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 0x261d9d33b27c030f09672e6b4da7513120b0a87d4f78fe3a820f57cd8764ba04. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da86a915-03d5-4dbc-ab39-a943dd8c3bd1.json and https://artists.proofprofile.net/proofs/artist/da86a915-03d5-4dbc-ab39-a943dd8c3bd1.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 0x2ac3d3952bc0f93f63abf26392264b64acab502b125ce92ebd20b5fae671962e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6M2595472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1215c92e7684e5cc7ab25de19abb3c091262b638c4943919b297ce0c557a716. 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/QZRP42542593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a338887a24a9c91c97347bcf66c3fba7a81839c8a56de37f9c9c90740719486. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTAY2502032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c6f333febc504c79ddb980ea2a34ef8462ac958c2b7572a08b7fc6b649654. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB82540473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80aaad2454e9ede64016fc5e2ad1224271cb59d4b98994e7209e58d915c1b3c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:26Z), 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/QZTB82588510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9070b45087c4808c8f81f40bb039d0d1254010c82166cc3e37aed20527040bea. 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/QZWFJ2544790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7ee80446d65aef4293e9db3c682997f4b869a4034f95fe9f07d46a07965afd. 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/QZWFM2570710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbeb35e01f591f938875fc2e5cd120d2d834532a440cf47e3f8b5f1c11f88d0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFR2511977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f2f57d58b501a027a4d66fbce30d4ae885c3c7dc2f1a501333edaef02af909. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:39:19Z), 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/QZWFS2558138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a98e3ace44e3788d6d5c58f658a55608be1e1204730515e4c25bd55002db90. 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/QZZ7W2590583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec75a23a5adf468266b916b27a6edd72f9913d8374154a15e39f750b611f0e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:33Z), 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/QT3EX2538878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4579e8ca47ca55e69f432f3485b55950407fceb4a8ee1c2e38eaa5c63a60810f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:48:19Z), 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/QT3EZ2557056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812b639547434e5a6fa6fad97d7fd31c7773f1f71a6fbe1227208f8d2eb430d9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F72590257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ed52989dd00a21e830cfa1b6f2f5be7ca6907cf936282f5f4aba57e734bd0. 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/QT3FA2571632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f750b45632c1044545f19c2f6ac81ac3380f7b852d9aaa801eb55a00f0f1b1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:18:51Z), 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/QT3FH2556526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a3c1c040f1dc177b663830bcab0427c3ca7a5f76d28df76b3779509dd3d28e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:42:00Z), 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/QT6E72577140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb356bd6db01da5fa691e95ad13c4265e171356b585fc78b2956378254f22d115. 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/QT6EB2580979.