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 0xa1d7aa03280b658d5a6c27fb0df5e23775d93e0c79abe7ef8026a00ce2156864. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e3ddf4-b5d2-4e00-81ce-93598352cdb1.json and https://artists.proofprofile.net/proofs/artist/e7e3ddf4-b5d2-4e00-81ce-93598352cdb1.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 0x8bd8122c9eed4f50ceb4622e82eda88ea4b15a0840fae54c4baa337ce8110306. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/AEA2L2372330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24aa903f819779de536d15483dc45734017e6e95beff553d1305681fd8ff197. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AEA2L2396986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236cd2f42d8523bae37fc0ba852f3d80a410b0a6eab1c4f0d6213a88c46c611d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AEA0Q2336232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f3b8e80b86c33341403b581a90948769eb24b0b5da50df48122e493761a2d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:57Z), 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/AEA0D2323477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b9aac655c06db03703c7d6bf676f2e5a5e8be69b117bdedbd81e8557e939b5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUA1H2447501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc341a1c9ca8a78038e58adb6b08ca906f7d387ec4e35835581d30e9c91d938ab. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AEA2W2441588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3176024af9fcc0ac91b44ce1a0cbc4857898882218b652fd0244040cdc5439a1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/AEA2M2452410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3699845f0a33fabfe470bf2ec775aba8d0ae875f03864f49d4cbc9d9af5ba02e. 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/AEA2M2452414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf060241cf63cc289b31953b8d66f66ec82965b62f1ace48bad4325b4a64af3c. 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/AEA0Q2485885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90b99463df2bf1de5a281360660670d2b2850fdde7b623beb2754477540964. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:07:47Z), 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/CYA1X2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8463e4ccb4a522c241cee857473ac7d9ba1d9944d1f3f8792869f38c9eed84f1. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/CYA1X2500064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feadff06945076b43580c7a532d86b13cdbdc4057d2cd0e17d2a929331aef79. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CYA1X2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe5a9b109e94758aa20e2709951b2be1a99e64d2b9af2e2d48ab9787630e4f0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CYA1X2500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c31e3070466705783098f700f64327d7246a78790f129c4e3aeec03cef50bf. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/AEA2W2581930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18193c124e83c3896a75c6f21b1ef930f2a450c4e8675e4ee30a750433332b9d. 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/FRX872584387.