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 0xc7d918fd98bc4a0e6fc09c9832082477b77bfcab9bb54d7528e4d67e2c3da6da. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16e0fc7d-5f06-49c1-82e1-234033bcf1f0.json and https://artists.proofprofile.net/proofs/artist/16e0fc7d-5f06-49c1-82e1-234033bcf1f0.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 0x4bc59fe585a037cacd0479a7d57fcbd2cd445383e87274611717116017295a76. 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/USA2P2350516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a33f52cfdd8363ea5393526a728022ecb18e0e2881a105530b8008f38f607a3. 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/USA2P2350905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a19ccc798d09bd6b4c325aec12ff6685819d39cfc8e1a1ca20bdd13d32f569. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2347514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c292f93be8a36ab7b7bbc5ad7f7d5e95478db61bd8976866061def8664347b. 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/USA2P2347812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0db6f4c5e14b7345b57166e7560f4f5a57beeac9f1b9862075dfd672242c8f. 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/USA2P2347515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c268fe055c46821197dedb96eb11987af05d3bcc0778096b34a7564d5de22b. 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/USA2P2346067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87677aa25cbfbc18f1fadc06dd6bb3d98f4f9870c45522bfb63c475e73afa850. 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/USA2P2345833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0b9840d8ec9cdc744ce2af353a112ea79cef39b93572f5e65f27ebf0aa504. 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/SE6TI2352163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9b7382314e735a571b030ff119773993a5d5caeb30121ef6c091b0de8f7e7b. 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/UKZGC2303088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26355448bd09824dff0ef3028d76c86130f2b2caca785ad5348e1b705cadb99a. 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/QZES92383471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c442e57c6db095b607ec9eefce504effffd04e9bce14d29da181fda99cef3b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN52363001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456afcb246f9cbdcacd4cddf2fd4587f9b730506f0429e7f1e8b130579491578. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES72355594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e6354160dbfcbfbd6eedbebe266efcaed9f2d1824e688296c90114daee2d0. 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/QZDA52329231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00ab09f363dc9f09ad627c13eed6601c14f221c064d40f724d6f0201643a0c. 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/USA2P2401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd0b9840d8ec9cdc744ce2af353a112ea79cef39b93572f5e65f27ebf0aa504. 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/SE6TI2352163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db70d635d9a204d748b7486178a3168dfd1b4c8e4a650b0d4abece868dde77. 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/SE5752451459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a51705f74f1debd102bfeb8254c3ff990a35f4b409d7aed82ba62a42b7bb2ba. 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/SE5752477571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef67b600fc5f069c604fbf3a392c7de1fb7f3f1320f55cb2daae5f89d66795d. 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/SE6XX2526736.