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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d59652e059d7de5647f3d632b5adde4014db618fdbfe33f38fe5040befefacc. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ec1c09b-81c1-4862-ae9f-93fb49291e03.json and https://artists.proofprofile.net/proofs/artist/2ec1c09b-81c1-4862-ae9f-93fb49291e03.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Italy (Italian Voices Sing in the Charming Style of the 20's, 30's and 40's)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c14df17ee3fe923c979e371f3135222177fde4f0e1d9a8872437cb772d297a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM161603714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdc6d1f06ef44e7ecfb277ef30af6ad839251ac41039c4dfab5f2c05d9eb637. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM161603716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec8cc7756953781c26b3800a771b05dc1a050bd4c860d176455a7c73a71f786. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITM161603717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5389f114122849742c92339c961313c7a3447c569704cc6550f65c6328bb1b. 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/ITM161603677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b2953959e425867f550a12199f837d2f7ba8a11765aef66c7e4abeea101b7c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ITM161603681.
Per sempre nel tuo cuore - Female Voice Sweet Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5538e142395797325328c88b4d13beaad60c7633f558f11450f11cbe70a2e20b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ITM161603682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262379357ae30794d1ed2ac69040857b638ba40d9d20061b5add5f6474093b9. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ITM161603719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2e80cc9a822486adb31598130bd038969b6b5df066eb2abbd799852c0c619c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ITM161603721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeefcbc7c2db3587febe0c712745f845955c6130ddac3e58a333fabeee124615. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM161603723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326ec88080ffc4ddfbeef7d5638bf9e3bd665a0594b282647afa1c9adbbc022a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITM161603696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd8b2bde140a5eaab5e62383a39bc2044722fea1ceccedce13c4d254b6dab54. 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/ITM161603701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48414965566339b73c796e94446e22289f036b187b673f473a20ec44199a4d0c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITM161603706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cf4cc9f17aa74ac5bc8495a2e65af932c124f34fd7e56c59510fdd639d6ac5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM161603711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd29627b4e4b5492613f066b478ca31f1010cd93f39fece69eaf1898083c65b0. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/ITM161704745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9307abb1648bb9151141b85e061f5861bbc7a37fc112d748f179424304240d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM161704748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f6367a448e71fe575f82500ce2ad37c00a47353a353039f87f0d06308e8223. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM161704751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dfc9cf1d1cd8fd138c0ca8a1b6a5d5b7374915dbce895ea2b888748e295969. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITM161704753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34458ec076ab4938e1fa65a3fff2fa6b818fef922fd8f924e5529e42fd8c4015. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ITM161704756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc0d0a63ba67f9e61fe3cbaea80a8200fc8e9ce1360ddf91187ee52a90f7f2f. 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/ITM161704758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92df132eed3670b61ff08965b4a2473b5f4376654b232eb36c5f406044d1f628. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITM161704760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dc112fda3fc6209df54428ffde2908dfd1135c81ada06f84f6c8e2ebb8f24d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ITM161704762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3a74dd8ba57b6368cdbdb57a370e41874fd63597073a1bb69f028bd2f4469b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITM161704765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323e570cdcb04555dd83d9fa458297335ab761129555cee3383cc092e430ab5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITM161704767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d749f4b8a1a585f267d0ba87ffe6eda974761e522311c09a12ae4b3bf33aa5. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/ITM161704769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9b1d69c83a52923b0a6701c63dee59c7b6e2b137ebe226add7364fdebdcd1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITM162313815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaf3c19614c21bc9f6942fdd748ae8235f4fb8623797eb5cd12b4bec14f86d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITM162313817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746664a00098e9e13a8ca589fcf94f6242ff0044551fea6fad2968cb632fd5bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITM162313819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85528b35358cf6474ab1eceb07cdc42653c8daf5bb4b1b0e4038a9cdfd51c61. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITM162313821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf8edade5e7f00dc126688dabfe5308e2f4022092e95de941b7750de3ae3753. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITM162313823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76c23a03e8a59979add798d43d0ad54ec1145ca3d64a37bc2dc5cb125b28868. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITM162313825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83effd33c6ac70744502e14f2315bb529626eade8567cf71f761ffb280e937df. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITM162313827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5533976c9bee71c4e7d2ef5022c8192696fe95b7cc6d34371c12f6364379453a. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITM162313829.