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 0x34c98c22f0444f454fd079496a8094cfbe9b35ece5ca531e20448dae33d6b0ed. 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/df7cb7fd-59b5-488b-ba50-78fc2c0a1127.json and https://artists.proofprofile.net/proofs/artist/df7cb7fd-59b5-488b-ba50-78fc2c0a1127.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 0x429906bb737941c371fe0ac2af6bc67d7edcc153a256bc7c367d7b06993cf356. 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/TCAHZ2493472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d540335195f781119ec7790f4f87f7a6b2386882941a5083f11b4fc8152ffe0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIA2444276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d0fe0edb431395794c2c753facb28ba0c75adba557dfbdc5a6ffa1a7ec3c5f. 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/TCAIA2444297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ec44f5a449acd50e2a06b31a7d2871a0aa64f8831dd693183865a09f9dcf44. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:28Z), 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/TCAIA2444303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee95d01147e9f9b8a966c1281cb2aa1652f3919495a582e46fbd921e6d70680. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/TCAIA2437678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0690185e59f4b27424aac6e904e30d2492ea735638303f3713371d99ac90b30a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:15Z), 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/TCAIA2444473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a88e9b1e30be288c272be085d15ce38f7bc714ad0cad0619e3828843dd6f31. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIA2444493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a08c9ba289694cb063c78aee48ceb2d4e5d3486953418e8f9bfbe8ef360946. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIA2444499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d69df3fc33eb61eaa9ed353d767c7269b335b24c98d01b10d56a28cab9ca8d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZSYP2332153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaeb72cd5e116c8f5506de0ebe4a1c1cf11bf9af35ba5239cbb5b13e527b5f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ772437346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11d416cdd491e2cc1baba825d966517425e79fac93e49c81cd4e5a0f6fd67f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFM2381620.