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 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 0xdf33da5309e827033a7f34c78e2dbd89a70f043a02d293aed14644fd0b5ab91e. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25c6abdb-2c77-40ca-8418-8956b04d9a9e.json and https://artists.proofprofile.net/proofs/artist/25c6abdb-2c77-40ca-8418-8956b04d9a9e.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 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 0xb4f0b587fa69e01dee8afcebff5211d15bf63f344f548afbc01c78a0e84c0fa1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32362958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056213c4e873c90c7b7c396a983dbe2df6a4bcc5ba6943a37644e5d708c5ada. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32362964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0e18742e69757d6f8d8be1fa9f8479873008a822c7da3c62d2cc2731c4869. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32362966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c18ee3a75493a22d69b388fe0b404491ace8818fad08b0dd0126e5c42fb332f. 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/CAWHO2013754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18328dbfa5f93a4b42edbc711e9e51a23306e9ea98bf59ba76f0864b2e2b7520. 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/US7VG1664070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bf86aa078ed9141b0d869ad7be5a0163c647197bf33e93ef730c614ea762b7. 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/US7VG1664072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937cf8578f61988f2d60c8ac6a410fe4bba873f3147ef15f227d640d6091b562. 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/US7VG1664074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449def56010448a1f8ff8f79e5aed7151051a09542b2de0de5807a9998aea52b. 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/US7VG1664076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fab89ed80328f8cf85262ae24302cac16a57b7a23006a152ea94f71848443a2. 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/US7VG1664077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffe26ed209f537c6c265b3ea7ad955f7119054c5869eeae1bfd03373b71a19c. 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/US7VG1664079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7698bd476b9038d72294d9d44011f67ef10f877c01e73de0654968fdb6945bd7. 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/US7VG1664081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04419dafa680520c9862e6dd7059afda5de5dc575e8591860dbbb5c9343a5274. 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/US7VG1663297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13633acb3cdcb671b9c266872fbb7f751545284acadb53cbe370aafa1775482e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG1663298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ebe9ca0b989a0b1a1584f23057aaa59ba4ab5619edf0d57f2d63856c13d8cd. 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/US7VG1663299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f53f50ae1371c03f12664ccf680a5a049cf32b4e4253bace5c894217804b46. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US7VG1663301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aa23d8728fb151fc5990bf71b99aa5f4ed1eccda0560130b65cf7962950c58. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/US7VG1663303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ec5b09bcc678ea16686f56d7b7f887eb896093939b6d38ff162cbe225df112. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US7VG1663305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411821a39bb8c83f7b5124f711a08800606df118db7200a67da625ff6ec18358. 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/US7VG1663310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe80701f395bfba1808c707a141984bb46bf5b5700de20e0eaa7af1a78c99b5e. 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/US7VG1663311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9fe2fa97ee8256283070a3c4f12996f496d33a40f55e17be29648c5c721ab2. 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/US7VG1661889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2529c070583b84c273545d73d757b62d9a2de62c79534addaa760a286019d6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US7VG1661895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5a506787398fe326109692a39ccd476604465a71b2068df10dd29bd61311c9. 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/US7VG1661899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d4653ac4ec2b6ef25876fd4eb8f3094e7f22107116e4516004a7476488491. 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/US7VG1661906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af5087820b05d286c0427fcbebf742b953d4146f9211700ca7c778a487cf2c1. 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/US7VG1660475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c47b0c44667b879eeb4e14350e27a6fc13ace7ae2b0b92d45512e33e9ce3d81. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US7VG1660476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43c2ff33dbbdb55e9587eb28a3531ac05ad28bd4801a039d12b85a47aebf561. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US7VG1660478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5066d7c14be867b6bb8361a42606ac19b6504f964887f7da810b681b3935d6. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/US7VG1660480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c5329c47067354061519d198e4cb05e02d9a6d48b7c1109b2cb5f332003694. 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/US7VG1660486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aaef4ce0bde234c4a1fb567cae9216bb463481bfc46efc9e5a9e54157318d0. 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/US7VG1660488.