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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b2ff9f67385e762d6a80208044f317b3e36b641d7c96bb23428e826d48fa40. 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/4481227d-e82c-4cd2-ae57-eb798a21b92a.json and https://artists.proofprofile.net/proofs/artist/4481227d-e82c-4cd2-ae57-eb798a21b92a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7801643601fc4b61c67ee766778ac8f7d7ecab2101ce27743989deaa0247fa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DELJ82027191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9d10e67e1cae35f98fb34f5d5bf1c3b80a42bd53fb322fab946ffb649b472. 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/QZK6M2160118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63b35a5bd79f28e681a2d3fce39df7514c6ccc1dea848eb4042ee1c118ff7a9. 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/DEZC62133294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5185b1a9170049997a2fc36e82dec9a0d5938a5d3dc17baa643d6202a253982c. 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/DEZC62285595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0355acc8efde716a3dd00049471af8bed71e0537951f5a4a597f5b2bbdcf4a39. 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/DEZC62285596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce26aa084c160b94ff6bc6f54aeb1f91752f234b525064ee53ada4c75329504. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZC62285600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff01c2d7f3fd708433024ebe45507bc9ea2871e12fc65cc0391e30f5e1634964. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62212731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5d636c773dc4d439d119d8b4ba99b99872847173cb6510f2cf2902faf007b9. 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/QZDA62394093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8268a53f839f24dd7dd16f0f76ca1b8359bc9082f3731db9989d221dd7418b9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:34Z), 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/DEZC62387055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ea56c50e652ed49e0d5a281348418eb5cfdabf7c0f4918673d1c57a20384bb. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/DEZC62387056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00285c97bf08a701802524b35e4db6dbef564594fcb7a534d58027c2b9fa3a50. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEZC62387057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff817bba5d35396462a512e8aef7bd686c249b06a69a8ba82642473d866148. 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/DEZC62387058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38f70486799a06fa2b8e056d1a7f73393ee00e2703ef5dcd23d5b604ac9c88. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEZC62400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893ff525a2e465be47fa0c3513753ee4d37679fc38b230770f9414d362605d90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62406946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f9e4326adcfac4b06ceb1590e75c5d6f16ae7aa850d0ba97d1b90bea907d68. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62407929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8759dd655a302aee570e3a6bccd577fb232abd9248219beebe80fd2a8b9568. 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/DEZC62407930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacb3dd583b864423c02e5d4a5f994000368eb17277a511dfb3236668e8d9b43. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:56Z), 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/DEZC62407932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c56647cb80b33ea9645563f245b900bcd56848f1912daf5dd68507d73b8509. 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/DEKF22200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f54ba80c2bf3784e8eaed083ad3661e2570aab0b162c7ede1a3dbef67d186e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEKF22100455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dafe704dc085056901bb29f787353690b8a840abb5ea605369a098251ee8eb8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22101283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c718016caa2e4faa3f60159146bd23c4b64a456f8007752d02cd7c3caa5cff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62019363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff6d602a311d58d038ad528ac4e68fc7847f0488d01423a518eb0292c286454. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DELJ81954779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0672ea9e82490d73baaac0d03ce001aefc131e27c13ca5c1d0a52d736fc84e. 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/QZHNA2157051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5641efdc60febec356dd98ed6a69355b477a82754568be2327cb221e4c4c2a6e. 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/QZES52365051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0672ea9e82490d73baaac0d03ce001aefc131e27c13ca5c1d0a52d736fc84e. 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/QZHNA2157051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a60bde47fd9a8d6342b7ffacbdf049db28418fce7d772f826b55290f5b62bcf. 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/FR10S2589548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a60bde47fd9a8d6342b7ffacbdf049db28418fce7d772f826b55290f5b62bcf. 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/FR10S2589548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581a8d49dfd47905e3177578a6bf27900c41c0bfce3466c1c0b08ce40a063e2. 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/CH7812218018.
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