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 0x61d9e4adb80ccd2a35e8d7dd9686f395d0bd560f130c022eeaafbf8ef499505e. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61868b51-4bb2-43c5-8a63-72e0cb1b4475.json and https://artists.proofprofile.net/proofs/artist/61868b51-4bb2-43c5-8a63-72e0cb1b4475.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 0xfe2d403f94e671e4391a12c9f6d69eae338330b14d21487a5001c6dbfde8f5c4. 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/GX8KD2556624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecf9d534ebfd4062eb4b004784faebad7587b7dccd943535944f7f9f46029ed. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GX8KD2582493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5363d5b68c762dccf47e9640c433a0e288b3b46cddb38a487c2f003804db68fe. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GX8KD2554664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f1f81ed97fdc84280ad2ca25159e097933654415cecfa9bb1537dea95c7977. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX8KD2570499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7a1002bc56253f0a6b6889945cb908a04c5a7602be753b1e8f501e561b2e5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:56:00Z), 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/GX8KD2556053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb054b755fc183b11cdc543327dee5d1e763152cf85a29f3f4ac8a7f95a5f525. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GX8KD2593924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0bd579e6597b3137af818438a8e508b7804b57679beafacfb59eb4648b941b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:00:23Z), 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/GX8KD2588833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc102d41187c592fd14723dc60e2e07780832327a19a92c72267d4483ba9ae9a6. 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/GX8KD2518938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070771053dc755cbc0181c488a0465c59a9a867e6bc49cf8a882f12ae6fe5b7a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX8KD2506032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2bb2776fa79a24299588c77e78ee329da61c9a0ac945f50ff2c0a5ac117144. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX8KD2501151.