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 0x0ee11d3425b3326cb11e8afcfe71dd04a55bd5f61148bbaaff4ea1176089ea2c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/033aa239-aa62-46cd-9d38-7e132d068e1e.json and https://artists.proofprofile.net/proofs/artist/033aa239-aa62-46cd-9d38-7e132d068e1e.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 0xbc9b393e063ff8938defa7da8d4471b3c8010d77498ab3a339d9aab254d5bb14. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZ5AB1622904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897dce7a4defd2dfec59d97b4e75c4a83fe0637aa17674a55ea30eb226cd71b5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US7VG1742830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee36e2e55d358d26654ec884c5383bd5a0e3b19d31d9294e02dc2972612a89ab. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US7VG1742834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d90c6bc6ada1d8135108ed564f7ab9c40a223ddb81db41a959f32a1a1acaf. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:03:07Z), 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/QZHZ32159751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a32361b21ed06e0a130a414682843c6c425bacdd6f022cd63283267e57883d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMZ92254541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838852cad977b7f537f7e00a01f2c66e260a47e806d782dadcccef715c398fb2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMZ92587454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc90e49a54639a35ea5cf5be307d11314d86e0e4a611b99f14735c527dac1e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMZ92587455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1628c43eb7582c97e9251cd4e4ff364f75fa80a0dd11b8e7dad1ef0102d48e7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMZ92587456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82df375eb20cb1e995e93581234de286b6616f71448ae0667af9ae2aa3fce58. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMZ92587457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e66dd0d5c455190a5ffbfffd294a702a0eb311e663c467af4c43b2de05c2bec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMZ92587459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f5986f3ce503131587369e88e3162f20b35e704cd8deafaeca6744601aa75. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:31Z), 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/QZMZ92587460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6051896d1568c306e556545ab5f594821a63ea6a0028180a86cd2c8b254abc5. 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/QZNJY2206677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641b8191414e413dd358f97d52111cbaf03eb4081b205b4369e737e80b76890a. 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/QZ5AB1700956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1c4b780c03b8508ca7a7e99e87488d5d56a4a7734a32681fc6f0bea498ee42. 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/QZ5AB2082229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf779651286b24e480f0a8f770f32a19403823db85b4a23b35ff9bfb3a4befbb4. 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/QZ5AB1700960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6051896d1568c306e556545ab5f594821a63ea6a0028180a86cd2c8b254abc5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJY2206677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5ac8f537d28c0bafb10febc17abfad037fbc128bddd6549311eed32e3867a8. 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/US7VG1696399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fd92bc1b49958bc42afa8a6ea6496040aeb8d69c2c1ae57dc5341195de5750. 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/US7VG1696403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b54318259655ce4fb1c9579e72e5e3927e1f13e3b6ce94813913eefddd5f40. 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/QZ5AB1700954.
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 0x9aa30a017e3abe64f8f11e3077b1fc00f39c2030ee4d3155497931debd1e9607. 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/QZ5AB1601220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356f27ba5bdfad084ce04a3863b4484d21e7e5acb48936247ea29658dc8911c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG1696761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d5a9ef703d92ae5e788a33fb19a8383b71f7fe596a350af6c6fde29e6f34a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US7VG1696429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ee42de59bc991ff752cd141884c87710dcc2e1ccf78837ae54568398368b6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US7VG1696439.