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 0x0659bc6630f7d8ab7107ce4f84497ccc679b288f320acd695b58b54a22be1ef8. 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/0f6ac1f1-25a8-453c-9ad7-88a45d9932c0.json and https://artists.proofprofile.net/proofs/artist/0f6ac1f1-25a8-453c-9ad7-88a45d9932c0.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 0x59d417050d67c01469a33190faeb1da0f823a2ac4f030aac81a4d3247e9f184b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAEI1915598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19c8cc6caea20796d8c3c32c923cb649f2ebb6a370b35fa2eec13036b1f2377. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:55Z), 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/INA4Z2200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898ccf11546f5a9378aa15204306665b0a15e3e8c35d5c939a79b10bb365829. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INA4Z2200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79474f3c01f12a015d2af1fd18de3414ad49e9b52031f9b946cee351e08a1255. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INA4Z2200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce503ba05ae5f61181bcbd1afd93288f563bd3c3054820bea6ce6479942e71b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/INA4Z2200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7b787c1e12b80148b2397a51a88097a07cb118aa219e3a2d0914018827584a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INA4Z2200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684a4175bf58ea5ce18392df2fd5cebaa931a9ba0dea6df78f8db7dfcd038553. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INA4Z2200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19468a9a23283483d27cf27f596ef28e73e197a93401908e9e91d6f72cfc2311. 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/INA4Z2200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b6b451c5b4eb37ad63a06ab740f97672289c59b2ab5c51ceeb59230e105dff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INA4Z2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e599435e7dce33d6e930336c8660722c6c6b7730843118de182c8778b7e35f. 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/INA4Z2200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c14fde55e39d07ef26a0d983bc10a79ba08436954c42e50bcb8ef2d536c5be0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/INW262535350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8390fc7b4191d84136e4146a47f0a5de97e0008db56a5cf3ff7767f3f9fe067e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282531135.