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 0xf5b1959cc1d43bce404ae2739fd75dc58536d00ebe21a789f8fdf21ded2701b4. 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/77a0cea8-225c-4585-ab47-4f197d4091a9.json and https://artists.proofprofile.net/proofs/artist/77a0cea8-225c-4585-ab47-4f197d4091a9.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 0x4378015c2450bae4683beed274a120dcb613622ae393f0aa7d04e94d9676e08d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:07:46Z), 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/USAT21700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf80b64640a815c41b01c9b4e99b0f42afefc991f160f403bdf08663814c9930. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:35:25Z), 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/USUYG1162358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47faefc534cdaad50be386fb041e1668dfc19e83ec4200b608525b3974110329. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USUYG1168575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0506423ded2e12494598b3733aa0551b0a1fe20fcd2374b50a847f5c8f64629. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USUYG1181974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa17cbdd6475f4c339237173b9a4d6854891a39e490e9310345719d89fdfc979. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:36Z), 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/USUYG1186238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504f16a747dd198a5c5575fbe2331c7942b635efa6cb89d73085cf528b6bf7f5. 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/USUYG1202870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823979f0ba8e8a12a8c9ddccea73c47a6d9146ee4a5d4ad840c45ecedac293f. 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/USUYG1206573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c075770cc1d440976f4fba91da9a25a6471a20d06b614fe46549ab81c711e1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USUYG1222305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d886c0347bbdb0ccbb812949f38cbd1726b144261460c5fe399367d4023bf. 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/USUYG1227681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c31b6f1485fe017800dbb5edceda9fb00c9593f0c760c8ff66616b478b174e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:25Z), 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/QZDA81998793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3f800a7aea86cd4c50fb1affd4bb9b96d5a4e3c3afc2adfe34dbc9661d99fb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM24S1911366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eca7463b0dda01834c0073f2d5577dc915e40d052fa6b4351bccd11b8d9a6f. 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/TCAEH1957103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f90f1006102a9bb0c1c06b4c3e08e72abb4e05a06e621f1d74ddf9d0ff9fbf1. 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/QZHNA1959251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aee69d360f69c7d3e9cb1b842c1c5a592bbf601504557299b88cbd3c06440c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM24S2001740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa545ef42c46d636430a594ee59fc618ca003e207bbbe0acf134d0605a6944f9b. 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/QZFZ62036091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54392dc154d3b53f30770c2a95f56874c11535e626558e85c99550ac4a6ef702. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:02:05Z), 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/QM24S2100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919ad4e4201caca0fa87a4a017b44636abc9dc6cb3aacf4df7886dc51c0e0cdb. 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/QM24S2101022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc99165acae2894b8cad94834646e81f954857136bed267baa8314082023539. 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/QZK6L2197808.