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 0xbac434dcbe925b4ee0f9bdaf42f0a209143aa008b73540d1c2d32ca8159699bd. 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/401c0e17-2131-4775-9cd0-9598bd09eb6a.json and https://artists.proofprofile.net/proofs/artist/401c0e17-2131-4775-9cd0-9598bd09eb6a.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 0x9c3dd3a4633d756622a5b7a5909252d255e1ac0926ed442a76a31e02a6b4da5c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZHN72209758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fba2fe0ddce2e90fc6f0aa03825da7676559f428ff4c347da40cff5aad73a98. 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/QZHN72209759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4bc03f6c7fd283d8dd74458caac61d4afcbbfcc53f075840b4efc178d219ae. 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/QZHN72209760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a009583a86007436472477da3bc58bd2b644a166ba8239a5e9696326c149ab. 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/QZHN72209761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9edd9866a554d92bcdc550ebb864f4ed1f5e12b028d8f7111e44ade2d8a432. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN72209763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6cb2545a989e0af4d27870f75ab04cea6363eac375d3871d50975dbfd2be9c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZRP52229888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4478d26f02bd344574751d739db93e442491b63ef43ba3767fa07b2b7849aec. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42252140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b3d4351149dc005781b908ae8161243c155d49da97f0f8f419b3c167e94d9f. 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/QZNWT2336203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585b929dde68a308d890ecb6f4575e38024e1c7d09c5ea95b9728aa4b2785c12. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZTAT2345346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6814b210d767c23030a526bc15e2bb09dae9c87436e27d8330386f9b3b4ab94. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFJ2351053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3a28e6f00152a428f9ef1c6a205343ea9ae18fbee875ca570ea1320e412999. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHX2418169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c501d0ddb307de23fda55ad0e9a5b833056cd152990941af984213074451b5e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHX2418293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2df602b88a00ca03754ab8cf005024a4503f0e9e3ad4a4ca71e50db4cbe1476. 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/TCAHX2418483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754a474573652523babcdec9b33a114a686f0ff8abfda584d52f64d79886a923. 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/TCAHX2418539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd7e8d301c389a5790cba8a87eebf77779387456d552a6dc6577d042028460e. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/TCAHX2418701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acd0a7683c2bbbd05500a0c1138364fe5ddd41dbdd8b271396fd02cadb7c4d2. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAHX2418790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b0714409f80226e374a68334a9447abdbd97f326370fb71e1b4a93b73ec0e2. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/TCAHX2418904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fefddccb64a038613723f95412a7d3131c44e9a719963b97bc0174e5462863b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/TCAIH2441719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fdbbe06babe8cff883e70b56cb7e1e27bc8800fde8f388e2193ae26962a617. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAIO2400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9313cdd4180a40d62183b19c11febe0c08f2de264f341b093ab61cc9edf5239f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAIY2417339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe711dc1d0c63f8ec7f10ec0f8f1519f2e3b0bf557573ef7d86d7416e5927f7ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJI2519411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4748fb2e2223ed1b197af66f938428b3f821b2a8102ebf6cdb9a31954c71de86. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT65Z2531369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a09fd181a449f460e0b66238074317967bb3e948662b8030cbd9b72e649853. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTAU2122971.