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 0x9bea138e12a1361cc0b37cee62a9fdf146362ac28ca064a4441f47c13f55f04c. 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/f4e30202-9656-4ab4-9fc0-4e3aad07ea48.json and https://artists.proofprofile.net/proofs/artist/f4e30202-9656-4ab4-9fc0-4e3aad07ea48.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 0xaf6d71fa251fef13256eb7099c32736592139edd11e16202bd3f07e3799f662b. 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/QZNJY2335810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2733d5203a0540e33130ea44cde64d907629e9fbffebe444b061b4b3f17e1592. 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/BKGJS2300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0837d0668c6e1da8fd65e7ab2149a0f608b81911fd97d2517b85f3f65cc237. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ESA112561728.
Que Profissão Foda (feat. Mano Beto, Vantui & Deyvinho PL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5cd266c2da82b89fca564311134e310bc39b5ad25fd063dfd360e65027392d. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/ESA112456196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83308d923071dc88e8b42a4d8cf0c24ac3d017f8f846f46a070b108b1a5bcfb7. 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/ESA112456194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62d8c9b55230613339cc867cd10fc247834359412abf4263b7f6d408d8bae87. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZGLM2589611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0d5c1695a3db72eb2b79394a15e316b26d111ed8c44ea8a580092690c36f5c. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ESA112572570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad26fc6f91e2451589e220a2d783d2621b204bac99c74e48ec7ce923c500033. 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/QZGLM2524330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc1561ee8d4535c4d673bb5c00413c38ee4d80ca76b9bdb3b9a83ab62f74be3. 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/QZW9K2443054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2c787da67cf3272e88bb3f591eb4e9441e027440120a6a848adca3fb5216e3. 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/BCAP02300954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e2e7e9de9e2b40106432a68a5c1e93ff27ecc40c2a0d7531d02015798c732. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US7VG2218330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb34c4fec9b86901f0b6c90edd7b6bcc06e6d81c2f864997521534db1270db. 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/US7VG2286948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36013f8ff5bf806ef6ef90af376037dbc78f4fd610789e596f85bcb2149a272b. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BKGJS2300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1e2065dc54002be12a8196862f3ed66427d35ffe5575cd0e1647a7ca6720a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZW9L2407554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c1e28c41af0fb93446e2eb3e4f7857e00da63733558a5a30d4ccaf305c2916. 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/QZ5AB2469045.