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 0xa573d8467ecbe07404498c78ba575eac65c343aa621e9d2a0348c60475013712. 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/2c210a66-28b1-4396-a919-924b393ac6e8.json and https://artists.proofprofile.net/proofs/artist/2c210a66-28b1-4396-a919-924b393ac6e8.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 0x5b8d52274d06e00318519816081de917a6cb1e65126e7ba9d2bcacb6bc085080. 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/BCHTZ2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba0241235274f5e58e9e684b1ebeabdaee32dc5cf8dc7897fe20400335a93f6. 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/BRIOQ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd54486bd1433b3b81ca868eb4aebb7be693e8d39c4383b5f1f0814a3dae03. 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/BXIV82240730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9309fc6b8deb24158ddb0d5e36653ebfc0056d42e89ebf95b548ed003d6e555. 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/BXIV82268969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4474f6842a67862c741625a9cbd3a734acd3331dba0f8be92fa1e43f1bb983ea. 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/BXIV82216305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05456ba5607632ccd3f93fbd7b8b757cbf6bdf84e5da8d0ba2f1046ce476c7af. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXIV82258398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028fa7cb3aedbc10b4f4a157662272607894f8924cf475e21cf55552bbd6b98e. 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/BXIV82229855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a2e3df753ef09f95cf7ec24deff02c398274d85c6c919ec9f6441d43f3d0e4. 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/BXIV82241554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f37d17f3e9069748a9c000bd84def9f7c4a67ad51619da4684bfcb00e5456c. 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/BRSME2200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78017a18597ab2da22a40575625aad89fc826e27e587d5e5ad94713b4e7b16d2. 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/BC46V2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ad062c6655d520e42165e65d77a9878a78c88ce16f0fa8156347567ca51b2. 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/BXIV82315101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f67e73e2e4aa727ce9e4a2663f6afdfce9adf53345ab913efc0aa62c6e5ec7. 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/BX7O92400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ac57a88dfde73f6bf2dc6875f26095634fb6007fe4917acbd0b1586d14d6dc. 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/BX7O92400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ac57a88dfde73f6bf2dc6875f26095634fb6007fe4917acbd0b1586d14d6dc. 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/BX7O92400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070d6bc2de0e1448a43a7ff472bebebbff0fdc001f0963c03eff5cc6d4e4d297. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BRSME2202204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf1d7768fb4611ea15f3bb471f18f2eae6241a40acacc5144b5c7336b340a9b. 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/BRSME2202205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1808bc1b7a6f6fc41cedebd267fd39cd8c5a4a559b8c6bb94879c7193a72d59. 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/BRSME2202207.
Legaliza Esse Verdinho (feat. Dj Isaac 22)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de2e25342e8f10a367d41a409b2116773c2572086f41c8f1532e7bc56805182. 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/BRSME2202208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bb521e2149a94aed893ded5c8f304648374de27af4ee71b6db6f4b189dd321. 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/BRSME2202209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba0241235274f5e58e9e684b1ebeabdaee32dc5cf8dc7897fe20400335a93f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRIOQ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd2accec1e903bdcf61947475284d7fdd38e26d31f082d1f300e85cb2eb126e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCM9A2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d29ba84c8f3a9fa4ae9fae0cd427123475408050816d1fa70a6482d1af5a4. 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/BKM2L2500088.