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 0x00c6320458b334d527d9da12aa6483bdff4cad359d1b8574c8fc0bafa8a0ac1a. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebde2c1b-735e-4e6b-8784-1ba402bb221d.json and https://artists.proofprofile.net/proofs/artist/ebde2c1b-735e-4e6b-8784-1ba402bb221d.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 0xefc88882bce12c661572d7ffadcfedff369478ebf9273af908342738da05e2e2. 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/QZMZ92153863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135bdb35fdf520ee7afaf40ea14fb8632b2a4ae731cd86188cc8e15ff0f42ee1. 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/QZMZ92153864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa110fa13c2febf03b413e378a18917f990a93c711503b0f98f887d0456003898. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMZ92153866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f99d7e08a2f0a39b803b27c2df39569cb1e72c94f6c54dc9956d41166c8c512. 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/QZMZ92153869.
Que Gusto de Volverte a Ver / Amor Libre / Carita de Angel / El Sirenito / Mi Tinajita / El Testamento / ¿Cómo Será la Mujer? / Mi Matamoros Querido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6021fb12010f2a0ddc2d814365ff7070a1c7d6369316591687e28ad3d17bc9d. 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/QZMZ92161547.
Mi Ritmito/La Sirena/Me Volviste a Engañar/Carta de Recuerdo/Rosa Valencia/La Calandria /Noche de Cumbia/Pajarillo Montañero/Pajaro Chogüi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfd9986f0898ac497d42e332eacbe17ca476c59a11ce7ae5077686d19bfa6a1. 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/QZMZ92161555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515335586c3bfb76aca7eacdcf7a5a2dac1b257e1149d35ea3fd0634af32cab. 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/QZMZ92153572.
Festival Guarare/La Yerbita/La Gorra No Se Me Cae/El Vampiro/La Burrita/La Manzana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229cf4800798a809fb3f60f62f4822d3dcc726873b6b6dbf1de153f758ad942b. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/QZMZ92153574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8aacff4f2669bd693aad500c36aea0087678f5b2bde3691c96ece924d94235. 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/QZMZ92102689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208692f58df170f1dd8e8c18318724e6761526cb8c4bf8ec5929edd70fa0414e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZMZ92102691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cfa5aa81149185263a191bf82d99070573453a366ea20726c1468981194561. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZMZ92102692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a577f43335173e5d3487370507ad6c35ec8906a564037073d18d3c41c214069. 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/QZMZ92102693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd3b0b0dba91a523d684c31f0bb91cbe535781f0acf8b490514eaccc53a4fb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMZ92102694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38203308fe2a53a68d84dd9434c249265737093f5847c4463af386aa6b78910. 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/QZMZ92102696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1e470566c53910c509709969782f57ee6582d2eb943e9cb201c470939c31b. 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/QZMZ92102697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2f4df0dc2a7bbe794e17266ac787d4343d2a22491012461486f87091179dfe. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZMZ92102699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8392220d50d317acbd9ac9e127c840252a4f3fb15442db5a6114fdde89b424. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMZ92102700.