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 0xa54ca5852478900bfb33cdfcd49772597e8dd69e3d9de1f47fcff4d2439c3945. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/126c9031-e692-4581-8890-aa31741da20f.json and https://artists.proofprofile.net/proofs/artist/126c9031-e692-4581-8890-aa31741da20f.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 0x1f356d9743895010e0653b79c5f1ccd0cd1387d80b4931ff1953c390b1011070. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM82539331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3002f66d917197b3929e0007d3bf8e494c7b7bb0a7531f6ddadeffdaca203d1. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USHM82539332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb7a22c33ac0d0385543d9e7dac835294923b3a003cafca8b9d1b1302898b1b. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USHM82539333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eadf5183891a0d2c5a9f278f5d0b5a08101e83a14ecf34504eb8eb54c1356fa. 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/USHM82539334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd26ff050a8286f76653a6eff8281bdfab0b5da97de24912de9602c72290816b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USHM82539335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617a37e711bc4e8a41af13b57be82e2c1ea49f4cca085ff827c55df02640397. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM82539336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82459e3fbf6ead2046e6287f6805156e7731d9b548d0b7b4ad9358f42c46d8bd. 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/USHM82539337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff67b91fd3a66bede5412cf1eb5984160a01a9fd685d14eb140b78b6d086de. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USHM82539338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ecabfa14018f06913a41d09e59e76956a295a759f529a81bf25e98d450913. 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/USHM82539339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e819d74fdb669b3d77e527699e4260e21150e8123f78bd651f489ffb7bf5e0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM82539340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd620d8eb535f2f39d5d6500c8d4f3fdb0d253bfe2fdf394d749ab61ecc9a1d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM82539341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc27cd2460ef2a7b64b06d69e85d570374055812ea3a435f3952348f9ac8513. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USHM82539342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da5932fe83a051721f8e36427471306e657ae8c92993744e5e69b4c85150dfa. 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/USHM82539343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81007410b7d434b27c55a0c63a04c91e512d834754b5355f4e80ff17b7e9680. 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/USHM82539344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab160fc3c043282f7c88df2d1041a314adc897f1a64ebe18a8152af8ecb4e96. 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/USHM82539345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688667e6da99de14a3c2094eb634fbbebfb2a08eb0adae0e0e1c1e10e5d3b728. 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/USHM82539346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7c906005533d5c95387d1c33892c1816e11e2f0fce0e17aa547d1998239234. 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/USHM82539347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eae6c2051ed46ae1af03fe72c118b3ed15f184ce7866944778bb1fe1486d07. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM82539348.