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 0xdbfdcb508990727188e3b5f61cb1a42b772b69f0037813f219db39f1070a344d. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ee0ba96-7cf1-4eb5-b2b9-986933236ed4.json and https://artists.proofprofile.net/proofs/artist/1ee0ba96-7cf1-4eb5-b2b9-986933236ed4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Obras para Piano: Bach, Chopin, Ravel, Guastavino, Golijov, Ginastera
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 0x349d2dd7f3f0016fa57bb9eccf743b5da309eb2f75dd60f06fedbbcd76c07f39. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZK6P1969939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf2290ec6b2de0b367a5a12135ef583c29146ce6f522d291524771eae31ca4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZK6P1969942.
Suite de Danzas Criollas, Op. 15: II. Allegro rustico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4f2c57a5ab786cd3e961bbf9d8ebd085fa6a7d6ae3d218927526e0f21eec35. 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/QZK6P1969944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1565a4eba588edd05fc1e542c2666f590c039be00c330a38c0ff7053de069136. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/USX9P2038010.
Londres Suena a Serú, Vol. 1: Tributo a Serú Girán
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad65dbae186e738228b7913b278b500426bb84c96e37b3214ed4847757408f1. 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/QZMER2006694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b11c85b4ad3ea40bfaf3920b1c808cdbaf69eed26a428583da2c0ba68712b64. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/USX9P2038011.
Londres Suena a Serú, vol. 2: Tributo a Serú Girán
Canción de Dos por Tres / Ojos de Videotape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54707b824c1b3e86787367898601d8dda5a9e18cd11c6766d18b93c94896a775. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ARHXW2005141.