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 0xf68d5a7fa75f292c83fed38f294e3f8ba82dd15d96691e5542ce8172fd283b5f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55a23ae1-4a95-40a3-91d0-dfefaadb5a4c.json and https://artists.proofprofile.net/proofs/artist/55a23ae1-4a95-40a3-91d0-dfefaadb5a4c.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 0xeefec43e4f874c6df8797b97c4683cf40da3ad97c47fda2e18abc5d9f16bb9bb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHZ62069888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919c2a6b55470e51b4e88ab3e457d429cd87605609f3cd759f0559c00c03609b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZNJX2090506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49e34ade15949bc020de8c97ff23f046b4ecc21bd38a7f13ef3274af3eb956. 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/QZNJX2090509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3e6a08d3c42d6e8c5f27261fff2b81b30fa5c70a7abd37bb84e79e539057bf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJX2090607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a270c030ad3e25d2924eb494334bf7918911354643b36b97bbd63c3659a9359. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARTWQ1600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ef4bdbca309602bb7d810eb4bbbaa05e0a417edaec28e66d78d0f45b1bdbb1. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/ARTWQ1600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab78f6d6046ad8bb0bdddd01a2c815a598e02809f0477bf334b08087c4b438c7. 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/QZ22B1870852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e72cc78ad6d1c3fdd37e2a91ade71265968d41f2ba89fbd716ea8a8a377c08. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZ22B1870853.
Poquito a poco/ Llamaré a tu puerta/ Dame cariño Niña/ Solo con decirte guapa (Enganchados)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9542856f0782d943bcb4c51e0a3e6a1984ab46d4cf3949015aa6a5643e2aa389. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ22B1870857.
Noche Con Arte - Búscate Un Hombre Que Te Quiera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b4caa014229eb531f5ef44ecf3b7e3524751444418c83bdb9ea14be6821ee1. 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/QZ22B1870861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed80828b0ed9a56bd58950fe7b349bbdfd12000c81108bc907815d8201f1553. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZ22B1870851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a18f3b8aeaa0fafe36ce833fa4085b7a91a92f129133a67f3914242a96292f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZTB92339419.