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 0x520631864a9360df8c3d5a93c51de61c7003e3b64ae883ab5850d17d38d14769. 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/f17213e4-d784-4a31-9843-05f4ce799f65.json and https://artists.proofprofile.net/proofs/artist/f17213e4-d784-4a31-9843-05f4ce799f65.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 0x3bfbc4ea45c584b22f3e0ec5ab641093561e0aaf87c94df9f975ebddbb597be2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBBGL1103488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc64360b4f791f2be627a76c6596887ae74ba387bf282a4be3ca02e6e3b08b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBBGL1103491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c2867dd726b55cbe2f0be6148fe56cbf0e173b1cd08445edbae4a4f8d0796d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBBGL1103492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cb13996e1f40ed7811b5f509767fa478ee8ff6bc07daea11dc8b44f75c0d2a. 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/GBBGL1103493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d65a27622717ee23dc946d9b4fbfefcc4f75bbb56ec35936d452cfb1025912. 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/GBBGL1103494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4429f176fd6ea5bb389a6bccaa2c30895165e53b0a6097e37949799377c9d. 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/GBBGL1103495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b45f1fde3ca74770d48de0956c521ee97a5fde8cd511123716bc14a3c2b17b5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBBGL1103496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0eb8a3255f8dbad977187f8bbb4cb1aa88e7a2da55396e307c9c5d3a7f3ab0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GBBGL1103497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0076041374564504ac24c3ef1a3e22253f85e95b588b8a9d4fe0fd0612668610. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GBBGL1103499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fe5269277a65d04969de6e867a3b080abc7e664358b17632b5002cb0ae2e16. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBBGL1103500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2291179a17685d6f468e594a81b92f178ae23b4f99a301ff4001b5901093cbf6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBBGL1103501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a3298ad0a8dd020036737d9e0e75fe77c5eaf053a0985b315357d91c95c5d8. 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/GBBGL1103502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb9f1027f80981d7929e582f116e90937f0e44931833bc82fe34f465e7ec30b. 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/GBBGL1103503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb7257a7d7c6c2a6392992d53d6f141fb418c6fefe6f80e55626e2b926803ba. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBBGL1704451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc5e8166d900c12ff67aef4e32f0cfdc620e9171c07c21de21346953d096fe. 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/DEB632303144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e6daa2b150b73fc88ba69205e9ef62c5bdedfce3d167bc67c40fe8c8c57561. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEB632305255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4248b8429f561890f5f82730b732330f2e12046a5abf3914a72fe5c3b9df3811. 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/DEB632305264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddfb69d082275abe8abd02ff3db1c2885201cd76cbe7e8e9e08ddf89e384040. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEB632305273.