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 0xf4ad5b4c4025c3931cf08de3d7b8c5f95b94f129a916cf4ff0175621763831b9. 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/2bc088db-6085-49bf-bc8c-933412925c99.json and https://artists.proofprofile.net/proofs/artist/2bc088db-6085-49bf-bc8c-933412925c99.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 0x41ea60e838a38b80198a6b1fe9bfaafb693852372de3284ee5694a711b0a8d59. 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/QZNWU2449982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664dc89a5f7d42148903a40c1ce4305bf0cc0d460727bbbe41ea229ddccc54eb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:52Z), 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/QZNWU2449984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc184051e88aed161c2416ccef3a9fa2023789650701b3847bb8135b0b2c4bc05. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:15:54Z), 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/QZNWU2449986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a2fabf6986f8c42f4c47ec31d46000bb60911d7644cd4d08c8d890405f921. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:55Z), 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/QZNWU2449987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddfd336d70777d7194b821a6f9ee898f0605af22d8976e2b0a0af0e2d946911. 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/QZNWU2449988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b622c6ffe5dbff5ece22a916996095e79fda70a09619d6d7f73db3f1f4088f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:22Z), 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/QZNWU2449990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef42c3013f9b84fba6a009d98357a0926a326cb124f1558acd6aa3e247596557. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZNWW2467854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2512907fb0793b52fe61b7c206dab12247c1242d741f89aafce8ec587d44c82. 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/QZNWY2451838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc95cb03b3a65f37e4ae2a071e8e3415a164c2d1ea6386681d6d84d347763b7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:35:12Z), 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/QZNWY2451840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bdced84e8f039df139574208973f337a5572b6465dc68b0dec53fe1757d51d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:43Z), 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/QZNWY2451841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09241d1c544ebdeb90ce89e57dfab03c0741686ba39987be0a7f98159286004c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:43:41Z), 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/QZNWY2451842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e2aa45e7ee739b6bf750829091475a01e628d5e7c386cda5005faf68309d34. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWY2451844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3139ce46a6b06926a0aac801199e18e0918d53f38c0a092c772bdd1a0302ca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWY2451845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30522b0f834a90d66a9ea171508fd9a812fbc82095d45c28e011330c3c65cb55. 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/QZDA82542541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aae82eb82a355515a8910e0e6c478d144abaa155cd25876d9104ba9f1fc9ee. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA82542547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1349fb843be8798c752934231eb47800429f45470a56c6f1c1898de67208f4. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:25Z), 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/QZDA82542552.