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 0x3d1ecd72734f9758e84a091fca2acb211e9a3744ba46d320b8bcf025b9aec7be. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37c56f7c-c364-4bb3-be80-b67235452d7d.json and https://artists.proofprofile.net/proofs/artist/37c56f7c-c364-4bb3-be80-b67235452d7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1° Festival Xetruá Lavizala (Bônus Ebook)
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 0x34ca66e9968f77d4e99472218121ad073fc46552aa076b51472dc8dc09a8985c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:40Z), 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/QZNJZ2339226.
Festival Xetruá Lavizala (Xetu Mahamba Xetu) [Ao Vivo]
Mata Cheirava Pó Caboclo de Pena - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0cb1455a9bd813737934916b8bd5f3c85569bb5d6aaf653bf3b4b6cf63f419. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHZ32100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff5a97b0894fdc3292fa3dd8c8a67d32c4c0317fa9593b65a31577b38e4b847. 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/QZHZ32100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579cc73d9582e3f3c06d6d0e082caddb5eb96e57a6468b5cae2d5bc752f6f18f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:58:57Z), 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/QZHZ32100454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa363acd5e426ae01789f3cf58009603fab44a394901b38039db9af84e1ee08. 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/QZHZ32100458.
Venha Ver a Força Que a Jurema Tem - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03ff2e4ea6a3424fdc29a1ac2c3b58478558b3fb03c3437ea13ad3f3aa078d9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHZ32100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd596a336cb16ac2862f96216c1b4e127ef1c5fa0a5e52d8e37525f0e19d94587. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHZ32100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ecf0d8dba9bd83762956adea75add1bddccb2b1bf1796e987ca15eca02e0cc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHZ32100468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d33ff67f174ad74264923f3e7a5ed9baeee9e04ddf3613e06a06a0f87f625. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHZ32100469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1010dcf0bb282abc909e9556811ea2f1ba29f47bae8b50dddff4427355ad8cc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHZ32100492.
2º Festival Xetruá Lavizala - Kuxonga Kua Menha (O Ciclo das Águas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b99ed1ece85dd91aa9f93db6d34091735f8c0bbe0e6575e08437489c77ab16e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJX2348297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4c5cbe27395147ad04a5a26f396ee0da934f9a01fa495563e97638103df3b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2348304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ed1c4d55f31eb5f4e49f31b007a97e08db4982745901142986c068df352ae. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJX2348298.
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 0xd55cba7f07f1b835a65f3283bff05de26587e9bd84140c660beac8bc4942a167. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNJX2348299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fa7e62182d6e3a6ca02ee4c010b97713d5948b3c00791893eb8cfb6a82afa8. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNJX2348300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3827568cd88c9306d49b787ada23dfc8e9ae134852fabcf54321c459a623f0. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJX2348301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859099ca36fabdbc87486e763f59987e81fd25b24576df88ff82cae3850c988e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNJX2348302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52970883cd3adf39d7be7344b6610edf235cad2f0f9391de21fcc5a4421a5116. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNJX2348303.