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 0x833c298a230951737d7301e8fbfa9ec79eadbc231a127ab131e97eb6c56dd023. 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/f213d5a9-ab35-4b68-9178-71a3ed98c26f.json and https://artists.proofprofile.net/proofs/artist/f213d5a9-ab35-4b68-9178-71a3ed98c26f.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 0x6875abecb54392c37bfbc752eac2ba8ce110de00355733bea78152ea672e5305. 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/ES64E2201327.
Flamenco en el Berlín 5 (Mira Mi Música)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9f1d00f2ec5b558b81dd1aa36b63fb0db2e857bbc5f3958943f4e233d7fee. 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/ES64E2200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f058e88abcadda2859a6522cf385dc502869f9e637711d92ce063e8850b291. 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/QZHZ62259653.
Flamenco en el Berlín 9 (Mira Mi Música)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f077654057f31559cef7c91923623652bc8901bc71050b936bd410128172f9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES64E2203399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11718e71abbe6ebb57b58ee150ba16ca9e591626164e15cd1b5d8df86e579414. 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/ES64E2203396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa948b5626d8966808a5b5b8affe9e008c0c4f6773e42f0e0941b1602658ddc8f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES64E2203398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7eb81afad678c82577062be4b0e81688c366fcbcb0fa0af20bd33ac9bbf126. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES64E2200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd179138718e74aacc1d73ba5c123fe65fe95447d4f7e3c32e5b5efdaef49c9f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES64E2203406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f701c975aeb59d0f7326ca77cf1a3ab11e0d6e1b8e24d7e9b33e68c2fea8ea. 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/ES64E2203539.
Dos Siglos (feat. Juan Jose Suarez "Paquete") - Soleá
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da39685c65de004cf09a7978a20eea0aca5248fa5c539b0d82e22bf568e14a. 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/QMFME1496897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178a80efaf08b93c8e174f17d5b9b62bdd7b4023f491b72143ca42e3adc3601a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES64E2201987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b549af4329469aedf933f343d8e5b6f34e8e8f69c4ce637a7e5e793b8aa0e69. 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/ES64E2202097.