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 0x2905425e767b8b9eccb3a2ec5960fd6bde0ca478ea25a9f8ee08e93d2e404b86. 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/c52ac183-8617-49dc-977f-f4492ce6ba43.json and https://artists.proofprofile.net/proofs/artist/c52ac183-8617-49dc-977f-f4492ce6ba43.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 0x71f679cc483bf988f14db213482cd4d1e8296b77cbea0d7a14dd1afe0e7bd3cc. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZFZ22052357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3513df80d9e11e22ba6d256de45610dc290e72d190d44a9a616e7448562acf5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USYFZ1342005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3de3697149d371651941611ef6166da6ddbe9a5f9a96c37a2ae1c686638c65. 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/USYFZ1342007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8b56afb258201ec78508cd94788af753db366896cfee1e56ff0246238a68a4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMMUK1800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0cb79ec36bfbc80cfa9827279afe2607e273cf1ce29b74c184605417d04024. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMMUK1800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd39ced77908f3d9647454529d9a0147aaaea75df54958acc4abf15cf31591f. 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/QMMUK1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a8e55832f2c6fd147e3043d4ddf0a7c6b3d6e20d5bd92c6e2052dd9b1e4e74. 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/QMMUK1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cc3dab428862eaddc60c4c9b3fc03ac85d80b89dc64ecdd43d8756c33ddca9. 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/QMMUK1800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2b2aff2c64a4772011686e2235be308dfb16c30d902140b69e920d9f77bbfe. 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/QZFYY2030068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc247d5ec8a666246f1f5ef0c80ad184c7208d6575610373a2088ac4933050b3d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN91937906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4050dcf7101bcd6925c2e3fda5b05005ae2fce518a9239eb045c626d82fafbb9. 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/QZHN91937909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f63f8b2f190cfc34a36bc401976ab1909480d4c9f1bc34310eac78faea1365. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZHN91937913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0919b5df032c483a46aa2190563b209aded1bad5d1ad96c86ba8fc8d3957909a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QM6N22098921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f8ed546f1bec5b79b593b40cdd5ef85b3a23a8547fdae5223f0381383d010. 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/QM6N22098933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8ef9e375972737b6cf6d1e9579414b717f9e3af958b15d5c7a211a2d8ca575. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6N22064150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc2445ca56934267988afec1218c53919f5156650ab98e01d2fca18409bd45f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM6N22098927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2958b6e5e6b1470b203f7ddf3e8c986f95cefa14b423f48904962594a7e614fc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:52Z), 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/QMDA72248384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d279c336ef5d0747635a130117cb4de3213f35e1eddb9b1004a0e8926c486d. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:35Z), 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/QM4TW2363468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659ed754f4bbd2216d7f129f8deef9dda07ecf29a2a6469854c3a85589de68eb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYX2217804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d279c336ef5d0747635a130117cb4de3213f35e1eddb9b1004a0e8926c486d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:14Z), 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/QM4TW2363468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf94eacb3e14310b01ac05a470658b8ae3efbe92c009d46ab99b447bdd654074. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM4TW2363567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0589a108011f19b213ff3079dd1be841465c38f31fd0e17499560e457f50d4c. 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/QM4TW2363569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec5354f79c2ee8a6f1e776bd90e2ef5fa877ec175a9351510b5de3405daf744. 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/QZMEN2127192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82daa63826f01d4528608800409b5ac3f0e62e5b578dd797fa93af593253863. 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/QZFYZ2149095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d279c336ef5d0747635a130117cb4de3213f35e1eddb9b1004a0e8926c486d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:28:33Z), 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/QM4TW2363468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9940606d89d0593ac8a6d04a6ca1f0c68a48c540f3faa1cfac89626e690b2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFR2345558.