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 0x32b8beb13d45d1cd0ee0dc14d67581d639801d4afbe53a3d34fc424d414591fd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d50c3a0d-d71c-4029-a936-b5b25de8ada3.json and https://artists.proofprofile.net/proofs/artist/d50c3a0d-d71c-4029-a936-b5b25de8ada3.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 0x31451c3f74ac9deea847df220878302017e3ac0e057162bdbd5342a47adca9b4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADH1705650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85c8e3c8117fcfd17b562443a6c88c7246f9fbd2ac1fcdf4f0b382aa09c23d. 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/TCADH1705684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad7c1eff6d445c7122c680a5efd06147b475d492e9515ab259026e5f78a29d8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:38Z), 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/TCADH1705721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecea768da7d73474a4b9da355aedec31326203bf805f893cae9cc079b21bb70. 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/TCADR1878377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939b6c452c028e13c9018543a03c396d5aaa6e8a7cfef1add87f67835a2a26a. 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/TCADR1878495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6bf51f81bb4260106c28c8669a7a0f972d1880bebef2a1f1b62579a5e128d0. 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/TCADZ1850785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50f537e8869bf26bab9a894ae597b37b607140989a3e14044b3b63cd49b84bd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:59Z), 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/QZNWQ2012356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410451d1c0b61ae296c99399165bfde6514907233a452ddf25dfc7dd5ac6792f. 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/QZFZ22139969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1301f4db9f5e0d52dd955f5c6dc3334c35acc05b58fb19daacc8f660e5aed4e. 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/QZMEP2191845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe768fdb5a73f209aa517fa26d82e455c5a509958c83c12e91f6096f8da615b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZNWR2155347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415735dad599289e289eb0d5aae5d4b4e91fe038c1bb41abadff82e8ca36c38c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWY2123188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e75ef98c596bc16fd7747c18491b1de994308026c9ddfe735692f3f1d96f1f0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYZ2255053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c03a9cc4fb909643075dfc5856195008db9fb8081e28b086bcf66adf90a616b. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:42:13Z), 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/QZHN62229184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe96ecc2025dfcd500fc493aab79157cb877c5f972973b84d111aca41a0a4d9c. 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/QZK6P2295809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05579180184489061e1a12a14c6fbed37ae9701ffdc3bd32564806cb42105237. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEN2258966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eee3b1105fb6453af17d5c606f74023b05b10237c29a3a31c194a2b1893956. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEN2264771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a261f1e09999d2119840343809adc2ab0a5738aa63ffa63864e80c747b51dd. 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/QZTB32224834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866e32f821af888f665d234bd4effb87c14ea76cdbd4efba76d593ba1aa6f44. 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/QZDA72392343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3e44792fca2eab5a1df9c070e68620fbf5d4da590909b6ee7b89f464e0a247. 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/QZES52306017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c9ce8e17673b595285d0c458e7305d99502287b62534226ef21ee93645166e. 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/QZES52306019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385df5056f6aba701e30733b8370d1227402dbf794583cb7ff1f911920538c42. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:51:24Z), 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/QZES52306020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cf3b7813e566c7e23881b923ded95b0243ff3382cf0e8a22dc954611f175b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES52306022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a325a570b8300476d7ca7b14e01abb722bc0f3884d78b2f6cc6acfd8c3a3006. 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/TCADQ1816500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a388c46f5b196ebc0fce70fdb6e630576a336d6ba62c8776650a75a1500dc88. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2115286.