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 0x6efcb7bf3deae8a0d27f02273d486b6adb89150af728a7160fa53c557ae66e4c. 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/a5126818-09c4-452e-9ed1-a4b3dabe927b.json and https://artists.proofprofile.net/proofs/artist/a5126818-09c4-452e-9ed1-a4b3dabe927b.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 0x6051ff0767a0f5ebb1d6211d53062e73695eb5561de6f2703c142a6b84652fdf. 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/QZWFM2437840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aad80b1a4cfddea5cb6f50ac4b0cb8190ca4c2b210edd981917423aa452d5d. 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/QZWFM2437842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230bade382ffa6d80cdae858443f5eb9f91a726de238844497c0c6dcf96fe8b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFM2437850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e6c356ed91166e2d68d6c7c81319642241d06227fbc103887ce1be4573e9e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZWFM2437852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd16aac44e948c078d749cac13357d0b806f847d9933d4cc68347011ea553a81. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFN2428549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cfb3a388b267392ddde6dc4fd36bc41fe5675ed80ecaa3c823083bd826574e. 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/QZWFM2421753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7c2baae0ee5b8aea29260e0aec444a79fe6ad7a71495bc795677774ebff8b5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:24Z), 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/QZWFM2421759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fda64653d0ce4f411c6dabdee84666861b4c2c7a3549f113034a431422df85. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:50Z), 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/QZWFM2421761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e262c3078f86a89ba72e83de4f669da28d1f3c352aa64e62c4f06267fc8719. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7S2492272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8037675010b099ba735cf08e879e225794a960eda6fe6243f52961c384d935e9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZZ7S2492274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6ad90870d2ee1db420e61131ddcba7234accef037005f96a0e45d036d1b2c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ7S2492276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f002de87dd7d07706a64e4021acbc30ef2d09f10dc4a5e02280ec75fc29993c. 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/QZZ7S2492278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d840d63bd8384c18ea24865f42fa95e4440fc61f815d2fd35df3c8ec9968b. 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/QZZ7S2488344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ef259873ed6d97dc85a0384394e54a8662ce679ff7bbd945c19254436fe491. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZZ7S2488345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf304f6c8b9419d95a4c8ecd861f64573defc66f1a2c8a3bfcba5b9f4107f1c2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ7S2488346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee3ed3c1d00555e72a5cc0e4d740277960fa9c1ee91d5a98cd5d9438c649d99. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZZ7S2453913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad40961f4902de0e12977fec0e328b089c4f631aff5e7aafc8f5929d8e131a. 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/QZZ7S2453919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7f8f7fe6bf38d42a00050be0aeb3d01012e521f1c3f1ac79e9bc50e226091d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7S2453924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b622bb5e43dbc971ea7c75ba68fa6aef1884dec222892652936531ccc53f34f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:17:09Z), 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/QZZ7S2453925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b0f759cad47b1f2d4105703429dd0750e981f055148400dafbf462273f020. 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/QZMEN2521722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf898ffa99e694a7f0b42ec0fdc1b09b890ffb5baaa94b91514b4b0547646c613. 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/QZMEN2521723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7bb5c1e12d8edfc1790f1e2f82137c7682c99cc3cd066fa9d1f2404d042267. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEN2521724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b882eafb61a4fa6022c68053e21cc3c446c7944642575784ae07a4d104a468. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:39:10Z), 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/QT3F92518280.