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 0xb424a029c1a435bd43e810dc624ab2d01c12768d90233449f9735e070cb4d75c. 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/e1b63b8d-fe8b-4d30-a7a2-39ecdb7b73dd.json and https://artists.proofprofile.net/proofs/artist/e1b63b8d-fe8b-4d30-a7a2-39ecdb7b73dd.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 0x44d1801bd891d2fc15ef249deb2f94cebad888a9fc288f652e6bcfdbea6ce771. 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/USY282324259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d240d17996cfb048870b657b20cf21fbe779cdeb74ba96716874f3576e3376d. 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/USCGH2470768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1670ee390e69c2ae8b1e2f43a9d6cb224d6c41ebbd518ba3e9e746aa4dd79731. 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/USCGH2470770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe9f40d1a57bcf8af243f01e6eb9d756a068d3e2843fcbd342b2b3dc81b87bd. 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/USCGH2470771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc357cc84a86241f35ef727f01a53b2c099c8b1bc4d373a3246ef61f768d696d1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USCGH2470766.
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 0xdf6128a5009598a633ea3d04b68f3ad1c18da3e71f93548d43b582a51a9fa22e. 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/USCGH2470767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd223a08384a66a52dce20a38efc70b2c6745e2f20fb25615121705c5f165a3c2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGH2470769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4fbe0caea685425f381dcaca3c1662fab42fe15d0755be05f1eef753c4c75c. 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/SE6TC2100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa995aad64b79b97850a676938c2b9312769fdc1b926375b7dcb14e4f685f93c8. 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/USCGH2046022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427db2cb21672416b5ecb1396f97858804dc96a28ebf6c3dd20610a9d7a7df92. 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/USCGH2046025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b920e3d339f89e9ac7d13f8f6339a3c15367578b0ee730c4f127fcce2d6203. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USCGH2046023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3b819309ef3ee7faca0c067b19cf702a244e18ea450cb6a6202e1f6a6cd78c. 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/USCGH1923053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd46121995952c68682aa124a4b9d798b9d8ab907eb497dc42954b640de50f5c. 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/SEYOK1763339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d5f4fabc70c1ec12237dc0bb3cf5bf239f695136dfc794de6c02345869d51d. 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/SEYOK1763343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc083a2207d8c06d0880fc5f58cedc70ffd8ac1f7138cdc9fdc04fef2f0fae6c9. 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/SEYOK1763340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c5d1a44f25e31abfcfb52f300bad31816fc30cf75a08550b05dbcb78188fd. 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/SEYOK1763344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb106b7b6ee60497f4616c9916861d32753d7c8b7869a07fb9a0f6823f714d3. 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/SEYOK1763341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e62f148b29e7333c7a84b6c114159ef43d5c9697a2f7b8494b9b90e00131993. 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/SEYOK1763346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4286ccbb1a25d4434bbdab1a304dcf11c218d154354a3db2d5f0b63d520479bf. 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/SEYOK1763348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7452454069790b912ef00f2f999f0a16b2d02de6ee165810383dbd1d225f5771. 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/SEYOK1763345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ec4ac69051d195709f9224d83541d91c489cae29c67bbec06a0a556d2bddc2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEYOK1763342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70393b7928d3cd79bb3c7c040ff0d9076cfea02aa43b94372e0fed51cda1205. 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/SEYOK1763347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173e465a2b6966776ee7ef038570b5f48512d798ff05bd5c3103e337e8047111. 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/SEYOK1667197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff6bf2f0e092243654ea8716e1f92aa20c2de17e150934d0a855fb9cc5b841. 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/SEYOK1667203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9537eeb2f3875134de194a06e17c7b15ef92a4e7b3ea1017022fb41c67b486c0. 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/SEYOK1667199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778cf94a3e1dfbbf83909955cee5c44607e6117c2c46b8e742a7559141d796b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SEYOK1667196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec02002c42c2cd7be811f1a093c6552905725665f61d43f03f1054ea839933b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEYOK1667201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd600bebb7c52b09e90b573f2a93a1b91e62526e32ee17039c7a9423faa20f709. 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/SEYOK1667202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92f6c35532ab332822a9608ddd4f8b709be1d5a58791d032d484eb83ba89db. 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/SEYOK1667198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7803013e63549e4b54092cbba515ea2250760cf0338bf3e2af6704b09291a7c. 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/USHM92239526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66522480984a428a6eb285bb93af21f40a814028c0886356b66ef2dbe8f426bc. 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/USHM92486110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b4280dbc2b73989c04a886790fc8e20e94d6fa69925a7b0c848416d8e4c14. 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/USHM92486111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee593db138054ed1c5fbbe37fa5bd90cf50dd769230b33eaec340fbe964274f8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM92486108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2630919b39eae0cc18aa35cc4cc45e9779c2edcaffae8b98e1b84858a8b41b. 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/USHM82537700.