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 0xbba409dd6f1b02c9237ed485263cd0e683675188c27ab7d5d1dbbd99ffa005eb. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfdc98c4-ec0d-409d-810d-e94a47b4e462.json and https://artists.proofprofile.net/proofs/artist/dfdc98c4-ec0d-409d-810d-e94a47b4e462.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 0x8097dcd214ea8da60c0f9c3f42df0c85824de670289d4ca60b1000e5e0f5ae92. 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/PLI292100381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe796db4305b31411303d170723b77b19717350c4d10a308295d7bea8a89b98e8. 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/PLI292100384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaef1b973be1b7b63c8dbfb1157c4c71914ea2b81a31529f2b3afbf10e79d6b. 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/PLI292100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceac308110b36e667341fbc7e637561501ccaeec6b104248bbf29b070a35ba6f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PLI292100378.
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 0x91b473a45bd8d2296b4303d2e11e211024ae0dcd3bfc87c8869d0e95052d639e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLI292100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640390db7efe22a4570741e5f388abc7b9cf6fabdaf8ba6d32a044de86323828. 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/PLI292100385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6205659e49a307c46c5ad55d6f4a89b1d7c63df12102f7d4af780c1411a983d. 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/PLI292100370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436824e1f513ebfbdf14a8aa9200321f115ebb8f556b15356e305919c623af38. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLI292100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e862a6cf962a096f950320ce2aeefa8067ada193166e464709637f89a788a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PLI292100369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427b7ff39722ae7ae751d32555ea91189e726133242d3b5884b9995475a32ac0. 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/PLI292100371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f48c80a9886ac829b86cb9c05446c2b3ddd7d01c8a18294b55a49b642b5858. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLI292100373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb93d857df3ffc41b7a6b7d4bf1ad20591ba041a8ef50d0fe7e73a252dd80a2. 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/PLI292100374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b02251116f97446824e84eb26c451c3a67e125212cded5cdebf14438a7a5a51. 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/PLI292100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ea3c27045188c06ff3b630223d811a1804cd756967f8cc0f4456f76b71147. 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/QZES82504290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7da17573525a6a80c4c9fef8d5b4786c87c82c03047c7d054bc524e50b957f. 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/QZES82504291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad500abab35fc8c501bf185cd78716cff00986c39fdd7fd0014e348052bf7d6. 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/QZES82504292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf151e1c4ede901aa46d0ce0bc70af62c11f920ccc6d9d5ff5387ee77de82f7. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZES82504285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cdf2b475645efc07c0a9c12f7b09e3af21727d92a91873ecfde408e4c6026f. 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/QZES82504286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f53eb85b4f478d029a795133a000c399d4533cf01148454c7692b3a6c8247. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZES82504287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8bb6a9b9908c50beb8ad88e6b74cdfa77391a859e9476d0b529feae70c0079. 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/QZES82504288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec5fbe595855cdff9ddbba29fbe9357d3d317b23fda4534feec3b495ddcef01. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZES82504289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162788159ca54cb919632b46b6a55cf0b6225251712eab96dbb635f7434db70c. 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/PLI292100394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8887e10c46f05bb86e4eb004bdcf1ba17acfde7598eedf0e8f93e0327396af4f. 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/PLI292100401.