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 0xf8465aa496fd6a574e1acf18d1ad18c7973997333bbc2acb947b803e14328703. 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/a7042d89-89d8-4c9a-b9dc-7b10a3b22e46.json and https://artists.proofprofile.net/proofs/artist/a7042d89-89d8-4c9a-b9dc-7b10a3b22e46.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 0xaa3080702de10404f5179289433f53234f0971d46ba20baabb6f243e14bbf37b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US4H30400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f61f2060a520b3f8b4e898d226b98c98f12aa0f5829f13eb7c7129cdf647cf5. 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/US4EM0610002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98a1d360136cc3f3843eb6fcb666a18655f6d7d29a74c956652a9606b6913bc. 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/US4EM0610006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e96d876d88b5621b44ed2b161bf86c921424aa15133d0589033a1cde5fd5692. 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/US4H30400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7d1a2141f4b16889978a89e5b935dcc487be46e64e853fecd0a2d8440e0492. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US4H30500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d8dc2241a2eb1d23c9e78fc32004337457c744347e44a7b4b88adbd44cc3ca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:16:54Z), 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/US4H30500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3b87473744a00fc766174f487a494f3ab7cadaaf0bd0ed986c0c539f0a4f2b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US4EM0710119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3e02bc61d2965df0d5bafa4c218088fd85f8ee789ef32b35c1db2914e2d0aa. 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/US4EM0710129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695a486af111efccf5e129a446715d9b52a05dda731560d6a99e5863ae6900e0. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:23:30Z), 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/US4H30700383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c12e27ecaa66f65b7493ecd9d9efeb6f4e0b4ac7b8f690030a9f766d0c79e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/US4H30700390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50b8ff532aa8265d3c3f7835aef1f9c9fa93d9e751554b23a34fa5f39a555e3. 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/US4H30700387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d0fdceea5170576ba241ec5fffbe58a0bb527f71f4fce59d9c3d0c06aa0dbd. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:53:08Z), 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/US4H30700388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf914d562bc75a66c5829da4f11ce6117566b1c4a23333607525a6754d0b13a1c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USTC50880877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa56fc811e892dcc64964c8d87ca31f4990dd658b1d72f8a8b4a79752d5650ae. 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/USTC50881058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0d5e9d641e21bd365bd6bd829bbdaded4ee1b82c897548206ee6a2d3cbd051. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCABA1158408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b144bb19288783e14e18f755c25d852f6fd24fbadc72042fdf92bb6697b9182. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAFM2170690.
Puro Party (Remix) (feat. C-Kan) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fdacc197231a7058f13ea0238b73d0fdb40297276024d13fbc0922ac043efe. 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/USUYG1069546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7047b5bb1beac7499e73960e49506f82a6dfdffa170cb8d9992427f3bcb1ff. 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/USUYG1230413.
Masacuata (feat. Eithan The Talent) [Wepa Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78c7ffbafaf2a5edb6bb98fb08f03e1853c5c73bfd47be614a7a58fdca6c839. 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/QZGUT1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ffe4611eeb22258fe7c777ecf4875bd5a177abba05e7145d37642b304add94. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZGUT1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c6aa09191dce733e4c3e2f15d391fbf6c0d6e7964bae6abd337a63267ee71. 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/USASN1601756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6afd74b8211b39dce0deb26113bb7b7049474710bfb062c74b9d51f316fe68. 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/USUYG1080229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09ff95857e22a6880bea7a2becf0ce869b46f66c7cdd557cdb531d12836686e. 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/USUYG1080231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10602731e14d9585e1cd443d8b4ab93970e54a1fa7069f3475401eac2e112fd. 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/USUYG1080235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a55a20eedd01e60001dcec353fe32bf26726d2e5eb94ec5317b4c76fdc09ee. 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/USUYG1049571.