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 0x36bddd6b5b4f368936e1cffef81ab07fd97d51d5f85adeb580a1e7bda366fc64. 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/5568562f-2a81-467a-bd2d-e34116cc4b09.json and https://artists.proofprofile.net/proofs/artist/5568562f-2a81-467a-bd2d-e34116cc4b09.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 0x6682e24fb969f794f268b67772655a3fb6e3efa9ea634dba4fa692d49b887919. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZWDD2481323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1539c286d9c72e0ed623c65275d7fde03bb41eb3245007e48a903629001519a0. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXIV82456813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fafca17e7713836e08e7fe80f543f06f3f3370bf3b1638bae9ec8b3541ce91. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWV32410275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf487acf62c4359649176360f060f8244182ab5bebf896c0ef0b78512b5bc12. 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/QZWV32410270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02cbc1b91797a271d9f7dff12f12a841cc927c76295a6ecd4111518f3861b0b. 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/QZWDE2406844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ebd65ee29db32eb32337e7e983235c63e2556ab29a808c2d4ba94ef5dfb07. 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/QZWDE2406579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9bd4065ff8f66e66f28fbb91deee81a93f135958e58e7ba931f79d85e2d011. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZWDD2481229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc8ed9b005baccaf8a55d6cc348b72bfcb510cbeee5ad1a729b5c38c97c4732. 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/QZTRX2407984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e18f8f09677aa7c273e7af751cdc99cd3ef97a4ab81a7ac872c1b66b1207a66. 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/QZK6K2458448.
Aquecimento Digamos Que Sou o Chefe 002 (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed2c79d12c5f629ac1d16c90d4a50844aee8d5ccb6a3a49ab7f89152c50e519. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCA2A2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224fb3c0239d21edf33f754e4e0c5698acf60f4e65804f675546a1fa3577b443. 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/BCA2A2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62223815def00f874d88f0fd69abc73816c714b1d2080afae01fbab10e9d336. 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/BCA2A2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407dbd494735a939ed7b289e64f1f2c84f228a809828f24921a61fd538e54dac. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/US7VG2443581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8e06dac294a162724e43b31d6947be429741d4f08a965f8ae9e6ff8963a5ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22302689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf15a60bd5d79135711776a400d8105a63d1f3fd975322e606a471de37aaead. 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/QZW9K2350222.
AQUECIMENTO - DIGAMOS QUE EU SOU O CHEFE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85878a3312375670ba10846632a71b8a796da43a7cf792ebf908cdc7cea20c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTBA2314778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf6ca4d02639ddc9ad3fb69859d2374aeeefe635617ab60ae279c7f55692070. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNJY2364585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d88f3f53e7eb2524bf96c501fb55f2c7e7a7da908503490dabd87e5ef8780. 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/QZNJY2387847.
EU SEI SER DJ - NO PIQUE DO CHEFINHO 002
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0b5b082b78b9165b6aff06efc5b254653ac98eaf7f07a64fab38f475bfd0d. 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/BX4IU2336010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537331ae569c7749c1a72fa9fcd66a76a56c2458f4ba34689dc9a68b2db5dcac. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCA2A2300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce17e50eecd7fd3e830df0bb3d3cbe5a972ff6104ba86f56cd0a00c18284f74. 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/BCA2A2300166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97be8abf0f7273808445798bd5c726c2fdc7e8cc2815c0a632e2dd3d581338f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BCA2A2300170.