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 0xbb274f27afdc9d66f9b31a269a2c20387834e8801e35443fbed87d063ea536ed. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/666d59c5-b063-4401-9110-4a07fbb3bba9.json and https://artists.proofprofile.net/proofs/artist/666d59c5-b063-4401-9110-4a07fbb3bba9.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 0x0bc758fae43fb94bda85aa5c11b4b743c8540e804124c4773f5eb9ba26c3b155. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB22580172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe783453cbce5ace558caa45a6bd4097a310c34e15319c2a926044d53a55e6ae3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:23Z), 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/QZTB22591190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3cb6c1d401f855375d70eda639f75dab4a001ee08189ac4c859dab1411f076. 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/QZTB32530471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54eefe3d6a3b3507fb00894c0a9f3a5f793148adf165efc81afef158c0ad446. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTB32535733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f72150c1fa67658383819966a2dc13ec404d577249b110fb5c23a443ed5ca3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTB32505433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dfe467c7331a4e0cd01bec68c575081fd5da3f6ffa555be5bfcfb9bdde9968. 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/QZTB32567106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef96f4d7e9640fa0f2a3339afbae1973247056b7a5fec2dc6a9f2e4eab84443b. 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/QZTB32567107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6231ceb298be280d861ac82bbba5465de9918d1a38d7f875133072dc475d1c. 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/QZTB32567108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb95f9ff3f7a026b456729f2bd96cd63ecf895bacab27b0c06ed64a012134948. 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/QZTB32567109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f430eb07aae5ba708a6c8b64110ac60381aa55d3b4ab3cbc4cd4876ce7b041. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTB32567110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286a6d030b3a6f44e7636195eb7f6cad8e07e11da7e39003f45f46ccbf0f742e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB32567111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b76a8ed49e96e630dc631e0883535bc55248c9d8d392e3857ddcbd43902697. 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/QZTB32567112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12829d21415d0cc106563a67f5163e97372ec5872beff1148dcf88b5082d8ff5. 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/QZTB32567113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eefa142f2f7f0e806052c409a6d159f6f211f6d431aedf363ff176d3aca947. 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/QZTB42525015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcef481be197e099b13fdda868c52a63eb689fe20daf098cc94119997dfa925. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB32596864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9634b1dc4563fde7a826b59626c41efdd21d2de714ade9820a9e2e69f16239d3. 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/QZTB42525056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626b3011130f4df11b66ed422269f2dacd72195188ceed95413b1f38da07b3d4. 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/QZTB42586669.