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 0xd84ba1aeb5ddd77b89962ddaa7927aade7ec9f9eb35f1a97019d844a973c50d0. 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/4d5a60b6-0a44-4d50-8d84-c51f2bad1336.json and https://artists.proofprofile.net/proofs/artist/4d5a60b6-0a44-4d50-8d84-c51f2bad1336.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 0x0f7fbe3e4f02f930d81c476774ab208a26805369913186d7e40a5c808d10611c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZRP52335088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71cb08ef6ae8305197c03b1dd5536ccb073b23cf71057c1976032741ce7096. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZRP52385343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0a30f92c12ee07c4d3ed3723441daf8f76614da872513d1c8d05010380f884. 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/QZTB32383114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279d5432dfa92cf95adde04ce131c72dcad5e8b8d39b03859566edb09b0c6fe. 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/QZMEM2431291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6580863a8cc9b48bcea8d355573f32022c7a7ef0cdef77f6e41bc04f33d38780. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:25Z), 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/QT3EY2403763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac38ed50955d09b52e56371b6c3cd01309e7ffee1f7d654d287bcf276689967. 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/QZFYX2516596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e88bb63adc6206375908c26aa17147f4210668d1a9a58426b77ba8c09f31d3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZFYX2516597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825ef9caa163e70a4c08fda9c5bd6e243cba7513088a49cb6c7b35ed57c1172f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:35:08Z), 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/QZFYX2519967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b231f77380193cc72c5c9b9e0d645cef59c07a4a4a01089a45ccc70fa0a1ba5. 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/QZFYX2519970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf772fc791a6fb24c953b9e20ab06167c07b50323922916fe992c47924e78219. 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/QZHN72526571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9db31252cd274bdf3867f99ec2cb59003ed3f5f5f7b2a5d6771199a9c0a6d. 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/QZHNC2541076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f2768434d021a8b43c4d1b5b9c5f4ddb5a961c6913f2441dda66e1969e2151. 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/QZK6P2561895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e170bc7291e229f86d83020f012a98ff9d2298bf00fab5f42acb943f3f8647. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZK6P2561896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc78f04babd20cef8bd4cc1a38c1868df0a5d2fb72abd54e82049369faef91ee. 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/QZK6P2561897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20409670b897216c08fb88b0a3b303223870dd7b1b13b38be6c90ef1b6ea7a35. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6P2561898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920123edb39065a905c5bbd909bfae82d3fd747e0be8517b343ff2315a39671b. 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/QZK6P2561899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aabe74fe871340895e86651faa086121201cf6a934f01084cd532b8cceae3d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZK6P2561900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94641555aa915e70b77841e1db3a948f8a6c9ed33c295015b7fbbfc49824431d. 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/QZNWV2504751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd74d7981232fb9ff17ded0f237159886f241b6ef9f7654430f866c001cb0401. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:31Z), 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/QZTBF2538125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c38c75a354a034726ae58cd0ef28c175698c49e21f7a1fc840d6583ec95eaa. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:32:42Z), 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/QZWFL2533912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145eeb1f65baf1fa7c4150093cb1cf9bcf35bce99866d115f232d63b0f43bc2. 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/QZWFL2533913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaafede724e86ad5fad537b247d66e24f10a32f3be4903a93a1fa2715325d0c6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFL2533914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9666e9b65d78b9c87ac293f624e495794860c0e7f1797c8f948f01579e49aa87. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFL2533916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b58702371f8e4503424c352eba7fde8301c88738a8b31b6b1c63018d97a8c. 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/QZWFL2533917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9403cc423f52fdee18c9196a87a2b6f60aa6648a568e6869b6de043f286ced5e. 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/QZWFN2585802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4087cd5b584aaf7c63c4ab4082dd0ec9174f906c038a859eeb9a25ae1dd2a9. 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/QZWFT2529650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcd3770d5c5055da46a13c612429ab461d1b28674b9eba7cf04fc860d56372. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZWFT2529653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6394504e67ba03337ec015dffacad868336e9a7eb06f33c225c72a620b6072e. 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/QT3F62559390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b408909a12e4bfe8e9560bf0fffc99091acd691d7925be1e823071a06a5a4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:46Z), 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/QT6ED2596205.