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 0xc83693a1a565b7aabb84a5341384f873932bdfe066dc9513a89e1928c49d3497. 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/8af595d5-f0ad-4c91-a2ea-93ffd6605dc4.json and https://artists.proofprofile.net/proofs/artist/8af595d5-f0ad-4c91-a2ea-93ffd6605dc4.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 0xa31cd1cb8accf878d636f0843af4e14ce8f68a622d8ffb951590044c4944bf6d. 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/QZNJW2341825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4131d653aa97c68fd5ecb0f2fb2fa374bbbfd07bf9608604dd491844c00652db. 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/QZTVM2290362.
Rap Chileno el Sur Es Hardcore Godlevel Enfermos del Rap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2f6d22821d3c416a900dc231a712447797b67dd0b18b8a1109e7ee1b3b837d. 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/TCACH1535412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a25ab797323d987c8143fa02d21ec06aa5e74ce56325bbd888c14076e5fa109. 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/TCAEY2045240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2b9447ab8cf4044fe22242925e393c58326e9d50e3f92aa1f5847395d6d34a. 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/QZHZ42287142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3cd7e4eb26dd3e0d83410f8f44db89e67ec7d170b40cc2aed66e82a4ba0990. 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/QZTVM2298159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce044556fd7a32b41f2c014b1646a247c7b055440e528a58cc471fea13c72b9. 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/TCACK1556357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a8da8571afccdddf86d7d5be0fc635f94df1b70d7ff005151dd9e9c72c894. 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/CLZB22100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7da5f6520d545252d6e0e2d0190aed405a72c76e6d6133c659f302c95e0d24c. 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/TCAFA2011620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca60706883c5ee5a885268a333e2fdfdaea3bae1775a08f83d93bcef6ec40c15. 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/USL4Q2001387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88cff114f4e61eb7e8f015d9b25c406e5ed3bfbd1d471d4edabf6623e68dc2. 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/USCGJ2099080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88cff114f4e61eb7e8f015d9b25c406e5ed3bfbd1d471d4edabf6623e68dc2. 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/USCGJ2099080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f98b10ac750467fa55dc62a84815c29680af0546e0e29762c5c652b8099125f. 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/TCAEZ2010649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02917475063411a32ffe1d4713f4623f099d4766c6faf7f4ff1b80b202d59f8f. 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/QZGLS2419559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd019d3e57c3b95e9f3664b05151ff030ab214a970e7166fec497ee359c060282. 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/QZHZ62183113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df840701d6e0e9153a2ccd858f57a3539466f2de14175dbf4468e8d25abb46a. 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/USA2P2311111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1e14cb42cf2b021ef37710fcd09d360c170d01bee7bdd7308bc59d44743e23. 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/CLEM42101013.