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 0x69495542af945727052632b69c1aa95cdbf97b7700b147f8197594ec68c8b0b5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5598d419-b061-439b-b410-d6b0e0bd562a.json and https://artists.proofprofile.net/proofs/artist/5598d419-b061-439b-b410-d6b0e0bd562a.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 0x15d175e27c8e917986f6eb84f58bee06b5a4f0eefc89927450fbdb6d75927817. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USKO11500484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe564677225be43266aea7faa3940817b262492d536c69d7ada46c9101cb81ef9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USKO11600739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7883f2a69d532eb9b7da46994c13f53c0f76d16d0734cd3ed972c401e0f88c9a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USKO11600740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a9012acdd64d3b46f90ae939407f45444f2fd7cf598394302dda0b20031cc9. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USKO11600742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa52bad6e3b9e877a7e6568c5125108d124e6e6dc27c8bd59d88ef88c8eb03d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USKO11600746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df56db1e697b90d51e9a8e59964e03e0a177a8075eaa7e5c955c0d9cd8c27f. 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/USKO11600747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87d14a119f0c10bea6bb3a16ec5d8d422bd02771e16900e4fa5f6e7a14c55a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:00Z), 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/USKO11600748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dc74b0b889c2f3c01d09e220e236ac5f21018e32649ade107307ad8bd34207. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USKO11900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6899ad0550c93c2c180bbccad57002a89a88fc3a858154afa5eeaa90548d606a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:06:31Z), 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/USKO11900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f0018dfe1111c79805379f58a55f5cc23b6441e98d653a7b503b026a346df8. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USKO11900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70516692836d25280b3e53b859a64b569581c1c04f9b984888b05f558aa126ac. 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/USKO11900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb283055d23743004b22511f6c5f1672e3479f12b167f0dbc8fc5bdf8dd216a3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USKO11900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589fb9f2f46243d5cf97070db418ff8b518915d7179b487d9b06faa6b95e63e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:29:09Z), 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/USKO11900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e16802c915b6be3847419d38eaa6cfb1da41daf680b1da41678ccbcbc36e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USKO11900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a1ecf8c70609d1529e4fe9a0e3ef0f3645dbe035759fd550d04be1e508d0e. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:47:46Z), 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/USHM82332913.