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 0x75e0b814c8e6d90e0a69b4b32421df47e613c3305ea5472be62c5183fdb72ce6. 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/f74fef40-a3bc-473b-8336-15e2777a17cf.json and https://artists.proofprofile.net/proofs/artist/f74fef40-a3bc-473b-8336-15e2777a17cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Nochera: Latin American Music for Guitar
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 0x292f112d629f4e9f6dd5d9cef17440e891b11f328ac54f767d102ff128153442. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USDHM1725111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055845f897f4ee67e93c46bad44a13b90ed654fd932d564204f451c917f99021. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USDHM1725112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af5e7717d302af84749bab6314e1b618ce07fa6051f4c9edea7596c77985c78. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USDHM1725117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c2a8cb0d46880ca2a3a0767923779fa5f66e1c81d6e3e803b39e14daa981c7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USDHM1916960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de77bc45fa4256c629cf4288388be40d2540dd97c5bc24779d55cdff6aa04bd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USDHM1916961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa259d4cc89a56ecac363f99bc13e28bec01afac2300b718ada742acdad143c7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/USDHM1916964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3c022e2de25e688b2d0415346e4d599023335784d7216799ef23400a887cb9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:49:39Z), 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/USDHM1916965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa74c973de93c36bcb660b94ac6b712d70543d663c0286766ebe16816d90e80. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDHM1916967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a279e024a514f940dc112268ecee7b56dea175613b18b4b1395632624849a6. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USDHM1916970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c62772f378715d5c13a55f93a94528ee873714649f9f82d34047017efffe0b. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/USDHM1916971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948ab363c753003a6c518111bc3a935b5c1ffe3a8ea7ac8cdffd85795208e2f3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:58Z), 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/USDHM1916972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656babc8492ef9b456f8ef7bfc70fca40b756540455579a08d4e8e891a17bb1a. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:19:32Z), 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/USDHM1916973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ce1a1885340f65a2de22099e42964e699c67b32e47b29c981792ff10ac109c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:23:07Z), 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/USDHM1916974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dfb26aceb49f716c303a269a271c39cfe95ddd6a9e13b4e1aefdfffb8cded3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USDHM1921628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309424c4e5d617dc382c9dc1b78b8989c9fe51cd39852ab87e4e8b751f29da9e. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USDHM1921630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9c46e7bbb2b9f790b172b544ab7aa57e28d15539c1dfeac1715bdff07c5567. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:24Z), 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/USDHM1921634.