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 0xc23064b3336722486866520b4693d7626acf3ab63c6fa8c86459e9fcc661b9b7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce09c531-0c96-4db5-b48d-e8ac4af36107.json and https://artists.proofprofile.net/proofs/artist/ce09c531-0c96-4db5-b48d-e8ac4af36107.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 0x634774d5a00650995aeb88a36b774a1f0e05951e7d934600b21dbfdc41155983. 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/QZPLS2323764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca34b1cec16141fd0a95b486f1dea765ae753215465190c1f3be04e1faa9684. 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/QZTAW2344414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455f200f0cdccd3917aa7021d064d7a28d500bcd26cacc54240a9ab7060bc1cb. 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/QZES52454510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174488b8138fa8bdca1ecde339e4c951d1523747deceb9c81d690748bb965633. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUMEV2475924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfcd6ce5b17484f1c33d2b512215b62f074b9f12444f17d95d37a912065ccd1. 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/QZZ7R2442233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b33c24ec0b312499ec76784c2deee0d810cacf37ada682149c646d0216bed4a. 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/QT3F32419532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f268f62c55556a98d55fe1ab2e33e4c889b2e40a96861b6c5989bb408f904f6. 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/QZFZ72598522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59d659bd07e9529a9d94efd4cf3d1476ff64330605a55000a404eaf34596385. 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/QZHNC2521704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fab6c2292b464ec717da33d624b12bc5be1d4734344e8e16762ad5a9c7ad893. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:09Z), 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/QZMEQ2591446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a56b00ad7d26748d7c57b73166f7a3eb371dc71ce14f18e254ba9a0c6fe18. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:09:01Z), 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/QZNWW2556816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c7cbf7e278041019ac7000838c6e5bbc917a4675122d4e8bd24e46cda388c0. 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/QZTAU2538965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbe7c2d75a46dd9fbcc9b802729867cf2c37fd2bf68b77131414eafd7cff433. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:19:27Z), 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/QZTBC2565836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac906dc9d8d2022723930eb1c1c8bb632e2304ad51bb1475faa902d39840ea2. 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/QZWFE2571539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5c9f81b4000ca4d3fa3a7f9b8c1fdcccb4fb843045e0607549318da263d11f. 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/QZWFM2523117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e3512f19c9fc8961d25ff8807293a00c2f103ca8bb2541b3fed145fbe0d01. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3EX2587881.