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTLA2469260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b1388d9d2b918f095f75fa3078ead527539909bb5a4799f33c8adf4aafb43. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTL92599010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a6587ed3ec1f17cd5bb0805d9e14068317acef42eff1b044969044a4f9eab9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZS7J2538966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed3f37f2483b23b655a7eea92eb52e9c2b21d4e831cb6550672680b307ab03a. 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/QZS7J2458101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2b1388d9d2b918f095f75fa3078ead527539909bb5a4799f33c8adf4aafb43. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:12:29Z), 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/QZTL92599010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dc10b0b8b219638aa479011b9789be550d3ed43a0c43d48cf68a77320e9391. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:09:38Z), 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/QZS7J2537242.