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 0xf74f8063c34a66d7c665add359cfe7f5f253b8970b24ccf7c0a68ba3541b44ed. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c680ec29-492c-426a-9007-15d26bcf827c.json and https://artists.proofprofile.net/proofs/artist/c680ec29-492c-426a-9007-15d26bcf827c.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 0xad370b4790e6ac47570a3149c21b512ad7829d8635c3abe783f88a11bdf7e31b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MXF601500465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f370c377f217728c9c37143efe2ea45526f3db237b6829e44fd7517b04015d. 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/MXF601500474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc5e7a6d99e143433774cc6f0ee3e1ba8a8bc665346b69d9364fd3b2e556299. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/MXF602000376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb839d58fc8fd96f6d852d567183118c7597854c41a46ea5bc79d86fa69d9d6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES7861500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d9bf4df3f8f924188fd832f423e18df76590b37deabf9b04d7ad070a5930de. 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/ES7861500115.
Líneas Estratégicas (Un Tributo Hecho en México a Daniel Melero)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd1499d34600e95fb900a25849aed8913c96aed4d374a0f26061943701929b. 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/ARL4J2301889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57faf76b4fdb460f4d67e66a41da511bf84aa41ec224f5f2f0458ca1cf6de8a8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARL4J2301890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b7afa0dbc5ee1f22b77bfe7c593a6d135c12ef323c16427317d3429e32f3fd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARL4J2301891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c660eadd7aa0793036018f5014ba2fce765781c55f44983d6ce6c4e802ebd53. 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/ARL4J2301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4eb0fa08f444ea35850c1594ee952004e666ea1281ebb0507a6e6011c5c104. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ARL4J2301893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade6fdadd2f85130146be236523ab8b2977b06ca120bbbb23641026fccc5763. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARL4J2301894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829091966a7fcd06cc4375016a5c6ab27e6058490150a420e5cd123cc14868ac. 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/ARL4J2301897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a19074ebbb122ede878941fc0a409d3afe43db43ff818134312eea77d778ca7. 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/ARL4J2301913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018fb3847dc46b42100002f971847e638e7a26063aa33f22e06a0952754e5411. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ARL4J2301914.