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 0x5f2ff5220404d75fda7da57ff54ebf3c16335577a6e0275faa87eb2ad60430b2. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf62b689-8f83-4aa1-82e8-26063f71ebb0.json and https://artists.proofprofile.net/proofs/artist/cf62b689-8f83-4aa1-82e8-26063f71ebb0.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 0x9c6da13eeab3cd4cfc0effd990c4aaca5432e5684d933f581353d20945129b52. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/SEAGA8703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19b8cdd40c2f91bbf5d601f440eadd0b65e1a83210ddcd832a1453ea08f2d93. 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/SEAGA8703020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4920bd5f4eb1b31f14952bf0c7efbecef09ba60ee08a88a32f779841cdca403. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEAGA8703030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a15d152ea43d668dc918703b435cb9710f64bd522d3a5f58079c7c718b29e1. 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/SEAGA8703040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00a9c1756d4e4e3935e0089ecd5becff816bd682daa738d1c09d447c954d34d. 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/SEAGA8703050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b8f9d7f16e0198f7d70cdd6f79ca11b00006459cd628d29f801b6384fe0dca. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/SEAGA8703060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc94c2e1de71d4cfb76cea0a7c18f278ff7cb099d6f8de34581cfb91e53eb2. 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/SEAGA8703070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386191be8451bd103487ec98f645ec84cc180f3a0b77aa8be2e39e8126cf49d8. 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/SEAGA8703080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f845ebd24b3383119adfb4e57f3ecd6e54f92d79de788c2d64c0312beda5148. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/SEAGA8703090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584b106a2680a0852b0fe5e0d29d3c8a75f4404169d0e2329eb1c6e776eb4ca. 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/SEAGA8703100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb6d01da787230e45b3399e396259a41c56a1125bb7fe45999e743eeb35ae8b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/SEAGA8703110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a3f4d765f5e1ad50c3e1d4bdb75032362777b0e2be1e18ba5358a6ff4b479. 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/SEAGA8703120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b45616b2cc58ad03c60fbd7b5625f4500bb7c7ebbc1858c59d50740ac3d95b2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SEAGA8703130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be3b2c7d02df30ca5e7090ad338dbf4b3fb6073c650dd74d1a71047fbcec9ef. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEAGA8703140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf563d12d75405b7e94600cce5bca1fa493915734971aac52e293f93e105bc543. 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/SEAGA8703150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6c06783316dbfd3c7dbe41764158804c16c4b9456f835a0f0c9526294de105. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEAGA8703160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ad739c82138fd2b5f141f50590c44f36512e575eed7e2f5cf2eed184dfc133. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/SEAGA8703170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6adf74048d298037f563dfa30629d0bb9f9b6389b3e0019f73e2d6072907ad2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAGA8703180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c366e033747d2d4aa71a4ea8a47ac5e9af97bdfd606e37fdf7ee1eed665285. 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/SEAGA8703190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8effe2a6c35ede1526d895d3c208b5f080a1ffcb064a347dab8d1b0c48294e68. 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/SEAGA8703200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0fd239295acc7ab044af6f6e8dfb6decb30dce23be19d5f106027533987815. 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/SEAGA8703210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd9224f75551ea0865c2fa3b7a64e557ffa5ab47a5c81c7def42e5fbf141f7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAGA8703220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ff829d2ff5f02569242574ee3c4c770a5074f0ffcb1c7bd48a1f0b354bf713. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEAGA8703230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d31c58740394fe569053593afa3b392fb98c35108123c37f2b4a186dcf68bf. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEAGA8703240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5784157dec1863119efa32ec0a36f27dad228507900ce2e5038e470538c00f65. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SEAGA8703250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc7eca19d4f0a8ba49722ebd10013a60c27090083accd8568bae785dcb222e1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEAGA8703260.