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 0x5cf515a6464e4ce136458823e56ae827913394f76dfbaa78fe018a566fc327ac. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c494d6ff-b44d-48e1-8833-9076f0c8fc9f.json and https://artists.proofprofile.net/proofs/artist/c494d6ff-b44d-48e1-8833-9076f0c8fc9f.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 0x55f4917f37b7f3b4eb992be51942f6acc593eff2669080e5abc1d361e393b31e. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USYMW0701701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39338165b14b10cd543986440bf81b1c515b67b8d34da93c865f09117fc8e9a. 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/USYMW0701702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67f734f1db1c69267a0697547756c8d53577d03d63358df09fac799531829da. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:56:21Z), 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/USYMW0701703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe714f04c44491a7fb181c8497292a2d4c68efa40cb99c040b5f7e8b6240a0dde. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:42Z), 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/USYMW0701704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d76ef03fde4b81f61795aa5684be9b27230f21e4735a116188492b78fe9be0. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USYMW0701705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236cbc5a8eb53f0da73537c68db098ce9bbe868745341ed97abab487b659ddf2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USYMW0701706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ac1849e5cc9789f4ba5e4013f84e63690a9c837833a70e884c41853720770. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:42:33Z), 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/USYMW0701707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a069f73835b45aef72deb3fb689ec5ef51c9d354bc4a0947198679614ffc20. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:49:52Z), 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/USYMW0701709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f9638591095137997fdcbc2cd9405992c5ff7a1efcea32cd754a9e61700d8. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USYMW0701710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eb94b290447992c37dc913493b90d44143932614a93c2f80229de5d6d35dd2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:58Z), 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/QZHZ42123336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1797fd7e368fc23b6f4ab7c0d5ecba1a0c60c7618d1726733c35c7fc32b47b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:52:46Z), 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/QZHZ42123337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976d0618b294f08d6bb2ddfa50a89fe25921b8e42d2744fffd8dc4df57a6d741. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:31Z), 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/QZHZ42123339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdf7f1c65ddadfe20698aaca82801f01de491f7b598494ec78ab5fe4e1f83df. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZTVM2158758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec4c4f5f8dd8f7b839c157f3478c5e5e5e232847906cfb8353c4158abe8bf0e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZTVM2158759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab589a3a0f33ccb939891fa93a78f394e6eb5984d7bda6dbd3819026aaad625. 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/QZTVM2158762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed58aa271696d149324d3facbf40cfbd2d64b885f0e39cc6afc3bb253fcc493. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:31:21Z), 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/QZTVM2158767.