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 0xf04fda215b0d020027929588c2c60ca3181e26ee53d07c0852ee909f4753fd67. 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/e73802b2-3ed5-46a9-a93c-96c068f1ae70.json and https://artists.proofprofile.net/proofs/artist/e73802b2-3ed5-46a9-a93c-96c068f1ae70.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 0x0ecbd7bcabe3e0df011bb084ba3f03436958703e5f81d17e61b4079f9e9d498f. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZFZ72293822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecba4eb53398f30feb7553845293d92f2c7c6cd9d490c62ac3cda2f8ed53ef68. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZHNA2255174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9f870fd2bb0414ff03f49deab9ed6b85b27cd93e70990c4da778bce65e973f. 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/QZK6P2260421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eed73a896ca5b309c58fce948de5a19c7b61384263654afc747c7fb476dc87. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6H2251215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c75fbbedd5cf46a9d368c2edcf218b3b1f99d3c4726ee6b182856c5f42a5398. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTB22212563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6115f6e75d2783aef5a2d14ab4336c0e16d9319c45ded78fe86480b95fe646. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTAS2296894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31809541aab2f7b6b58d0460f66f1f2c97bf02ba4e2bb53c6c8ad862b0a428c4. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZDA62398199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45351d4e1972364368d0c8f40b38b53c2a103dea00a3837e54d66fb712d136c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZHN32315288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65256cf3c2fb0ececea95c22a1b49f7d0e8071cc809970b76b16591d94f0c5f. 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/CH7812351550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455a198689bfba4914aa959aa8f39b15585b75400a0925c0d8f2d32e38fb6b28. 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/CH7812354627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928b8efb1bc4af56de4acdba41ff3d4dbff66b00cdb5fc54d21371e3543e62a3. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/CH7812365055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ece3869fface2ea082534d9a398c29031530233cf6358bfc15bdbb0c35acb85. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH7812371228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbafcfb3406fec37c70b210faa9ab0056aba979f60b88635fc445cb89080496e. 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/CH7812410081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422cb35acb108fe198dc2c2dd70be560d68ee1356118998a027fc7d7b84803d6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFM2403232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5078cea6c1c835558dca4bf2344dbca5f638af5ea8c3aff89e0e7df2dc0d917. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZWFU2404154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6a653190b0c3ff0f0dcc02b576d8dffe1c127c003d94add2a862d56cdd62fc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFW2498630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d29c9d2984d310889d979aa63a0edc1dcf29a547387b1511b59c68f103b820. 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/QZWFW2498632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422cb35acb108fe198dc2c2dd70be560d68ee1356118998a027fc7d7b84803d6. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZWFM2403232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dea499e52151db7ef6a74c79c43ca4c4f62b89948169cf590f7fbcf11a79cd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFW2498634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108423e5a9684679bc232da7fde56613b566c4fd5f0e2867e0fc8f6ab0269bce. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZZ7P2449157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e124a9230618ff8a5312b29b92b2f001c63b6f4eb8807cd894d988c95db4bf1. 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/QZHN42534777.