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 0x77c97ee60ce823830a24570885ed408fdb4d85ffb1afeee37b4a309e3cd9bfd1. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1a12435-24ce-4fcd-929c-d9b9402dccd5.json and https://artists.proofprofile.net/proofs/artist/a1a12435-24ce-4fcd-929c-d9b9402dccd5.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 0xd063dd1e48246714116a4dc2468b0a16a3d97cbf410fe4007b7567b36aa212fc. 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/QZDA72124039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b744fd16628fb3ca11f2891f4928ac79e72d8f2169a6b1d6dc785a1ae831ecb. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZDA72124033.
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 0xb3f1e1b45118d01c0f7bc4cf041380ea635df084cf5033ca9ba28f280e1a6cd8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZDA72124035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8cf5a5d18a0f8036eb7aa0b35f6b21b8a4682de8678a9fdb0e2b7718511ed. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QZDA72124037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8001bd8a15fb5a709df0eb18355f6a39aff4260315baa8aedaebe034a9202c. 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/QZDA62158618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7372c5bb90baadfa5537315142dd7f51abdafd19d31b2ba4b7b8bedec3c6c0b8. 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/QZDA62158623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d2ad20981a9a9669d981d0d98d62c5ead1c83d6ad448e93962bc871c1fc10e. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZDA62158614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc328d5ea02ab4344c1def9df4555cc8ee160c6f3d26c809e3c7be1f62cef3c75. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDA62158615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dd204638fc46ecdb63f1d3dec9a2ca49e5a7425fff46b462ef1185cd7ca42b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZDA62158616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f96661cad4f3d2e7aa54201de6c8f0193846fca2f2d889efccc3897549e6060. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA62158619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84079fde34236403ec1f82d25130ee68befb106a503e22a10f120d44d1baa10. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZDA62158621.
Instrumentales Por Neto Schifanny, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90b45b61ccd35d97a8684be0a36974d0d990e3ec879be0ec0023f78ccad7d42. 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/ES75E2304904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bb0c0382dbc47158950b292c3047611427b1834094f03f5f530a7494483231. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES75E2304903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1985e184e3bc489e95310ce01b315ecf5a621b99d0dc190ece276493d5de0fa8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES75E2304906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272902d474a661e2d88e3e6d643f2f1348897d11bba993ae8dfbbdf49ed3107. 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/QM6P42348987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585cefaef9b12a42e4148ec596f238b94cdf676c8200e2bef4fc66dd825c8e42. 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/QZYFZ2459541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ddf1a41bb6c1c05d78bd7e72d2a318fc1107d87112114f19307675f69f9ace. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZYFZ2459542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487519b136ae4db7728cfd818bdd6f1d256b535bc622b636e51c1cb5ba123f74. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZYFZ2459544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257652e05926d2b7ce08a6ec2109013ee27d1ba43cf0cedf8229b174dede81e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZYFZ2459545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316a9913c6c26cbf11a480c7b5047e57e0f5b5b38ffd73c07696e9d821bac5b8. 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/QZYFZ2459547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7e0145ac0f0459e17d5eba25549cc8d70577cfc31922a75c2e3eb58d019980. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZYFZ2459548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eea8d754beb66720dc1ad0d285b83c6d3b1fd2bfdfc8966fa27e9743966547f. 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/QZYFZ2459550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8574d71bd1acff6473a217bd84458ba41e37ac6dd1040be7b5536c8d1d2d9a. 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/QZYFZ2459551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedfb704fcec7d8c2a336f9d468dca6e580a5884fd09b12d1077f3cdd9cc2683. 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/QZYFZ2459553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac41c21f3242f616381f4d6e054834c8ccf523e960418adee219642620f34b0. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZYFZ2459543.