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 0xf3aff3eebced5d7564869cd0f08c53895d1b2c6d5224caaac834896669ab49e3. 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/69c33f1b-d063-4100-bf11-0ab814b8c51a.json and https://artists.proofprofile.net/proofs/artist/69c33f1b-d063-4100-bf11-0ab814b8c51a.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 0xcbd4b3b7943d53e4ed6edb8ff4977a6bce2410b2ee10c739acd7262d10b08f86. 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/ARTWQ1500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a553f56ba2c480ce74eab1c07520753ae123eed1adb1cbb8371573fa2df38c7. 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/ARTWQ1500507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a45fa73f278c7353a13eec654a114e0fe8a0806e97b5c8be6121f88c687337e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/ARTWQ1500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1798e47d8754f74205f444f819a192b9d353ca3f5e1c122ef9cc16a3f0bf34d. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ARTWQ1500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef4e7bbd1766bd62144351c369b73e6019fe372cb9475b3f33c132e8bd52da3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARTWQ1500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec73f206cca53ef90797e390111e5b559258488dce4bb26710280a959f6704df. 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/ARTWQ1500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b415174f122386685c22bedf0fede4f842f631ac055f821121ccab0b8a09b1. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ARTWQ1500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6343c7da6beaf60dde07e9e67612297bb564aaeab5cfcae09fc7469aeab51980. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARTWQ1500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7712daf3afa827b914ffd5589500cdf884373db0d96012fbfdf029d984a43b9a. 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/ARTWQ1500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8f2fe2a72e16762626be60f7e924281a8229bef4fcd6abba8ff478e5c2641. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARTWQ1500516.
A FESTA DO ALEMÃO - FRIDA (PELADOS EM SANTOS)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20080386700e480a6bee742fcd828b8c1b23723f8a631fe446944ea6e55ab128. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/BRUSA7800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3be22b04da701506279e4bb9a8765b14279b0e835b0fb9f7d002e336363fb6. 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/BRUSA0400863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6a3aae386e314328129a8eef8dfbe7f5c37420895c827b33750ed49e43e0b3. 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/BRUSA0400862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e5815809bf7ab891ccbfc5e707c257a9e660df23a5da57a919892ebcc4a86d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRUSA0400864.
A Festa do Alemão / Frida (Pelados em Santos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b24f7baefc4237aa5eb7de7aed0b9f38fe4f6dea76e404c93436acb677f580a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BRUSA0500429.