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 0x2e20d7b49a01fa45b3056f3c0cea4be8c81445fbe4fb2cd70ed612400cba83b0. 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/b176a6de-b74f-40e5-b6fc-cb4947f440eb.json and https://artists.proofprofile.net/proofs/artist/b176a6de-b74f-40e5-b6fc-cb4947f440eb.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 0x0f4ca0e29c2353a7c13fd82f52c4357ce7a37f28218511e9487430433490edc6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:09:11Z), 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/QZFYW2064595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc953eff41fe5bcfb4f47d8fb6a7064be386686d2dd06e5f93f484582dff754. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFYW2064597.
Gracias Club Libertad por 50 años de marinera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a303da4b77c7e24c27f5a2931db2be9526bd438ca5881932623ba50fd8742a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:29:27Z), 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/QZFYW2064601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2636119282d96a5727c60cff1e3161398f0c4444bdea289a8e6ecde3dc61a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ32265582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eddb7ac966b868c645aabd439e507b0a1d34f4901a25994be8ae58ed105342. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:34:32Z), 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/QZTAW2294253.
Maestra de Piel Canela (VERSIÓN ESPECIAL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293656363816d3667e5843733b2e434e3a8a28c408aab69e9facca29a596b2a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZMEM2466487.
Así Baila Mi Trujillana - Versión Cantada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc5667bb4ffddc4c043eceeb6ac53be5f056dd1c01ee268a6e6a703726c5d13. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEM2466488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e50404c2984fbf6e3ae36c3cb5e9acffd8a0321aa7f0303f2657f1ee240c09. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:40:08Z), 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/QZMEM2466490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6f1e0656648b94a7ffc20b76c68dd87d9adf62b47c157a60ae12a46f94646c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZMEM2466491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3760ac6b268f158d5cdbea9b5b526c4fb5b0125ea8b02ca69395e0e1e547ce9c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEM2466493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a3a146bd1e6787273554a5a2da840089cc0d16848c5020cddf9575568e17c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEM2466494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaaec4ef66aa7538b46d71dcec6ed43332f5c468b647eeb0b424a501e083370. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEM2466496.
Trujillo de mis Amores - Versión Cantada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab6bf49961522028cd780961c05403ce05ab99687d8309b231ba16c3d1a7f00. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEM2466497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e03f54faf51924752d9224aaae662ae95817af48117aba6a738df1489bb684. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2466498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9936c4150bd0ecfc2901ab7df81ab75735cecfca028dc957a3b5c5c4a32b9a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:23Z), 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/QT3EY2490585.