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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb74ecd020cb98963fe6306ccf0f59ac39dd682ca29a29cdc4229ca10ef60383. 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/d8b051fe-7e96-4fd4-b55c-4e63f7fb9227.json and https://artists.proofprofile.net/proofs/artist/d8b051fe-7e96-4fd4-b55c-4e63f7fb9227.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ccaf49044f98b4e85feb88e6dda0c9e4b12d9fc400337c68aee6a3032db32a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NOBHG1020010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf651267bccfba93459cfecc5a860d1c711bf2b63bffcafcdf5297404f06c0c4e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOBHG1478010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d51e04f620df2f25463cad1087fa5f2f471e831d60d2a2b008a15da938d4a8. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/NOBHG1898030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0e057142344ff9b392b69d134f4ca1bfe08e4cec79e48f5fd295ab68c3ea00. 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/NOBHG1797010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601f8b2fa0ff8e9ec697faec55476b4ad78c2aca23ef2291367b3f110d3a464a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NOBHG2002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0652c872386ad8cd8412b7c70c0cef9ebc71e5905181609295b421cf83ee65. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NOYNA2202050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7514e6c76b1b90a0c0c3340fc94b66e339281ef5dbed8bb0354c7846816e321d. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/NOYNA2202090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b12acb78d83dc547f2ebbb653d4420bee73795678aafebff7aead7573a4cda4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NOYNA2302120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b257281cf8325a6d2ef47a8643158c22a183a32ecf0c91c0c6d70822eda06b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NOYNA2412150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12246f109f89932b09c47e2fc148f98cf3e9561771b851da34192d806b71273. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NOYNA2502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6353b7c6bbc52ea927f2cbdfcffb3b5e8f9ead13e8a3b2bfb44494f6f4a8599a. 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/NOYNA2402130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b12acb78d83dc547f2ebbb653d4420bee73795678aafebff7aead7573a4cda4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NOYNA2302120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b257281cf8325a6d2ef47a8643158c22a183a32ecf0c91c0c6d70822eda06b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NOYNA2412150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3d47c228a553080c5d878db69cd49904d2e6cfb28afd05523305882fb2077. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NOYNA2503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ae1339e77c7e284431c2466732f067098491caad1229f751bf9e487a40dbc. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/NOYNA2503070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643cc3333d471a72c510fd69874bb42a0e5f21cc97ceef1f1f024631c670ca00. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOYNA2503080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6f074088b3d805f58e09bc5cb51dfa5a9ccf2f99f516802a6f301aa6b9dbe9. 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/NOYNA2503090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6051ba75e5717a26fdb1a8aec36787b7fea83f9e2d98241197a0f6981ab49fd8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOYNA2503100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fab7a963f427b3c4a19bb857ac65206c73fad078c1825f5c4ef94b771d4ac9. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/NOYNA2503110.