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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e1be59b3e4a184907d7f6ae182ff0cb3369250299828b05ef706ca872e77fb. 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/ce29b783-f0d7-493e-b5a4-b6cb6f5c25f3.json and https://artists.proofprofile.net/proofs/artist/ce29b783-f0d7-493e-b5a4-b6cb6f5c25f3.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4283abb111dba3ad454d1ce0b747473bdb1c925eac59fcf18dfba378a7eaeb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2466024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5ca2981e48d5e869ef739eb72103f351943f9101ceaaac5760c3a38df9e9ab. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA5KR2512848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb254f65317f33eae4a2abf029804ef80e4790067aff16dcc0ac23eb6434c38bb. 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/UKZGC2406318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92d9b89454335c75d6a75455ec4756181762e3173d3f7778eabee9aa68f6c69. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKEX32434230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208fa6725015fcd52b747232bb7da6ca11a6c746f3ddc7a7b04c2737bc2f9f30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6QE2422732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc780b58dc76c5ae7f46627ace8855c5900e94ec0c602a9db8860009b4f37c720. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE6QE2427257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf169eec9b5a4c515294a50a650d96441549f1432cf8ea89f521c388057ccec92. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/SE6QE2430046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be2b270575354ef338fd6e59e42f25d80ec8a482f477ee036dc124282f1bac6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE6SA2444847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c73bcf773e1c1dc79afe1b400efcb1faaeca9f1385aa6e7a65d20b48d8843. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/SE6SA2464722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfe3c563aa53669da0288298cd6711c02bf9e24460bf1acaf96a8b19ad26071. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6SA2464723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ba2efe7bb7e1ad390582afac5832f90725d64921cef149ea74be063922457. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6SA2494675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad42c5f8e500aa0356f86d9522048e30e35b1c8a8feeef66768fe50caeea7e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6SA2497267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a058f442440baf7b273b3135ca61a0dfc6d785982953a25f23abf49fef07506. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2512353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230e70f8026270c652f6224377f1af79d655c5822ac5c8dff001c7e902e2d365. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2512354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be13779680fa78d7a71b817a4e13eac11f52311cbaa7af908fdd6749f438838. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XW2518330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0761077eeeec810eb3fad41e781cb3697be704a9e8e2facbf000cfb81432375. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM7282434317.