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 0x31209f205471ad274807c1f7d8e7f798463c8fd349d383d710ec495d8c0ec963. 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/92e442b8-20aa-41cc-9962-32b83bf5f1ba.json and https://artists.proofprofile.net/proofs/artist/92e442b8-20aa-41cc-9962-32b83bf5f1ba.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 0x616f0e99a60203ebed5900ef0d1b6c0bf1efa5f54adb3a066bd8f45dddd9ff15. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBCMQ2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45431f845fd825607f216821f7f493a3913aa6b4e7550c780d41058f4733414. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:54Z), 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/GBCMQ2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cd53ae81b962289eafc0be5db5dad67dd2f899e58a42dfd4b37ee10eb8c317. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:10:48Z), 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/GBCMQ2000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099b626d92a72769d4576273ede21206b18afd4b1e7c4e81ae548dd5c23943d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:36Z), 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/GB8KE2150525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd799cc9c31efecd567f24405a774dfab39bda37a2cc033bc28663674630522f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB8KE2150529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897243502c4803483d5ed12995930f5cb5a2261079b43ad0dbc24c6e072bc4ea. 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/GB8KE2150533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1f9c2249e0e1223bc1697981fb02d9f0b2c9674618cdfbd916a0e0e5ea430f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GB8KE2150536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44acaa8606304191df4f90a3df3434e6adac97dedf1c1151f259b8b98a017841. 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/GB8KE2203910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3f67e91ce2bde5b6728f120846af08eb81779e58a57b1d09c8cac305211c81. 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/GB8KE2203915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982d3cbdf5b8d57e4dffd29604507792879589a4b5a0f9b809331aa76b423e78. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GB8KE2203917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431361447b63cda0f1318a609dc6dc1ba73baa2a5ed3661c72dbf3aa68af9342. 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/GB8KE2203918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9be8ec58cca29e14d63432e6334d98af8ba02a4283822eb72535d7524005ed. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:52:39Z), 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/GB8KE2203920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3303f8a6fd5e8e40b73c730e844176183dbe2d14eaaa35745d866166193fc352. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:23Z), 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/GBKQU2443639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e41e31231030a6cdc60ba5290596d929fd1c90fb0e76d57bb7fb53a91dbee96. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:25:27Z), 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/GBKQU2490831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d911b86f0ae8eab3d29b3e27be2c4e094e2caf4277bfa65cede46211739a5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKQU2504621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be722825fd3e7b5914ed3758819a0d4d180f9f0ef75e6ca24d3ecdcd259bfa9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU2488705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895e3f2d57dc08431b883df3db00cf76875121a5bf2bb8054e888ab62297fb85. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKQU2511737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428ce6b73027894d3b9e210d68c5a6cd2c4a81045436cfa16976972cca1f79ea. 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/GBLV62406419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29731b7f6c45a6c87506854cf03f3d3b2138b88763f597baa010fd4da91fec24. 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/GBKQU2438044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f99a6f512cb56d5cf010a43a10e4f4513127b546e394c56937cad3397939a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GBKQU2537495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc61a26118bd1f64922c30b2239f178423a553dc7b06a19ab745a6c445be4a1. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/GBKQU2544768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952e623d47a4330543b53f07ea707907944c63ba1676256ed0b65051f468f124. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBKQU2548293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b8581ebb53f1f67df1ea582c584369bbb51ec80cc07709695bd2371a3a5269. 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/GBKQU2548294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1ac063888a7e3f82ebfd52e915c014d91b118f03b55a77595a2504c0c4b50d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBKQU2553833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3ed6bbe1f84ea8eba9dbe61dd756eb0d5a35a5a00cdea4b775f5ae45b6799e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2555945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec72a8fc7f9cec16c9b5a40c230f7e02cb8fc0b21bb00b407fa6b1268f5aa277. 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/GBKQU2555946.