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 0x5fefd294de77cfd957af2e4974af46b90f22cb3ed859a9af86b71bfe2e9487f1. 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/e935418c-a903-4e69-ac25-a1ba581e7b63.json and https://artists.proofprofile.net/proofs/artist/e935418c-a903-4e69-ac25-a1ba581e7b63.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 0xcdc9e8847a0236b192e7a294d8cf947bcde979d15dad4e5ec9758822fcf4e429. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRWMB0900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb74c86c7406b70b496c5a801e64380776000605ed81b32c8bba60ca6a0c2a2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRWMB0900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed66a0cb5924dc6cfccfbd029ac77edd9e48539c1f109ce79967a5be15e310e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRWMB0900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0244c3c877f36abb7c89b6ca540d47e87fc84f72bbfc1d71656f7a6894cb430. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRWMB0900244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce30796d7407a31dee561529dbd07c6be1bb442a1efa72b8ba1f9a45e5d0fa66. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BRWMB1100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52fca426d56b40d59fb3ba88f6ceb74a90ec9dfaba759217a6ee4982fb1d1c5. 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/BXFUU1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728998c2ca4ad5f16df115033170efbc0be104f8e46cd31d5a68b341b97d7a6b. 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/BR3441900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f5529a68e8d83d66dfbcddd24a2183bc663a045915848e72d9fd9dced340c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BR3441900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39151223028e0301abda8870e0d72296687448aeed483bf51ab2e03f14dc8564. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/BR3441900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88e47b039fd9f712bf010ece7c80f7cac16e68b27e582376f61e38326d86035. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/BR3441900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6056b89ea21a3fc706727113ac2d290106648117df4b1236856a15257de5cb. 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/BR3441900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3bf806ffe855bb4c2519167eee63a5501ece37677d37919b4726178a152f73. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BR3441900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ebb9a4d62b6a1168bffc5be31fd7f017d87a5b322f12e36bd62a1837ccf09. 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/BR3441900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c09603a3a83de2ec4a24d84ef8f1c7e11cc9937062806d8988edc681064421. 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/BR3441900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7e1b95e8553f3978365329d771b2c8806910e14178c77f2a86da29c6866257. 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/BR3441900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a610d520e9e3d3ec9e55bbac14ece634eec42aa29e683ed2275069c4da984. 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/BR3441900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b1393e6db9cbbca5d065397dee3cb42a1522e3861445456a5841e390abe98. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BR3441900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2088002d2cd29bf5dcad6a30bfde2a72e34df6b52cce83de5dda0c66e511eb. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BR3441900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c233741487a4d914b2852f0d549deb2c524b6c1704b408f22c27cf3396ceeb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR3441900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d44f2034a88777b01e63a59a45cf39e6db37fe6d42d4b4fc3fd2aedcc931ed9. 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/BR3441900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505d8cdcb086901d90c053e83bca4b1bc40993bd185451258f329d06a57559e2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BR3441900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb09c52d647e40bd85440fc4c187b60c4864c5f7a3117dd23098d4680ebc315e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BR3441900032.
Samba de Arerê / Coisinha do Pai / Vou Festejar - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab33a6f6fbb30300612a8547fb939ca359a0d630b5ebc435cc0ab77e8661e4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BR3441900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255ea235e130b16151dad60248ae6f4783a03485db1de223d69f4ca1314b61f9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BR3442100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720dedcad5943b213102c86ff4a8822cf07dc7ef4a0c48bad729d3cec80cae4c. 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/BXSP62400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839be03b00bfa75a3938d3c0af7f6ef9240aea35d462d5eb1ddb6e40eb179c05. 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/BRUKM1500026.