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 0x55c49cccfb2edc6cb99a24a76b01e81e9eed6d57f46b803b3a922a0751071bb3. 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/d1f1b3a8-f359-4a4a-8a5b-506cec9a4261.json and https://artists.proofprofile.net/proofs/artist/d1f1b3a8-f359-4a4a-8a5b-506cec9a4261.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 0xd2ea59b1b82131e9cd6f774ffa113f5cbda430add33ff2277e2a9ac9ad44db79. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:35Z), 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/QZHN72545638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7d4899f5f4dd039d28eb2fd02cf48c03e9b49ddbccbad752998fe35208dda. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F22521855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeba40bcb1a0c086796ee0f0bf1100855a388ee0b099faa2d1eedeec5d27d62b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT3F22521856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd21171606b18a37c3d6c26f4c8633c59574d1008f81fedfe95078d728d1401. 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/QT3F22521857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3b619d9443fd074f3cd0153fc4484a1a6bad3d6c6c3929c152bf90e4e8357d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:56Z), 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/QT3F32539726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe255e1a0cd4992c9ed5a7349957dbba5036778b4fdf3b3fc74c6396ac15084ce. 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/QT3F32539727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5a7e85c8daf5d31c18e1af1e0e4bc7eecc68d721daab00af6870c716783c8. 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/QT3F32539728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8637268d4999fb342d2cbb052c143cfcbd0a727cf82048727d2454d0480bcca. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F92569762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a52ed1e91f5938861b3043725e91e013278b382eca9c0385f8d6c1918786392. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QT3F92569763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92ad2dee8b355b141a48fed5bb7035fe774e03a3d4b2f03e0c837c14ed0a79b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F92569761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf8627504a75b1dfcb590fe0aa380249f1923473e3051e56d5b4bfd466bee5. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:52:24Z), 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/QT6E92504283.