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 0x9eeec6432fe6d940b37e905aea087e06005f63462e6b70415044dad1f0a5481e. 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/f7d66b93-7702-4bfd-a169-f4453974c750.json and https://artists.proofprofile.net/proofs/artist/f7d66b93-7702-4bfd-a169-f4453974c750.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 0x77bd9f8910c6756d93c8afd7a682649d58ac185bed4b1bc9ae7ef3a33650cc90. 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/FR9W12411720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914c4d055ef800e19ecd581234c2727f9dc0533df48d8a653b2065bc18512be6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12411721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756bcdf11edf10575ff260bfb3a25fef0ac74795ae021fa07ac1182cc505a816. 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/FR9W12411722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1fd069d8f4119bcf25ffe7dbd971f5accd794fb29727be221a253647ed69b6. 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/FR9W12411723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd64cb05a5ae6354594ab767575a8cf2e5d417e22112521f6131bc59f6f0b9. 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/FR9W12411724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b286ab16bd0e0b76279040697008dbd78b57f2dbd29eb2017ce018abfc2ca0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR9W12411725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b02530a1bfb068d4b6cad813929fbc9f6926021c8cf6032b25105cbb49f109. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR9W12411726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b58a74fe352ed4ec0dfcaec9cb5a63992d684bbc63ba6285501793ffaa056b. 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/FR9W11822571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00db77ec0e4ebe5455f603cc1c80f8d2399c34c3cbb45e7d8b8e4e720ee343d. 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/FR9W11822573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d8c4521e68d3c2067b72a8e9a65065bccdacaa1d54873bcd140a943b513eee. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR9W11822574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f4433d955318b73d9e4bc9fa0d55b542fcc3243f62d5e4b2ccb4338eadfef7. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR9W11822575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d97d6162ef7f0ce1f696478bac81ace6d307ec306496d99175a3259f5aa75d6. 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/FR9W11822576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e824e4de1d90b2b28096e8cf411eaddd90c9d23c91b4314ebfa45adf18ed41. 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/FR9W11822577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568e1ddf6e1b638b9e2ad3c24814a37da5b93b8021f5c17b71e6a7f6d660f08. 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/FR9W11620469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914c4d055ef800e19ecd581234c2727f9dc0533df48d8a653b2065bc18512be6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12411721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f726cffdc383f345e613c19eb08fe6598884a3e1d944aaad4b18d002622a02. 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/FR9W12360545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81762f2f1d36798911a9899adc3a121b8e9e5922617f21267348dbd5b2fbf6a5. 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/FR9W12335449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3839bd577f8457f8005e2e93ba263ea5b8872e34e62445d8595355d09fe3b879. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR9W12228915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d06eb5477db61464e7e162583d2cbdf0ed8c43daab1aed9cc339a5ed4db91f1. 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/FR9W12127036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3781bd27dcd16ea13acfbdee4e69c1d7dd9bd06379a2729886f05127c9ac7c. 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/FR9W12127038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3854bcd97c762c32fe0d9975d605bfc9aa6cfff40b81dbdeab13197a2abea50e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12123217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f437b1c5bce08731111e26453f0e93c45944a3c2bf8254e685b24352f0ff194. 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/FR9W12014776.