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 0x6a94d3c9df18294504da68060d6bc5dcfdc2510ffacf2f3e17bcccc87a09c1ef. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbad59a8-35ad-41a2-9ed8-7bce0dc0e0f2.json and https://artists.proofprofile.net/proofs/artist/bbad59a8-35ad-41a2-9ed8-7bce0dc0e0f2.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 0x44f835d2bfa1f14d4c508f5d6cad09c3394ab6d6cd037118fb3ba19aeefb4de3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6G2565939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2be38b467452abfff7c5447969f922aee61696820c27b3ce62f4ba906de5a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6G2565941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ebd51e06ff67910a3bcf7f96c751c57667421acff9ce4b52ec9451d35ea43a. 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/QZK6G2565945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33577f375817a4cae62123c9c3ae6ebb102f5bebfc5b4e40a4c5c958605bca. 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/QZK6G2565948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef348aa119bf8d72c4d0ec6893708e3d3791dd17768fcaee316db97fecaf05a. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:02:08Z), 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/QZK6G2565949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e54442dfc9ab4bf412c9083bcdb8849c19d71c1970dc4f66ea9cf9850aadd7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6G2565950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da94e2db77cb9fea09261c1f987613f2c253dabcfda21de4e0a622c68f02e11. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:26:05Z), 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/QZK6G2565952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf820201b263aa78348380ae271305a794f8356e51af5c4b9526c35d45903fd. 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/QZTAY2516296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2bfb29fc065d689f7c9324fb08494d067b8abfe0d9e28c64b9397e020c9f1. 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/QZTAY2516297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0045b6c835a31cdd53f08c1ccd70eb0c87b8089496c87e49faf3307f98e0f2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTAY2516298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be987bc935495a199147e935d250e63dcd70c97394c55d41db3e32cd0ecb889. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAY2516299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555327d5464eafc60b294cd8a8937ac8bed9009d92fdc175a58f304927956633. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2516300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5ab76589bbc759fa16b8be43736b7fa10842eae4365a8d02353b2ccba648c7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAY2516301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0849c0a5b75ed3b03f64bd5f181ffae44ba8a8803827b50e515b857cda91cf67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2516302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade46cd3ec68723d5a7487e989abbb790e00e1b739be0233aa3dcfaa9e2e8a59. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAY2516303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dabfb0a5126f34053264e4f08211882ef35cd9ab9ce2dd38c8eb9cfe85fec2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7M2590724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917f4fc1f2798ea0f096c907b96d0ae5f3ec9843cfd382f1d50f379030a9248d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7M2590725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a6bcdd4a17b3b6709fa740e6bb5927460b38ecbb50823827fbc1f3ad046214. 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/QZZ7M2590726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c5621deb5640a3f277ff25c2add3851f23774c6bea1fa5a8c1cc9fd3f8a363. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7M2590727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17cfb90c915bbdf423452c32664b60026c748f6d524b6e2324d3b655206dcbe. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZ7M2590728.