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 0xcb02308325ad39d2676840227becb9410874845cf3fdea6d8412f9230ca4ae82. 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/c402d889-db60-4efb-abcc-37148c2acb61.json and https://artists.proofprofile.net/proofs/artist/c402d889-db60-4efb-abcc-37148c2acb61.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 0x22c90b447461366838f9a7dacfc19d2edd7174126fb8f8a6f7f70a7a95ea9787. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USHM21892745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fe70b7e36be643e93451390c87d3e4c24a0a29cd459219c1fcc1262dce6b2f. 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/ES50A1900653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac5a89bfdf28ccaf4cb78d4db8a3f2efaeb22630e9fea213e60377b76a9f795. 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/USCGJ2147218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8e2a5603385d5979695709f2147d482ae8bc32d2fd1564d8d0aa0d2a33b18a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ES50A2200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b61c3a2174dd1c7694b54069c07a5efe58a523ce270fe3d2976916a60d94066. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES50A2200713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44fdb5dc8b52c0600791529c51a14d103f0ef9d5aea708fa36a3e9f8ce4953f. 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/ES50A2200913.
Quevedo: Bzrp Music Sessions, Vol. 52 (Mambo Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbe1cb4c11fd6e7daaa8b96612c2fcb08ace2e24935def041225df4aee88b9b. 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/ES50A2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40089524a9dcae508882f16c83acdc077d598da777cfd3cee41b4fd6bf585df. 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/USCGJ2358728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc451478c744cf8f3ab270644cfed0b32f1c30a8b8eeeeccaedc3680718166452. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES82478034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a50fc10fc39318ce88bfd0d13da29bedf7e2b27a7ea1a99938216ac63ecca25. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZMEM2479410.
Felicidades Asere (Cumpleaños Feliz Cubaton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaf4d7b8935db8fbf2ce4f28850b25f57c1b154c210552363b529de17191ed8. 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/ES50A1900527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f4c77aacafaea035c2b929cb13611a73b8a04c393ca95a398e456f97f80c3. 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/ES50A1900535.