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 0x64dc6ca38ff4310fc27cf3d6c1b8adc30c7cfe3c593c75e825bad0c74dea7680. 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/f48e950c-49bf-465c-9d7f-acedcf6df891.json and https://artists.proofprofile.net/proofs/artist/f48e950c-49bf-465c-9d7f-acedcf6df891.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 0xe298301936dd85146d69728f5216e6a6635c71e6a9528d26846de233d73b8ff8. 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/FRX452276534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5093fb5503d28ef6494395a0f14f2dbeb96c2df5fed58f2aa88165befc888. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:26Z), 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/FRX202294295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad4d976183d65cddb294c8afd4cdf9bf991abd3d9d9233038c24e158cc13aa1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX452326196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158b28de4e29b8ee0e7db490a72dd9ed45d91fb355b4d2a5c19028040da93253. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:02:03Z), 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/FRX452326197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282df10e07e40b355df24a26230a3fcc4d0693c1e4f46ad244a942a6626c03e5. 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/FR96X2399393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14196b45bd6c406ba45be23919ef0024f41765b1b133ddab8628c7d27fc97335. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX872435090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f6bea19141631f6f25baacb280a085bb28fe28164a58cdea59d4d01b1240f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA062486106.