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 0xaa1f0329bab75b7b08d13bb8e44ef80246ff0092c2b1a99a26d86da587d151ec. 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/696c8b49-351f-483f-a4a6-02974c6b16d8.json and https://artists.proofprofile.net/proofs/artist/696c8b49-351f-483f-a4a6-02974c6b16d8.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 0xc361af4464f4e7aecfb3c549332b0c25824c7ae26660037210e87e14bafe1c92. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:48:39Z), 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/TR0511102648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dd56084d8932a121888d75e3e6a0a0da49723e30aba00e4f8df703026cdd31. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:22:09Z), 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/TR0511102640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2e4c739b229e1cf565cf0ff8a2569f1f63d041bba95245c0a1d7911eb4e207. 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/TR0511102646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f63c91b2c15cefdb07fe3d429566152cc58e59d6af3ee66b2f6360342db788c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:31Z), 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/TR0511102649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063f530dcffe78574687cc57304d9ac9d65058e23350e66033d4d8e8a570c721. 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/TR0511102638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470a04f615b700540662693390f1facc4d049fc8044f34c6ad9fbe13a8712f1c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:28Z), 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/SE6I32058329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a20f596d3d29387b340d3cb38150b85c30c16be1e66fbd5281fafc4fd5745f. 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/SE6XY2285485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1f4a716e6d4da813d37ce31fc17e20806c148da67285b95b16fd26c3d5a82. 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/SE6XY2285481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dabf3cfd4cecd1129443165f54062247cba271c365f4727965d34cdac6da2cb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE6XY2285482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4878a006c85fa1756c0ec6337437bba134a96553c52030b9a9cd6db6e00e12. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:12Z), 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/SE6XX2526721.