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 0xecd437f5787b50efc3065669bc3147219915cec34f871f5cfe98706dbb058c55. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/923212b6-c8a5-4a5a-b310-3650121d3113.json and https://artists.proofprofile.net/proofs/artist/923212b6-c8a5-4a5a-b310-3650121d3113.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 0x6c8be3f01ab85158e3cd9577b636fc23e00b2998b8fc922dbaad4f77aecffd47. 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/TCABT1488031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5d98cabb5c8bc4e92c9f7c65d60224f916ab146fa08375be9562488af10d4c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABT1488032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86193ad4af19fea081b7fc6d1e436650dc579912968717ec2b10bc60bb36444. 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/TCABT1494339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efdb582a74cce32c66c484f8ab8dc3df5ba1651a6e4b2590d42a746e5f75823. 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/TCABT1494348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31506e78ce9364b70de55cd66cd1a28bda7e0067cab7e6d801890ae90998353. 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/TCABT1494350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa48a4e2a6453757ad90f6d69ca1af7d941db906e0300126dab377d05b81a97. 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/TCABT1494351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0814daa1bd09860c3e75408b9158365e52655869046c8078fb039201846178. 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/TCABT1494352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc21288dfe99e68552080c73a5b0ca2990f0e6ed3932f85eb5933ec6c34b889. 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/TCABT1494353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e6881e300a3b1f257684757204f0fcd1448b3877390d04ca8e0d7fba97cfb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABT1494354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da6a46d00cc34a19e8022ac5531f754f8fe91833fffaa5a58dfef321098cece. 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/TCABT1494355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8fe27ce2292375a32271417c2749816c919efc027203eb8219f11ed2389a5d. 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/TCABT1494387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c87edb6cf872dbd698cc7536336488b720704bd2d8b39f90159214f88bd371. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCABT1494388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dba302b087b5df553e18b12052b0c722d77918530a9b5dd17d6aac285e714a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEG931951025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a927866c794245157fb24e254e72b6f9efdf6014c1d99b7fca3d37cdd4bb9. 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/SE62M2259234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9194a2ddbcb43456b885e42ab7105f112d4e5c437523ccb5edb309e919ce6b. 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/USHMD1725302.