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 0xba3b0c4c01df984171c79831838b5f02175fc4f9d0e448509e0e0a6957e530e5. 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/9a676713-accc-4eba-bf2f-7394d9ca0053.json and https://artists.proofprofile.net/proofs/artist/9a676713-accc-4eba-bf2f-7394d9ca0053.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 0x7ecac98e85c2f0acddd3cd895d29b2ff1ffa49b166c0b79e8a22fb9e27764893. 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/QMFME2293157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c2d2ea6a3df54736cb8d910d293a95ed96418317c30135216d97ad88e57a7d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/US7VG1809525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fa31cfe512a60f013c427898c7f1622c0f0e779544d3b48cb357877293fa55. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:17Z), 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/QZ5AB1929611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb298a43adff87c5fe9bdb3241c9e927479fd200b9409209fbd422b72f28388c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/VEA2E1900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea2a3a589d0866339bf85d95f78ab5eaa9fc546470c8b77407a4380ca315ad. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:18Z), 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/VEA2E2000060.
Mandarina (feat. Willie DeVille, Tayko & Veztalone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccdb86b5f14eedbc0042ccd04f8cb17142951984753cb98a37fa40eb63c3015. 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/ZZOPM2221968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79a9660f5c094ea364402a4788199989a595699840391935b95405e66bdf806. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:42Z), 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/BK4DA2209407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98584456ef29f84a92166a273b3bb36f654e6e41d7df1e10b72ca9ac1bc8eac. 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/QMFMF2233679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ae17cc4ab7267fd3b237f0cfcd8c6b5452de470cc80b6d97d9eeee8e987d1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:49:14Z), 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/QM4TW2328988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc729ef9597096b027282a2c62b75dc3d41d02c44ab433905e5837f2b1eb4f. 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/QM4TX2386143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4113b7fc7b518124148f39c2fd7bf9655b01982788f088d48a32b1eb1c48c1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:42Z), 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/QM4TW2390079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156ae17cc4ab7267fd3b237f0cfcd8c6b5452de470cc80b6d97d9eeee8e987d1. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TW2328988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614aaae3584200ee225d18b405a78ffacb5aee28d7a51f240573ea59a9555c84. 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/QZ5FN2466342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416311e0e3d04db4829a0330d446e0bd1bcd8985d0684650d828022a2deade88. 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/QZWDE2431460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0bdf289df1ff857ee364e22770d339ee59510b6ea082113ac61315b4b9f9d9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZWDE2431470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b0e7e9b0e9cb1491073b73bd8922a47b5bc14e2f51d5295c384ef6c7b97b2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWV32442099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13afeeb06e1d0012d35f4c2598abf1cadf69c8c5258f85431bfa886e5a44a5a3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZZ8B2468642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f7af9aa4534c21b678eb9eb2af18f19b37051519a1848bf6ad0571e2e7639f. 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/QZWV32554955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586859128a70afd766b73cd7c307c2321db951db302fe8b7d332bb4d0fa9e5e9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:18Z), 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/QZWV32554912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94a680ebd4cd0a1bd7ae190ff92999332bef58b28d45ce6d459305f4c45cbf5. 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/US7VG2353473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3d683b290b2368055d603e41c50db4e011a9129da9ab73bcda5401e669450. 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/US7VG2353481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3e1a1b56e1ef2fe051cf08bf848013646c8ccb28130c7f976aa254f3d98d97. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9K2271028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6806436ef923357386e112c56644ba21a8dee3a0b4556a43084a714e0eefdce. 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/QZWV32451912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda01a1ccc2a4037e757a5964a38db0414ab9cab7807a558466bc3a1be99c65de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHZ52244287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1114899f0451833bd7a2f1170e73a6849548795ee0c11e285c2b6fe3e137c2c4. 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/BK4DA2205352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614aaae3584200ee225d18b405a78ffacb5aee28d7a51f240573ea59a9555c84. 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/QZ5FN2466342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded9603c03638501a812a5440a3028b9baae4dc8a455a841a67a844602a6aa6. 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/QM6MZ2498917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc7f9d299b48d4ca309df0c7773127dd9f822afe118a66c3c75e73e16d4cba9. 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/QZWV32445218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608afdc8b6faf037c94498916827fafb82f1fa550e7cfc36b69563e339c0ec8c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWV32445228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc385eef1da975c2719c165cc0ef20557e062abd5c8440770c150c55e5ab759. 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/QZWDD2447478.