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 0x6e62908438325f64ed02872dd9a5376ff897d043cda25af65eccf756bceb4971. 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/5781f748-958e-4086-89ac-305c3d664930.json and https://artists.proofprofile.net/proofs/artist/5781f748-958e-4086-89ac-305c3d664930.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 0x2fc928d0ede2c6ea397480fbcd8a24e5de57f88fd0cc382f606c456187af893b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE4P51400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceb5fc8b4b26c63d2fa3a354a4b160133a2ce8809a3096721e7c7e18c1f52c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE4P51400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683506a12171c5faa98484f6b5d6bec0a2b897373a7a6a1c0d4986fbae211ef3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SE4P51400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6485c8e9ced7bc5f413fe6c20610ac0c735b2da4657f376a3434d1ec31ccbf1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE4P51400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd812dbb3be194186df47f90ad94eeeb6ebae804e2d08a75311189f72924b2c18. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:43Z), 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/SE4P51400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6cbd22460e1204524fc449a527d41911f2e90e942687c7b2b8c699f0d4d873. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE4P51400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc878f539f65cd56cb5fa5401ac5ef581ba99d0a536d4eac53e5507a3dd50b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SE4P51400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb521957b1bcc1220e712dc82565eae944ecb4c3459ec5df0d26aaff0d17cb84f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:37:16Z), 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/SE4P51400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd10896a9558f8690fcb631e2994b88be2394869def58ebff0815f32d6dc5843. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE4P51400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0c0143616919d466904568fee854412f4699d7317457d10ec886f01ef1c63c. 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/SE4P51400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13533accb9fbe982b52aa51f89057c26dfa1a166077f1332aa250f51e6663d5. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SE4P51400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a614913ca7f05e9f29a3a263db910538ece6eb2e227dcbbe4b45ee9cef8e93. 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/SE4P51400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03206a4b14b86aebd6f4a182f9e6760d3335eef096b20f3986151e600a00290e. 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/USA2P2448761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749c4101dce209605ebf49a92dcbac1d79c7470805b1ff521bd7692a7ace5fc5. 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/SEYOK1709257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52e301a065ea57178d22565f6aeb74d66bcdec12f58f17ab55fad4af1dedb7a. 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/SEYOK1703940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb992d7f6ee83eeb92fe16c3e8c5affdac8a1f762d62a89d3e2a2a6eddf336797. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEYOK1709660.
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 0x72e9fb8b9c53e22cbf4d4dd639bc9319cfc1e9022c0fdb211ec6716daac87c9e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEYOK1703887.