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 0xa1cf52a6ad2672ccfd84b96f1cba9b203ea57cdf3a2114d45f200385a13858b8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40107e0e-d9e1-4f93-bf61-caf37e00ed76.json and https://artists.proofprofile.net/proofs/artist/40107e0e-d9e1-4f93-bf61-caf37e00ed76.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 0xb21659ff2010e8e4e11efeaf56f10fc1f0748edc8734045b304323669b18d284. 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/QZTB22501634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff5791ba8331ce78c80bf0c5f504f9fdc199dcd2093c40f2707426f83fac1b7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB22501635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1661df88794a1a82099cd924827ed94d60351125d091fbf55a7139d7fb549da. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB22501636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726ff85072dc0da448a74aed24b4601253a293284f699953b5755dc46c608254. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB22501637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d423b712471ca054bf8c7c169c9c3cf3a9674601e62e39d7849e1378e37a553. 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/QZTB22501638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde40a972a9c2259db829379a0c3d171c0d556bbfc28ce5ecc7e793bdc3c785a. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTB22501639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3979da8d0b295facdd15f45bba271afdd8754d2b56573efb4e9473926569086. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZTB22501640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423bca1a7297aff6e7aa448c4455fc7d345b8a9e724d19948a4eda05a8d1d5a1. 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/QZTB22501641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da49a14de6da51488c6dd74a78a6820ebf73d369ba93edff53120c288b23347. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:33:10Z), 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/QZTB22501642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa7361e7fa84ac2e076cfbc76b0774b5f984a8ef6343486fe456e1ab44f80e5. 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/QZTB22501643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aadeee57de9cbccef999d8b5e085d1a4c4fa5bf24058286bf5dbebe50da7cbc. 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/QZTB22501644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c51b42138b14d25cc25a20f33f8362b4614e52562f920819037ece24afea15. 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/QZTB22501645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7937ed5b844ee1b8954ebef715ce7035d89df8e2ef9d7600110bd7ce0b537a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:14Z), 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/QZES52505874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc722d68002dd7f6bbb82424792a46d67a7edb7d6f22496d799572c3f6cbc2518. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:57:31Z), 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/QZES52505876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaf9a4b000609270795d0491504ca9a60947acd6744d30e218a4c6b50e361cc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZES52505878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b48a008e5e19be8c7ecebd44e20cc009353702659be973f64c6e4c3ad8e87e. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZES52505880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8243b5e29e7ea7187010ee53d158bec02b4c94536a21b5cd56ed127796502150. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZES52505882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8ceea6ba1487232309ab0c3fc838100f85d04e04752236e3ce47f7348d3fb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:31Z), 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/QZES52505884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d0b8e7d49f98d9a4cac9732aa610fe6c798a52201b3546b9e54f4c9720f2f5. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZES52505886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d2592d63e35d3220af28418f44d7cf2613d62f7bab1987be9a4cb2bd716a32. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES52505888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2112561c7f05190f13542005b1cd5460654fc5d9bbe2800f0f26bd67cf2255a. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZES52505890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a797b0ce918900b7f6640e94236812ec5d2744babefdc30836290ac425d749. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:52Z), 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/QZES52505892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9fae879240b282c4d999540eba36912595151c55e7ac4cfb7c4467bed74cb2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:47Z), 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/QZES52505894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88268456927bcecc6322ceb96df4c2ebf74abd973e9ddff91079f783f2902573. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:08:52Z), 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/QZES52505896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d1297bef937e698deeeea0867249727461beaf99a323011add508a113ce5d7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:17Z), 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/QZES52505898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693a91e2bdc41e6cb5eb32526d80ac713c8552c376d02443151590046b8de3d9. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES52505899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6943d16e06e64f7ae7741268a4d8949c54f81915eeb5e17007a6ea97b74a5f73. 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/QZES52505900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb50f4e39e731501fabb0d2635fd05ed347afdfa810f45b02a4408861efeef. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZES52505901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb8d35af777a953da6996d91a5d9d6357ae1fde2567412a30c5676351c88fde. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZES52505902.