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 0x4d35c38e7d1555556e951cc2b271d74e2f69ea20dcac200d2c9e016a7718b2b0. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad9d3ba8-eb2f-4c6e-ada9-81744a62b3ca.json and https://artists.proofprofile.net/proofs/artist/ad9d3ba8-eb2f-4c6e-ada9-81744a62b3ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0232372636c7132b5f06f100ce5e2fe4f3f794c3cc98d29f4db9418388244cec. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3HH2123391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6de363b2eff6091ce1e87d125c07cf8892dc346f5fa2e42badc01a688033cc6. 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/GX3HH2123392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d646881409daa2b11d33c536ee689cdaa9cc97d801200d3e2e7be237e524134. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GX3HH2123393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cf68937b02904d3a93f054a62a8766afa2ec67a10b63588c667d7ebd08de28. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3HH2123394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73fc1ae232337ffb424ad718948ad0db046565cc7fcdf686bdb9482add092da. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:26:43Z), 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/GX3HH2123395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e04a2acafc999d55f643096e5d4b8dbb30a2602541c58695fb6e53f74b9737. 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/GX3HH2114312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152dfa7b4fc6d195014163dfc01c59ef7230db0830ddb9c6cae6409b2ea914b7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GX3HH2123397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8360d984b78fe5c3627b6dc7fb384bf76a6081bcb0c176c89ddca42fc26c98b. 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/GX3HH2123398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cf3946e4357f5b361e23740e93ef44fba1b8160f1c89f9a0d2ee27dba6399d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX3HH2123399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2fb02adfa358bc2f5c4259b3a1d79de760a3035aac8e116ec2e6ea0304354. 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/GX3HH2123400.