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 0x186f1443612628feb1d9989cc32a3a9b6bcbe969e3e6f652874554f0391e83d0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b97afdb-6faa-41b1-adc9-9a2385b41b3c.json and https://artists.proofprofile.net/proofs/artist/0b97afdb-6faa-41b1-adc9-9a2385b41b3c.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 0x26a11ed005e891b2d5130c3d6c1905ab2a4348298b0f478e9251df8544026f65. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:50Z), 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/GBSMU0000957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb02d05d297d480ec4aada9b0c7ff5aabf7dfc4c863d3fea1fddda7714e27c1. 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/GX4R52170328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f9d1fc52a1003a1f23236dd999089fbf2f98f92fef59109d48a5c3bd7888d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:06:27Z), 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/GX89G2217609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd16dfeeb9ac5a4a59e057100a7f76807ec795938a61ebf522109f0d9de92242. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:38Z), 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/GX8LE2283665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f6a736d1b09d956027338cceb1095896f01d5435a79e58592a66d6b2f053f0. 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/GX8LD2384987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8475dca18adf32e3dcb60d6f2cf38a443ad4b5732bde7b9eb87fda4e757d0348. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:36:01Z), 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/GX8LD2377883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014aaae440d9ff6fffbb9bb2a5664ca64f9fb8175919bb22a2d8c352d4a3efef. 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/TCAJJ2524829.