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 0x3b7e0cab447e7ffbb1f1fda8ed7947aead6e230cc61dae472c90669a008d7dee. 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/c556af47-ad0e-48a2-8c64-5030f758c4be.json and https://artists.proofprofile.net/proofs/artist/c556af47-ad0e-48a2-8c64-5030f758c4be.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 0xd65d55079f8c2665a50427900a960e6950613984a5ddcbc60cc27b811307458e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKXN22113732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891b954f23474e7d3f7a637bde106384d27c47112edb6469655f5bb8fd8b320a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/UKXN22113744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d52aff424c56f5922f8c29050bca95025f81010591f3e6d214f28e4c2234d71. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKXN22113763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe71eee43035c948514f2194cdf1f20210f1a6d1013bf1da1d01bf98139d86e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22113770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34781c12f9dedf6982a6d881006bb0193386b1ddf43162da3f74172a2853ae3c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKXN22113791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c15be849aaa8a7f5f122ddb1b688f241898cf5ed35a85f3675a6cc54487f2. 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/UKXN22113800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda035487c7954157675a894dae91b97734fad4e4d2dfec9fe217c30c5ea1b22e. 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/UKXN22113804.
Canto Tradicional Francés a La Naturaleza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe56d704af34d2808995a711ac6621d257fc4c24ef7389b9ae024dcfca0273b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22113808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ce48c6dea5ddc0b0b7b42f0f195d968fd96ae4e9893fb4268e2074153f8c1. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/UKXN22113821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a711de88de4785a10bd5656c6494d7680653b21be54c78f7b9dcd978f312a5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/UKXN22113828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967674f21c7acb64bd46fc421b54c4a67f6054313a53e1ab264bc6f0a3e9cf47. 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/UKXN22337318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967674f21c7acb64bd46fc421b54c4a67f6054313a53e1ab264bc6f0a3e9cf47. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKXN22337318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff2b5f86a2a19ee247cdf4491d749280d052c9fe4358b35db5a612a65005716. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBMA22347322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff20fc0c88625e75e7642b940ec04cff0ae8e814951d7ea23cf6a72ed082b02. 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/GBMA22347321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd43d65e6bbe0d120085d8a8ca97d597fabbb4fe01450c51b6af8bbbec25c2bc. 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/GBMA22347320.