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 0x0a737df19662c72e286df2651e977b5843b96d2bf12a42d0a0da9e525cdb86d4. 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/361672f6-1871-40ee-9485-187ab3590646.json and https://artists.proofprofile.net/proofs/artist/361672f6-1871-40ee-9485-187ab3590646.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 0x59953eec9f2072331e3fa7cc67329739807ec7a108262dff93fda304fffb1131. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/PTEN11700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf45bad5a5ce84f005cc53687b7d34dfaa952175e09157a7794289e2ff36bd86. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PTEN11600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fde473a0deab3fb11092ee6cd89ed8a9105991de756fa11cc121b86f8ad4b0a. 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/PTEN11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7858aef992da5a71f0b1840ae051274dac58369ffe8bfda387a4da0c71765590. 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/PTEN11800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f21b6ce5463dd77f04984aed0b75a12511ca6f20612868bc19bade4fdc2367. 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/PTEN11900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b6859f194d373030406c3653942017533944414f2d3bba6d4c3b99dadc48a1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/PTEN12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dd51f6e1bb59d1090246ba6c3899281de97ee251af9b7abe6bb5c64389e560. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PTEN12000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb4ea4b5aa3d6773f8aac3077b09cb1cb976c2eced6e3a8ebcc844b4fd38aa0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PTEN11900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad7488e0680e9dd4a5401c75718fed7516bb9f6c533c5eb2159a045ddf09957. 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/PTEN12000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f06a608eaa1f478e541965c7532196dc0d3bc1857207d5724cb495887e8eab. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PTEN12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fe1499ebea9f91d74534f0b231c7986fc99c98a49bc51fbc8557fc408d9c99. 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/DEG932405323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039fdba6110ab5252970b211bec42cdd16985b982b2056e9fa75f8db7a6cd8ee. 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/DEG932405325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9b861a89faef2c676192f2282958cdfee3eaac3043e285b3d4b798b85b532e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEG932405327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039fdba6110ab5252970b211bec42cdd16985b982b2056e9fa75f8db7a6cd8ee. 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/DEG932405325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0164df7b658beffbef6a03cae9611f4a30d7b1f2f3ba3fb45e34060ea5e0332. 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/CA5091900507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedbc627d48aab6cdbc958d8e8c3be24309ba126bb862777b5587cf653dfbb0d. 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/PTEN11900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814465b549dcfe11c56ff271fbd1c15a0b1727a0cc07780284f6477a7f3d204. 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/PTEN11900020.
Branko Presents: Enchufada Na Zona Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3181085e7e879bf4817ae4f225e104be17bd436fa0425e34d1a6ae1fd7487d9e. 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/PTEN12000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b6859f194d373030406c3653942017533944414f2d3bba6d4c3b99dadc48a1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/PTEN12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59953eec9f2072331e3fa7cc67329739807ec7a108262dff93fda304fffb1131. 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/PTEN11700011.
Paraíso (feat. Sotomayor & Pedro da Linha) - Pedro Da Linha Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259bf244d987427da2249748f6d8aa7d646bc420f7d884ff8eb6ca639162334c. 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/PT4HQ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9a6681258c73ac17617eec9e936ca11903805e93266afa4e25a5c0d3a26fcd. 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/FR2W61700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634c8440372b0bca6a60f6fa61dd5d4a0df023e638a8cfc2a5cd43695cbf7bfd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BE6F52200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc2252ab40c57bf1bbefb1983ee4b5ec7f7d2c37a1a2b0846a24d4f23b9fb5b. 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/PTUM72200122.