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 0x0b2313aaef89467beab97e1427f116f392c2fb3c811fcae7ed0bec71439fd675. 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/1aec1dcd-5730-4626-a3af-864cda97127e.json and https://artists.proofprofile.net/proofs/artist/1aec1dcd-5730-4626-a3af-864cda97127e.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 0x4713f096de7ac57e3b4e6e956613b859b1aaf971250230582f2d0787794e0975. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH7811100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797b78e4aac7a24bef5d25244b768c32ac02ad7fe62667f794e315d6af022ebd. 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/QM6P42014760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bf5704e4956b988fb5544294c3d31f1cf60355fe6becfdfaf13f8d1b2c8ca7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:40Z), 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/QM7282045860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4772e7e7be79b6094a5c16a39f0ad2c77538270f5ebc81fa3c5f0ff2578c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FA2150177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d2f7baaaaa497ba569ebf43d96c791e4e9815b6db848930633f63d37327943. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5FA2150236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e250e61bda1de2a9ab549461d8911740ef15ce0483fec8ba2b342b978ab53ce. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:47Z), 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/QZ5FA2150235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e0ca88783569211adf238466135f3c0a17c8be978695bd0b4bb73bc1def663. 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/QZ5FA2150237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd541a85902fcad118d5ae45ec6eed4d1ed6a21bc487eb4ef53848d91bd2f1201. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZQQE2100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402ae9d95505f921de23c2c45b156e71f848e01c7b9d1537283288f6dc53fc31. 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/QZQQE2100305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75067a49bce4958111bbb4295e51162aeb31af058d506bf2aa7f3687380766d5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:51:30Z), 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/QZQQE2100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8eb53adba11ed4a804c6a4dbb42262001a3b65f50ac9c6c199048b40d988062. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZVEM2388215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7d90e15022967c5fd7579316ea43e63c20be045abd82a94f1804c1774517ad. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:19:00Z), 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/QZPEW2405007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764eae0a68d01b1ec0090e300a443112a779ae963db6218fceb4f8fa0a3ff3b1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:26Z), 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/QZPEW2411646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b21316184abba925cbf191224d44ef3ac2df6788a1e75c74f455a6bc676bc0. 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/TLVEM2404939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5815736c22243d6c822acb7ad91d7ba3a9ff5edb807ad1274fa0e70a76ee11b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPEW2521014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20eada172359753c028000e79b5b98bf1344b3b29df3316178fb2289a4dcd77. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZPEW2519197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e211be98b8c07c2477803a92e64ddd61af7080ad6f74f627c12141009198e5. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZPEW2543000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20eada172359753c028000e79b5b98bf1344b3b29df3316178fb2289a4dcd77. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZPEW2519197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e758462bb8f2189a5fd7b981e64c56a960d24b08c18e59903ee1eaed0f1a2a9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:39:03Z), 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/QZPEW2543001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873705cc434f59c89cac04ca21bdbe122d7aea462005bdd97e0f8282d06f8794. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZVEM1891624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9c439b42f3f8de1599d2197aa3a147f3d90b9bbb1afca16929bde03e10c103. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZPEW2543002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a10146cf07a685c95eceaac6e08a1a0fb3f4f3d9fd6866aa2915e11608ad7. 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/QZPEW2543003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e34bda393a9006f011320125d6cd632ecc2c016d74f01eaad7e8f7f4c6167. 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/QZPEW2543004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687446b9b745b292f110e55de10365468c96a72fbbf6216dda51fef40ca81e4d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM24S2103061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d5e7866752264f81be7d4826936d6e6ab6994a621fece8209b63566da51af8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMBZ92074139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc017f2441449b527848c3ba6a650bb0da6e313155204b7096d237461734927f9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QM6MZ2167913.
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