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 0xea26baa11c26964b62f497f232c69fb249394b1859a0b90acb47b492f1d87976. 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/bfc1c345-18ee-4b18-952f-b5cd2a55447d.json and https://artists.proofprofile.net/proofs/artist/bfc1c345-18ee-4b18-952f-b5cd2a55447d.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 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 0x269ec4f8a60a06c798b69264ffbbdabf9e0dcf5a51effef6fdf236552ff26ed6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/USJ3V1334629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50447f0a8694dcd160a7e11341f83005e529bd56dcdf295c62b8881a5e308594. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/USJ3V1334632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb149379ef499386dd1b343d48265f5f24cd0bd1b6df96ae9a64e7481630fd1. 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/USJ3V1334633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916c8885ad7f2b2fd76613ceab09f9fe100760ebccf56c3d39bd55b9bbca4cc6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USJ3V1334634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ddaea70d2c94218f569c90a2da200d071f04ad13708bc0df4199895f1e1fc2. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USJ3V1334635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39880491e4e64dc99a915cae8e5f4a0b232dcb8e302023492a7d34020a1eb7ba. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USJ3V1334832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe4ebede0029da657f1c46b1a1ebe9523061894eb8961dc2873ca88bb210e32. 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/TCABW1426092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b69dc5fc84cb30bee208c676d8199b48454aa617d72423247d53b9811ba3bc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCACC1441627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3caaf095a199cba94fc5fe6c29129f9dea6feab6e601b8529990a48e35ea68. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCACC1441628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da6331fb9fb0ba7271466bf43a6a7ccdd62e4e6ed73c7788b8230148fa8b5d1. 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/TCACC1441629.
Šťastnou Cestu (feat. Supa & Martin Madej)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0472b1d34ee5f6da7c12a85718997b775f3e5bb6222dfa97dcab3f75dbc755. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCACC1441632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25557a34c859b2999e233892245f37f191ae807b6d197b1383e7830b34de383c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCACC1441633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebdd480c58359eaa722a86d466ea5d92c2c85de58553646bf684243f10ee993. 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/TCACC1441634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf490d90c7b77601d7e815c07cb7ab9c84a525301577ee962c316232ab859d4f5. 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/TCACC1441636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37f6abab0d8653f57ff6003cc7c94a47bb5a8f3fefe86a1e98dfeb286e00ff7. 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/TCACC1441637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccfb8322f83c3802dd6c14ad73af9ab67a0d89fed2c28ba404c1a94ce026a18. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USJ3V1329415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a71232ec78bba2ea5abb314e043a1d485619f1f5ccf3c9ee142e1155053d9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USJ3V2025272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015272fe8a3cc146132ae00f200ea65b8336e83e6ceefa83c4295f3776f3fe23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USJ3V2026051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d503798684e6d956efd5b181bb06aa98810b4f9e114b40e59970a96a623a7d. 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/USJ3V1329376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4215f96ad95f437ed7805b021d33714146a99afaeb54f51ed320e721964a01. 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/CZH110900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fbe4a0e14f683e5ee8c6f0e941724cdd3d59a30419332d2d6f17fe4a37112d. 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/CZH110900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8525dabf42c79efb75d62d781e4d75da6e308deec7a540c35700ce1d231f15. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZYFZ2327819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2457aa31d4424d800cb903af9e73080f9c225125b491e26f74af60f7efca28. 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/USJ3V1329275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7f2579261e23f9c8009b8160dcbb373a4fb57a54c2066086a2d91ebdfe6b7f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USJ3V1329276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c5dfecf87df9f19c49bfa4140669f9ab9455f4c0faf18f522e8af5e44dcd99. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USJ3V1329277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ad036352c95387969a07f49c4c39b1bfdd6ed8ce105727fb3368b3310134bb. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USJ3V1329278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf1d6fccb0f0f560bc04a4322da42c66985addcb3533687e0b37e38ec39bd47. 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/USJ3V1329279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f749c628f5d9bb0b6a502667f7800911b134084ff0bc6698d504f566b4183f. 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/USJ3V1329280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9940a2a79b9e9bf1c0a9b2b6f9dd860c6307ed8b767bcbbbbd12e56fed99886c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USJ3V1329281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6696b855b5fafe0543a0849bdf961871bc584032cdce588889a1cd63bc09caaa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USJ3V1329282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b069bb8669e30c802a3c243d7c161c35bbc288c748e05d75b0639bad303a62a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USJ3V1329231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b6c7e5cc9aea7d6de1a17144b4d012aeb5ae1358fd73206cc3d7f965634c34. 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/USJ3V1329330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d117b27f05710f45a1840847d7343e6fdd0b6bb25559f2734e8429281da9d4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CZBX82400026.