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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda61753162793907a59517bc90e8fa409c80792641b07612d112a4b0ec3af866. 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/c7c09035-dd87-4901-b0a0-ed0ab2767099.json and https://artists.proofprofile.net/proofs/artist/c7c09035-dd87-4901-b0a0-ed0ab2767099.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bbd5d5e6b41d40b9071010c87c27fe0eed3a666fac57e6d7c46fbdeaec73b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G1922155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a1627ea32a57d25dd9604fde70697d66cebc5354d721ef5ae690e45c373327. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ES71G1922148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb692a30093cee0110378835e2163318857ef3a6677f342a547284ab57d7239. 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/ES71G1922146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5663a90ca95ec359a6b37e767aab9f028a888044ceba4dce13f412ae3df8e094. 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/ES71G1922147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa465f751a45d322b9582c0aeca6be2be7cc2a931776ad77aafd85e67e2c40d1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES71G1922149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fa107ea3018d26b64d1d98f25bf920f84e95e499c0efa6d8fb79a0d68135c2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1922144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5fdd0a87f36b6ab7c94139920b879486ec539dad11d6ba399ae6bf2e2a9697. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G1922152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d78bf4b36f63ff6db42fcbf3399e0e2a7242a07d8b593ee8067d5033419c2c. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ES71G1922151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edd98e912de1f11037c2a01e86d9169fc56f17e283c0403e6ddcc74d1c0f38f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G1922154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af1936be94a16ca533a975fcca1db4eced1246c080a8c7ca1133199a17c4eb8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G1922153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57ec5d582d80ce5cd990590baa33315029a981fc693fdd37c25c22babf6f8e5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES71G2210618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4062b54eef58bbfd9f8b3c295b986cf6ee9e79095e57e589d691849478fe78f5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G2235700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876277769ce540e799e4aeb31257ef53ed17ea12f69da3e6c234b3bcd3346bf3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G2235703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8ad8eebdd7c8b4062fef8f231f251d4ed8f5ae8f57c18484b774b0d2e8b47e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ES71G2235704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac588e7c80ed836db875be683e1ebe8043b8eeb8cfcf35ec5d3e16a3fbd62ba. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:30:17Z), 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/ES71G2235705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea2aa1612bca22bfad72b44b7a5515be8c9956964fd1d587f22e2e0d20c51fa. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/ES71G2235701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce9df31bbd864ffd3c6b32fb653573fa2aa955d47ae7e32710a35a917c322f2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES71G2235702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c805c80256e6a500224e34af260a7985ebe0e23d4b0b0c963935cbedf85b2a. 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/ES71G2337831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c809306b3422d8a41b663a3dec95813810284cc53012df14e3fff462a82f374. 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/ES71G2337832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe239c8aae64fafe1a8d50513ced00de116de953128753289c42ddec254dd2250. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/ES71G2337833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d63f300c9fa64493a12f9862874d154a39a25d11127cd39f384e55098fb5bf. 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/ES71G2415250.
Campesina: Ay soledad / Guajirito - Larga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce13cf331377242ce40121c5d5f3312a477b128a006ea79a769afcf91b44a5d. 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/ES71G2415251.
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