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 0x5d447c003882439f297e61aa0b1c096ec01360fa347dc68f3552cbd3072d6acd. 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/f84b6dba-f980-4f5a-89df-0a1991a7a727.json and https://artists.proofprofile.net/proofs/artist/f84b6dba-f980-4f5a-89df-0a1991a7a727.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 0x0273c287cacf3bf5a2d8369731a3067ebecb7bc71e2feb143c4e0d3315dbce65. 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/BREMI0300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39ede2320bf34580dbc9d3fe97d4aa506be9e9c9daf8749554d5f368c708756. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BREMI0300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5d9990e993cb3e38db3a50e770ad30459f6a162176f0e6b220208e1fed9646. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/BREMI0300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd85e3f59984ad7da199aead6ed815d978e8f9a98b36da514d530f3b6fad827. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BREMI0500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c90b5a951111bfd1fc9c2464ef34334a64a369633f9582f1fc1612b53a6c87. 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/BREMI0500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529e282e32df383fd3eebdaabf997b1b509452e84dc4cffd5e33de291b1d9f45. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/BR4VE1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9fc93c88b18d6342274b5ddc30f673191795fbf1beffd16327fd415312adea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BR4VE1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba23fe3ab2b877ca9919728d88977f77a0b25f9e98b114aa18298e40198983d. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/BREI41400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a769de610a848a5e970c19bcc022a464a303bd94540684caf61d76393e43734. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BR6IT1500012.
Carimbô / Sinha Pureza / Carimbó do Macaco - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c9d51a039705a1a377ba5243113cc2ca912912db65061935fc096a6f791b85. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BR6IT1500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98587a06a18e5501426db52b8978c602c3be401aff477b6bdc92251adb88b4ba. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/BREI41600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4919a6c123ad5531ad5dd848edaa985acaa9bafcb8df464a9ba112d0b5ab38c9. 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/BREI41600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598c60321d7f4434a54d1fe19dfc1f7870272aaf59fda6063520f885d8c04270. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BREI41800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bde02ce327919a73c4cf9e004c66ed6f0569ca11bf314eb9984d5b1bf17da0. 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/BRPBP2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd8e7d408b6eeeb9b5cd9d1d48c387f932f0d81a942cda83484f78373614a08. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/BRPBP2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8983bda7f58c5eb9b13e838098487039e89f2b1b18f401883272077a33d216b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BREI42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a3b365b699f909b45da683a9e565d8f0f8030fa0e2ceea52e49e4c57a9eb50. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/BRD8X2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668b37bff0f943299a77ccbbea6b763793871c461ba2a88a892867a0089cdbfa. 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/BRSME1500762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14684dc39f6caf2836f80956e8be34715c2dad40b14147a71895e953e626d08. 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/BREI41400001.