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 0x13b9407f312f70de3938da45f70f82f0720652553de2f1d5b0d190ab3e0406a4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1e50d24-e8cc-40de-b55b-6bf36e104a48.json and https://artists.proofprofile.net/proofs/artist/b1e50d24-e8cc-40de-b55b-6bf36e104a48.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 0x7a1733da694e2acca3987d9e63cf7410f1426ed475a22f0bd4528a22b1774669. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T17:29:25Z), 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/TCAHZ2456430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda2103b0482ca508eee4f6f6c8e6349b34381f90cdba7cb6c480ac4ad6a8ca8. 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/TCAHZ2456442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc892e3b8939faa0930cf3144f61122a4cc30d189e1a7a50a79bd39e0d15e233. 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/TCAHZ2456451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7a8aff4cade9292c08f834b463acbf6272dc200e61eaf0cce7551eeb73319e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAHE2312651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c530dec56489342f2bdf0e02a2135e1cec830ea7b8ab4ca51c8d89826f2950f. 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/TCAHZ2456462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c381398ca334efb1ce1b8360982035008c86a588b00fdfe7639d009ef819c5. 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/TCAHZ2456478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512eecc227c336d28a99602e9f036d5a45cc7dd47a80b5f622fe46d9d003f10e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAHZ2456488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b5cdc654fcd8e42fd762c4f28db1b53b2f046347caedca178833ee98fe961e. 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/TCAHZ2456501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd075c75bb2a17b56ce57808fec252ec9051f08d394503211fa7ecaa1f0ca4f7. 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/TCAHB2399187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7a8aff4cade9292c08f834b463acbf6272dc200e61eaf0cce7551eeb73319e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAHE2312651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd075c75bb2a17b56ce57808fec252ec9051f08d394503211fa7ecaa1f0ca4f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAHB2399187.