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 0xac048c121ae46bdaaaa2a53037c75bf5a80b2648c02bda894020b415c2fcabef. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e642ece-324e-4119-bab7-a9f1251d8caa.json and https://artists.proofprofile.net/proofs/artist/5e642ece-324e-4119-bab7-a9f1251d8caa.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 0x85232ed39eb2744462a5394b21f2e4141f23098d90cedd3b85cf00b80eeea5e9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU1743178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32efb5601b1004be2362280ffef97cb9c38703cadcce585b72edfdd3a63fee0e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEC262433101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1859eee6f56e09ee7582edc225e2a66a1d36b385839008f18fc128df2c8416c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BEC262395701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc66fc5154848767d10dfda43f09821e86097d67638e85284d416eed6e98da40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEC262433103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee064fdff2a0fa272ee4d1dab0aa79198834ec55701650159acd0a937e94509e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BEC262433104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cc45eb2ef113ccdd623aa606ec6494a4bc3c62bd4d91d7a4b269be5d93ecbc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BEC262433105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005d8306a0e0d9de538994f359501d5b382a9f63a5dc7d60a495ad6952283fc9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BEC262433106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9614c0ba17d9d341cd0156ed3871ae0eed25e8a71069dfa9b29e584d29d16. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/BEC262433107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c7fb7bd34f87b1ec19ef46b05710829f967db7c1080c12d2670a7d710d1930. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEC262433108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb650a4498fb7f4149847dcac02f3fc204a0974f8f2b54ad491d9fd1af20219ae. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BEC262433110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e1d1e51e569d4909ef3d60eec008481f200bbddb0f9ed9370cf21cabf14d61. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BEC262433111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76e3e0606f1829c5c6de39c53a42c86fbab91b052f87ff3ec2fe1c3b435d851. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEC262433112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb285cec5df83563eeb73b2f50cca69d10947ef14e2600d025c8658cf2424b7a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAPG1776261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71dd700505ed3553c926ab9367f450a5ce06a4d37008a12aba0184ea986670b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWFR2361449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a07097ccca20e0a1b39c91ef192139b18e2866e028d520970736f0175e0eb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM2PV1680809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e5b6c2bb1892ad780373156bb27204c5c866df70b50fabe4d6206d4eebc6fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM2PV1680812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64c28ee7c18a8030b58eb3a8f4438ba73143f0809947edbfc2189030e652cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAAD21010162.