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 0x0428fd7ad47bea0d7360a1725e69bf129d25a075fbafb2a76f1d270636825d07. 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/717ded8f-5970-4774-b8ae-7905351d7f19.json and https://artists.proofprofile.net/proofs/artist/717ded8f-5970-4774-b8ae-7905351d7f19.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 0x49ff8075e6c206ef86f49da1a1256876ec1a742444feed408d3f38370ee7c90a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:20:16Z), 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/ITR310800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591d586ce0bbd7264d0912a110413537a9af378193a44d8cbad88b41b3444cff. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ITR310800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3abf27a76aa71a24b7516baff9fc689f6c794134ba534dcd7c08983c7b4a749. 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/ITR310800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee73ee6ab6b0dd81731479d322c8acfe71126afe1398238b5926df14d21448. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ITI831300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7049f30db15f5c753750a02dd266bc4d1f177252171ac81c424a94b685f32d4b. 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/ITI831300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f626edaff3535e8f56c90a2c530a37db1e3a6b8a99249ae8fef0206ae95f48e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ITI831300021.
Qui Nem Giló (Saudade) (feat. Arto Lindsay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee73ee6ab6b0dd81731479d322c8acfe71126afe1398238b5926df14d21448. 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/ITI831300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ed9b123bf935fa8fe917f9e37d8947f3733286e0f5d66e0f0db7705760e635. 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/ITKZ91500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e349fff03c4702d34119189dc7edc65d2eb48c161d521f04ace7761a97431c7. 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/ITKZ91500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf529dc56d366ede059358ae7e3d8dc81e0e1b07b8b1f2e61a8611286e7d77781. 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/ITKZ91500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ea2beef4de1537371fc4ef20f162ee02356bd560160b7c44283287fe31c912. 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/ITKZ91500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d0832f8e106f7ac1b8e21cab79ed8daf6a5e694e7e51bdcd5c33aa11c5405f. 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/ITKZ91500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c49ae03dfaac162d30ed568ce50aa36e1ebfe5896b24353ca72a89b7345299c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITUM71701019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfb984ef8c0077a29976c3b6740ae232d2db9d489c434b45ec3ce03905b7434. 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/ITUM71701023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2d13850ed3586f7ee43c93690983bebcdd97344c57f9efca4c0429d3b968e8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:52Z), 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/ITUM71701025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb546b33f1fd7649b3bfd90d53fd5293b300c669efd62675c1bc09744d2ca4a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:57Z), 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/ITUM71701026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e5edea955f56fb429aa7ce5b5fcab7cc9da1200401d8a48b807ca8a7f1ceea. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/ITUM71900314.
Ipanema (feat. Malika Ayane & Carlinhos Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0537d9c231013236b9ac97d220825ca177817f6872db3fed86e71ea56c283ea. 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/ITUM71900682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b76dc4eddcfb4f84f29d6749cb30db02097ae831ce076e7d1104551042d0f38. 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/ITUM71901213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8488186db1a61a9de3feb552b85fa63aff473da0bedf0ed412325b9cbb781076. 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/ITUM72000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ee85fb415c1ff41181578d90634f91b4f705dcd5e0cbe7bcd06d3d98a3ba3e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:45:03Z), 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/ITUM72000735.
Fammi Scrollare (feat. Willie Peyote & Emicida)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d2d20f8eb45efde206ee5973707f189f3dbf299d83687a3d1d30dc676d6267. 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/ITUM72100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49e8f00abeac8acd7dc1e79d5dac127c987934e5ab26ffbd9d7091d5c530938. 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/ITUM72100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ee85fb415c1ff41181578d90634f91b4f705dcd5e0cbe7bcd06d3d98a3ba3e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITUM72000735.
Vieni a dormire da me - Chorinho Version / Bonus Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07980d1e78941bf1b715e2004cf9b165be0405aa23eb14a4bd1f3d9f99cd1220. 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/ITUM72100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be656ce856490a8bf284931a10d2e2c5ef609280c8f0edcc6942c9872d923b9. 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/ITQUK2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58be7094a4320b8770433a332c398c616d8257d506333b35d294d178cf860f27. 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/ITQUK2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc26a1f32b5f4810d2272b6f04fe40e81c67e7d5173269927ae4a3dd1c4d9778. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ITQUK2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c97c1e00febf549e66896a9c3c7e37333e615718f1d31b995944c7958e547a2. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ITQUK2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e33f1776b5f38e34efb9151366f37a67e41ca2771964589d6bb1fb31665064. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ITQUK2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6479323f16bf9b4e738f004bd5fe69d6167122d067f54a773e72b4865fbfc1ae. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ITQUK2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014d3ca83edde502bec18cb43b7b2f8586453c960a30075fb08cf2c60df66102. 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/ITO0P1400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc1019bd4d096dfe47d6b566a64110e00f89908f51a0cacec8550bdbf9f62a0. 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/ITT742100013.
Amalia Fado (feat. Vanessa Da Mata & Selton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ba07298df0642d67c292ad4f4810ec2112ce2f2ca8b90a0ed6b5637ce7f5e2. 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/ITB001800537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210d52279e57cd00cb969f3dde7f0a06d2ac95379f4385ddb9de6bdf844f284b. 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/ITB002100983.