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 0x0db2a0713aea335945c23b6577755c8cf02a5ffaad8c23f1f3f96078d8f0e6bb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dccbeb58-6acf-4773-9f6d-14bb5cc2042b.json and https://artists.proofprofile.net/proofs/artist/dccbeb58-6acf-4773-9f6d-14bb5cc2042b.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 0x3f7a86a4690bc8389c73500bc3c88117f2e1eaebe12d525ca331e62ae8192dba. 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/QZK6P1936569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62fbe232bbc29cf9246d0c88e3635deddcfdd068b2e7f6990b6f86d6efe25e7. 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/QZK6P1936571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afad3d4297fa167c16d54430b719a8712ec9dc53532237179d669aaef11efd8. 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/QZK6P1936572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20addea31b9fbd95fa280a0cdacf1ffe67daa8a438d43790cfa24e0d2fd1b5ef. 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/INO132103783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2feb4569664baba67d2b07c1b0aec3177e4af9ca9ec53e04cc579284c53542b. 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/INO132103786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b547d6be6afa3ecab5afa038da3bc0778ad620f6a1b2aa3f177746975f6cce. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:41:36Z), 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/INO132103781.
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 0x1298967c9e3e2c0a3e8104146a19ec8bd9c8ebcd892d3bdcd57fd94a2af03ab8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:39:38Z), 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/INO132103784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b7e3f44d73a75eecd11d37fa0de2bbc46f3ed04e6ec126fe7f115227f633ea. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/INO132103782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f390bb6c01b146696d2c728dba79d90d963e8f6f768fcbf329270f5008d5ae. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/INO132103787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50ccd9ddb9b6285bdf9353b9aa820876a4d32b7119a3c8586a1da55dd5cef1f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/INO132103788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5da1ad062c6592a4d6e2fc1488eff6fad43ceeb96b0af1fe4cdc7254126026a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/INO132103789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494e41a8bf010f7f2f8f7d4cd0fc2b5aa8517eefcd41bbfcb5a1809911dcfa3d. 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/TCAJF2513458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73653ff0987dbfb0d375983db220acabb5e0464d0e04aae9a909eeaa351c8f3f. 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/TCAIC2457497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061c0f475b65696606386461073137bc7f327632dfb75f353bb8fa7257134966. 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/INO131603691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00e1c671fc32b645d2221fe06b2db090c6bcbc6d7a27762c4dd453a40a0d2a0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INO131603694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8888153083ba89c4af4d753da1b0d3b277dee6eec467ff23a26b1eabe2451b5. 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/INO131603690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92229790a1897572a2ba4b5749188b4e4e0daaaa79322dba699ead2d3e356b5b. 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/INO131603692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab5d86dc1dae55b8ebd88b40268b87fe1c3528f315dd821a336000f9c2f02d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/INO131603693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce827fec2534a29e17421060516e3fd35edc487c77aefc228ec2121b0931da79. 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/US6R21524132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83285b1cb559189d51af5249b1e1a4199ab03eddee1804515b9ee04550ff3a8b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US6R21524129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a8c345029c662813d852d9c35ee04857071a8dabdcf9d663a3ab2bcd3ea811. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US6R21524130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0db4b9e3ff00dd437792f3c28754285bf2d148019bb76e7794b6c306e2a32a. 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/US6R21524131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f4783813db49371ce9324a2087fd7cb39690f35214132b3803d8cfb44fec3e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCADG1704644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7720afcc0195e891b24f7e37bf5a78d80e834748fed2aa766ffdae7a2e939cc. 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/TCADG1704647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098639fc9af42b90cc7efa271e80e65d736e62a3a9cb3c951dd72586cbaf752. 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/TCADG1704665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c411defeae9b4e0288dae8f7750b19e5f267f9bee5480bd891bbdc3cb2e8b3. 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/TCADG1704672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bd915473adfd0892cedb91eeca5f16fcf3468bbe5bd0faad72912bc7991d6d. 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/QZK6P1910792.