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 0x7f7445f620ec73e8833e49075dc6c536c6e1050b4b6bd59d10e14f57910d705e. 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/0d232b20-6544-4b70-854b-ea1401be8279.json and https://artists.proofprofile.net/proofs/artist/0d232b20-6544-4b70-854b-ea1401be8279.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 0xd3aaae2d440c84ba1803f0c97962295a9b3468eb53dee03e4644a01899e74eff. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFR2444445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6f8ea66ff99be2303227ccd9a668137aa8de06df47e6d03eb5f4b2254ab91. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:05:38Z), 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/QZWFR2444446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ddc416565dcf95b1acaa4979ef4ab094efc414f4b0cf121c9587154de1d6a3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7S2421076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4b2eda9b33d5ba20c92b86b1e09e7c8d0d2cc683b158f745b8ac1ef0ac1602. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7S2421077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f28a07a5e3e95deefd90716b5e2dfbff1a40923700f25747eb03d9c1394bb9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7S2421078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5688a88b840456369c540ee9e7890a1d14051122d451b083c6112eced138db. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:16Z), 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/QZMEM2576111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e3edd49e28810721ffa67e9835c9c05717ab5864ba873a05e3515c7d833484. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:04Z), 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/QZMEM2576112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20763f704504cf5e2ae6337f63b61ffa078eac9c7d8ea5208068178be43a9b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2576114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35208d8cc2a8c77910b7f687c382753ed28c164076fe80527d9292c3a40c3eb4. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFR2459520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4018b4539d4737145d82bdd9e7a507aed4978c92d069056fcbe3f24b0947ca1b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWFR2459519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7998a34a900cd794978704bad67d297663e6e1cab3e4c4fddf1b37dbc238b14. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEM2576115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530849ec9c5888d7207feb56d91ccbe9966ba758c26da49894a3484b41391e22. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZWFQ2429649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d266f8611ecf18e185b2ac6f04dfe8ccb104647a99bb2b6290d0609f6fcf7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFR2459522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026fe6646b4885746475b61ce4dcb115d0a812d267b5433f70e8402d4fa59ca1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFQ2429651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8ed0b55ec00ed655d3355331c6fdbe0003e704a01702c74e033a74bd662f8e. 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/QZWFQ2429648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b6b8a6f58f12f180b3bf5f2e1f4a49c72794d4daa49c4e27000dd4d5ae3c8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:10:31Z), 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/QZWFR2444447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333f51b854b1f638c3b67c98f022c47abcdc5f9ba247591347bb8b9cbd5084d7. 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/QT3FA2564025.