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 0xcb2b308738b62b25546f69b3f37503f1a2fc9ecc7b8e2b711d5837ed9d609ca6. 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/fe3ea35a-5293-4b8a-81f1-18f532af7bdb.json and https://artists.proofprofile.net/proofs/artist/fe3ea35a-5293-4b8a-81f1-18f532af7bdb.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 0x2047389d0987bf2bbe05373af63e25b9775a3a4cdc33a7f2d1b7aaf8ca2d2747. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZK6M2097767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eaaea9596d104728487c93dad315e2092b1269cfbb414e7b9ae83605f4e738. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWT2022083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6363262fbb653abf95712cf98eeb225862e764050645e97ec1d5287feedc810. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM92115449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7d1c00ea45d15a07c6a0f45d081bb24bdbb2fb55d00fb6dd4dbf0f395d4004. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6P2226411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20775a06ff16965e2c323bd724e3430d1b516aaf090ef95401e512b20f5382fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPLS2276724.
Por el Resto de Tu Vida (Bachata Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17338eec6025bde8c25a878d9b8d7a0e865716c076d44e4e2a471277653c883. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAHE2339222.
Si Antes Te Hubiera Conocido (Bachata Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d611f0efca58b3ddab59887b3c9b8dbb75ed6db6d1d2bcc9b21d6b1b565a6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWFS2448336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70758ea8edba254ec29af4767916cb5f426d22098ae2051ac3cc2ad99cc33f67. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDD2428960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda79ce38daf82a7fe95ea3e7de7179badbe63aa4dd91efafe9de8e6ea7c2ef0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWV32446061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e507aaedde9844793fed17afb795582711808e9421fb5902670ee28b4d33491. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBRKQ2472079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9bc11414ecb6ddac0bec808e01851cb609b88bbb813cb71fb0021ace14a815. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2289145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d28940e84c781f80bfa366df07c20429021a2293653f4f76c8c2bb8347fa61a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2474213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65000fe0e6c87c7128e981c7ab85d44e7c602ab05784c05580fa7f990c03e9f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2325349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f141469dbc46da1a8603ff6b51424169c5faed11681e382bcdd38c08813e1f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2249070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d5e283bc8d8329344ccad98e3cbefc1d40a3ecb02c425a2b240217a51a8ecb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92260266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9bc11414ecb6ddac0bec808e01851cb609b88bbb813cb71fb0021ace14a815. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGLS2289145.