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 0xf88f001006b2dd710b511020610b6d6c6eb51c0f8473cd5ca7f5841856b37db3. 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/959c0067-fb2e-4274-9e59-3e3794ba5657.json and https://artists.proofprofile.net/proofs/artist/959c0067-fb2e-4274-9e59-3e3794ba5657.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 0x8ff80ace7093e8b586a762f3fea8a262149cdee42dab2a4c4888f879872135f7. 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/NLZ292400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6731d530dfd045a73e14f3ed6b217e8b5f8d21798eb4ebcdd9fc0e13077617f. 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/NLZ292400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb66daafad6f6d755b53513d881a2376eaadcc01928f0b1536cd3a921c983c3. 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/NLZ292300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db492d3dc40a48eba3f044965723272edd55aae139f909cd0ef1e3aa2c4ed66. 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/NLZ292300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5533dc7cf4a83598aa71d2eac3aeadbd25646e1031e895142a2ec778f6f7ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLSB72201650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947c3a24b1dfaeb0cbe7a22fc9f78ea01765cc1621c8ab778251ab1fdac99214. 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/NLZ292300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb66daafad6f6d755b53513d881a2376eaadcc01928f0b1536cd3a921c983c3. 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/NLZ292300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5533dc7cf4a83598aa71d2eac3aeadbd25646e1031e895142a2ec778f6f7ea. 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/NLSB72201650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7c3747216292688259cd8460c9a37d7051306dcd10747361e34e39e7aed1d. 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/NLSB72100505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc5b6cb0e50828be0341a015d42a48e74b346eb1697b4d77ffb17ce4784e12. 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/NLSB72100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849d003a34ac0871ee3ae1b51b6634d60c84b5ee09c2233dcba533f535478fb1. 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/NLSB72100507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f278f2acc2bc3ef4074de147622164181fb8e2e61c35cec4e643413a030ec5. 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/NLSB72100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8a774acf69a3a50c8df3437ddb37021124109c78340c689af6fb7801ccdb2. 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/NLSB72100509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a5c7bd7d7141eacac421c19cba74a780a8ed061d6379f78a59741e54ae63b. 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/QZHNB2183410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e916d6c065196a1970e2ee7920bf0ae2c844360d4e543fc05865bff01f6c24. 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/QZHNB2183411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022246a9e6b006cb04f8c3f357762c573e597e719202aefaa07c988d5ea6d662. 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/QZHNB2183412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f570821d2e3af8868519c15d06ac3cd83bc2f2a9c58996e664157c99e8bb01e. 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/QZHNB2183413.