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 0x7b5bc5f5bee7a223bda2823277c134ab7efa756eb3651cb3493b09603385fe47. 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/ce9b632e-7923-463a-bdfe-ca69ce84546f.json and https://artists.proofprofile.net/proofs/artist/ce9b632e-7923-463a-bdfe-ca69ce84546f.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 0x5bc194b575d6122177c7a99e2d39a1264770d64c079ca419c45b5ef6b3100b8c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/LBA0H1700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc62f1b65787e794552cee2311a9d18ed0f265531928d732943d62c5e20e781. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/LBA0H1901319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5347bbaf030aba5ade3655ed0d38633bb81cb5476c1d940a545bbfe95d0891. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/LBA0H1901347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d7708cea96151fb42097bcc08c4b95c30e292ca56c58697e00ad162e39db2. 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/LBA0H1901346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70ec5f927ed5cc4d5fac489b4877f61e59aeccf72ececb85699bb2b354e807e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/LBA0H1901337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4ae0ede337ac2985e9a4dea753cb1a243718b3bab6dbfef5deb291c6fd3a8. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/LBA0H1901345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b76dff8e1f85fdfa09c7aa54efc05c3c280100cf3afce78e2e02937bcc96fd0. 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/LBA0H1901344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834cb64a920c3b33aec27ee3b210adb74764b8019f3dc2d63d444064ae7c1a8f. 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/LBA0H1901343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e3eda8fda6e277bda354fdaa312a2095f0b48b0533a181442e7ba67ceadc67. 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/LBA0H1901947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696a4e58156f136de3667fed33ee0b19dce91fac6ad23339ead39bafd4780fea. 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/LBA0H2001622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2f9799962c6bfa5317408a9553edbe63761016c6ae26b998f7aa9bb55a878a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ32335339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb79d621848c3c909f6d96095b2a7c6b21ee21a4701ac94f61e67992838fc43d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZFZ32356882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e83d6c0ef451d7318597e9abd54d114c98adef91b17bb1473ba3eda362cf701. 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/QZFZ32356883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03ba044fe5d3dfc0cf8ec44e4ac69c93533a0e50d22e7e19471ac12e8d8ad26. 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/QZFZ32356886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6e060b0d04ac197734681d3af1870f91908bf81e1f20e4fc76fd62b0550508. 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/QZFZ32356887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4933980532c5b951d5ef4edc4d683422bbf945da4ac9bee18df7bd3fd33cb2d5. 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/QZFZ32356888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a3df3fab3a1d7965a40c9b2d20c49d3ac70e60a349363b4cb7d9bbd42dda0. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ32356890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9394b70e17305fd7b771ea4257e911945e8ce9555a4d16fd8dead7de36561. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42361824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff8b3e5df3585224a81091e2e3a30b63f74c796b743b732bfef58e291bb471. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/LBA0H2004087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da7b6fc128c7322c22f03f677967f03f9569b91c9a7ee47da625fa33ae8c7d3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEY472482993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cf515a332f3274c207d6ebb0403ae87f1f494acbf32b59a54b09ae530d530f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEY472482994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91f0840a94922390e5ec848b450bf95c2657c1bc8aab56dad3f345c667b468. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2230502.