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 0xdc50e7802ae2646d775a31f0e4800a1a906c4730f4c6f77b0beb0078d48efa1f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91f39478-376c-497e-a0b6-db1ea1452925.json and https://artists.proofprofile.net/proofs/artist/91f39478-376c-497e-a0b6-db1ea1452925.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 0xf796d55fa4ddc806609439130e8774e486f26d1ab0d7fb07fb689b8e95b0cf88. 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/USHM81982120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e2041393c810b909a8993f4ec63db85aeca5d20ab70344069dcd40576f85ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMAAK2264029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0268d98db77bc679d0c066e0d62688ead377d59f598fee568be1ffcbbcbb28a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMAAK2264030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5966060e23e28689bf1177afce494e1c7c2c50a5fbf9c53e1633e2348571f90. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QMAAK2264032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e6cacc76a34e785c1ab8d91ec400fa503142fb3d3c9b849fe12d37c6ae6185. 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/QMAAK2264035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d00404f16193ee8afce5b2001a52cb1ae7759e1b6d2025f0cc558ee7ce955. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMAAK2264037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02310ee570a85627327a2625997dea43db2d55d7c51b781e2517d88e5811887b. 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/QMAAK2264040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ea3bb7dcf6f6799225c201846d067a36f9c9b4e19c2e37dfcfde847aa33dc. 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/QMAAK2264041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a88f57299ac30c1de0516aa4ae19f465adacf9de4ff097adb0cb6b6c744918. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMAAK2264031.
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 0x6c14eaf12d9549ba580297ad821e79f2052e68949f660917a91ffbe4d3e9a94c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMAAK2264033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e5bb6a6553fda90c314661ba06e11e3b24b1d53905256c6070f759d4d9464f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QMAAK2264034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eec7d2a28f5bc4f240faaf00c8c76662e3589bbbe5c299ad434d97014d81d0. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMAAK2264036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb6670bcca7a24ee3df6d0f740c590819172ee2d4982e68f60795f3dd184c86. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMAAK2264038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7915d1fbfee80c11d1def0f91d57a07b6b2150cd0710fcd08612bbb35b5125e0. 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/QMAAK2264039.
Nazareno: III. Guaracha y Mambo (Arr. Gonzalo Grau)
NAZARENO! Bernstein, Stravinsky, Golijov
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e66f4bf1d602fdbaad473536d8ed9b6f675c2bff35314c9a71c01bbc778e39. 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/GBDGQ2233603.
Nazareno: V. Tormenta y Quitiplá (Arr. Gonzalo Grau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c0c8b2b2fc99ec3f2c20485410e9fe0d5c44a5b58b67e760c17d74ba3c4af. 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/GBDGQ2233605.
Nazareno: I. Berimbau (Arr. Gonzalo Grau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe2d572a801c53a254556bd103cd54608867b17a17a53f7b8438435b6c960e3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBDGQ2233601.
Nazareno: II. Tambor en blanco y negro (Arr. Gonzalo Grau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e6edc0f357feae2c01545919448fef2f9179864d2f468af75447d243a8970. 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/GBDGQ2233602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17334791a55445f04b01452d9e5daa139fce1894457455f94e67f271241d49b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBDGQ2233604.
Nazareno: VI. Procesión (Arr. Gonzalo Grau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dad9ba7a4ec36afc5b507e517f1606250ab90b77e63824ad11fed623a3c25df. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBDGQ2233606.
West Side Story - Arr. for two pianos and percussions by Irwin Kostal: Cha Cha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4083bd81e37f99008f0d41ebbd6041c37fe79fe7979d47ef57b9746b855a486c. 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/ITP901100007.