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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6175c1d8f30abadbf180fdcfc5188386663c539edea69cb65c8d7a94860743. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa669fc9-6fd9-4e14-a3de-dccb659ccbfe.json and https://artists.proofprofile.net/proofs/artist/fa669fc9-6fd9-4e14-a3de-dccb659ccbfe.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83eb55ebb732295f9d5f82f2b40ea4543b2fc5d29a18771ee2907ebbdbc84af. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZGLS1905921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa017958660e4689799b90ffb45bc47af6ee87a409309d850cbcacf5fa7b8e579. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:18Z), 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/QZGLM1995911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090c7b7de34e4ff3309c580dcf47763f3ef669555464fef1ad2518b8d0e92bf. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHZ31925738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91094f78139070e6e420c1867e817a0e81a00e9d2f900adca531a500e9592683. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ61915109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462f8780a6f1285dd080a4c155bebe07d9ea80ab610cfb33f21c0e9f1d733b13. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/US7VG2082434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2dfa2d0dae9a189dadf8a79fbe3bbcf1358f10908361b37320677c27224579. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:48:42Z), 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/US7VG2082435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01278e7b403fa3135a93f77c6ab81054977795fb525b50bfd8bd08fba9f8acf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJY2015051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089bb0fcde53c0327eb8263595f13286b5b20f287bd67895bb669b716d3a7567. 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/ARIXB2106820.
El Sur Es Hardcore (La Venganza de los Mc's, Pt. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93fc02d979264f90a2d907e25869a4b943f13e82bdd03c5237ba2eaacc226df. 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/QZNJV2357905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0149651dd8d6346a103ec4a33465f51aa7089ccd96d69d54701c06e11593b399. 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/TCADN1888512.