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 0xfc6f40b0866196aba96069c54a478f729a13161af37a95e5b43fd6ce65d98f0e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f13d175-d07f-4347-969c-f539a8a8559f.json and https://artists.proofprofile.net/proofs/artist/5f13d175-d07f-4347-969c-f539a8a8559f.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 0x81baea3972db62d40332d48fb5ee45e89d94bb885b5fd1e879542df40e791db2. 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/MMA031912232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab02ab5ffc3f59fd124b021cdb9f8c877e87d7fe61604e8805987a5ffa4fae53. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/MMA031912234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11295269d7097e7d047a454912eb16e7c1888b7b1aea1035ece891bf98677a2a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/MMA031912235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c19482a766009e1f25dba3a5dc6d750144e60151455429c79a7201bef2124d. 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/MMA031912237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3674f41c590d2279c263a8ac2646136049b164ba24968c29be93f8529373e59d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/MMA031912239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7f4d54f2ea8fef8f6650f0652d033313e4212460ebff6b0a54a6ac1bc1ab1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLRD52260518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc557d25da2b06746f99b9b63d856c44ea148447eb8515fb2ab2ee3d3aecd3ec5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLRD52260527.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabba0eccfc3721b6a703c5552559e20c93bdc228c535de336c41a9bc316d7184. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLRD52268531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39358eace18ec128fabd5e55d0f65fd85a9e2221815f50832671d4197209f5c5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLRD52352035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0ef910414da0c9204c70d2f74a417950cd90b525d5ed4794f9826e8b5b9ab2. 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/NLRD52407367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143a678e6df40a507a7369179816fd86655ba331a26e74bf34e89079aeb81678. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NLRD52407368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263703ffbf48d51c022e5c5bceaf760f36ab2fb325a5b3a1c28ac02a5f241148. 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/NLRD52407369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d9327b0dcbda6519fdc5b54f6a2637347c770a37860e45c00c3cd5320aa83f. 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/NLRD52407379.
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