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 0x718e45f79df52c29a6f98de53ca011c5c06ac9137ff0a4960981077af0c9418a. 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/09a360a2-7c41-4bbf-95f5-2be09863fd3b.json and https://artists.proofprofile.net/proofs/artist/09a360a2-7c41-4bbf-95f5-2be09863fd3b.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 0x5c24b39396160b75e5d29670b399627308587b85e8daa4bcb7c526824c5ea27b. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/GX3HH2176741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb294e008815281386185aea2acc814b849f8a064894c44a0a936b76ab0418621. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX5MY2184785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8565bc047ccdde0a35f9d5e72c7da0b631dfe2fd3428c8a9f23cedb3d140c5c5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GX3HH2213499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc35de9d5a1fc6fe09716e43f70c3c50dd3df650f8ae2fdb6bd7b2071a26e03a. 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/GX89G2254013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47b6602b2a672a20e9615d5abe95dafd065055b4b52d78fe59314a445ebfcc. 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/GX8LE2332446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb13620b41b85d8134ef925fdaecde3e465b5a3eadc3ba069e494a1b87fd3511. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GX8LE2396379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b50f682b63892568449908115e21e60b1401b411b2eaec001748a0638d973c5. 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/GX89G2453151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb61ad72206fceb9eb2b475f3d3dc524dece7dbae5894d5795dab47a0563901d. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:26Z), 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/GX8LE2494190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c65f582d87f0584a19eff013b7ff2fab4e3c291dc64380869cfe9761fbb464d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GX8LE2479800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619aadc47d13b0ec387419b05debe4e4b0390fff5a923ab52647e21420d0f78f. 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/GX8LE2431867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bcf055335da0b39a28417985c8ddc7560a28e8f727797ef72f44f04ea5876b. 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/GX8KD2506669.