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 0x53a7290ae61401baf37bae6448632fe3f07510f3c8908faebb5892018eadc780. 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/9da55605-5ada-4322-8380-4bc88b52227c.json and https://artists.proofprofile.net/proofs/artist/9da55605-5ada-4322-8380-4bc88b52227c.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 0x691e61b0dca53d099e781a65ee38e3a54a82c2b265fa70b2498edbd25257c176. 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/QZTB72447296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8191bc7ce97aba16a6efc747f7f230f447a835f567e5206285b8b60bb1ebe5. 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/QZNWU2493771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbe1d2c963bb1bb054b2ebcd5f56f1420c49661a32c0684b3c2c601c00f0f70. 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/US3DF2439145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf925a14659abbe48c8b68b635f4d36ff23b8f3af9caef8afa3e163bd3d2cbf65. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2420085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1096aefa7d9b6ce635e23f009100483b306c73ababfa4a2541e11f1924fa6b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:49:41Z), 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/US3DF2439144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e4e67c51609ca64ec2cd89ef486712adf3642b037ba9c7a359b37335280fb9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:51Z), 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/US3DF2439143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e9b0d6a6b6fce7ad5d3e87b1bfdf393be0c5e5d7472cf1b809c6b9a8a033e7. 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/US3DF2439978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf925a14659abbe48c8b68b635f4d36ff23b8f3af9caef8afa3e163bd3d2cbf65. 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/US3DF2420085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d32670664bbc5cb1233349c66be55ec7fc18834785ed9af4d3930b0f20536d8. 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/QZDA52434788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72505ee2579e16f8ae3bddf63e95820f783d2aaaa15907d887d7c2e264cb3851. 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/QZFZ22468006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0a9d2c14852b701641106cd77d89730d13677f935f0fabfb64f892f7c8b9b0. 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/QZFZ22468007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5522cc4f271f13af35eb5da84a8e4dbbfcb0471f5b61ea476f577ac6210d42ea. 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/QZWFR2353866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d952c0d447e497ed43e4dbdfe32b4bd80f9175dd04bbdce2dc96bc72edf5529. 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/QZWFH2390679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3ac2d2ed4e1995977c556c4efcbff190141bc1192671c821f83f58690a7ad5. 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/QZWFF2360622.