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 0xc331c91fc0a54225760fc2053a5eacdffbe151101a53418f2725db0609d5ce39. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/744e8b32-3c83-485c-81e6-b7032a4c675a.json and https://artists.proofprofile.net/proofs/artist/744e8b32-3c83-485c-81e6-b7032a4c675a.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 0xe6ed9d40008088fe12736878b33a87728b64ba5f2e151b5b4cce4f72b23dacc6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZYFZ2361324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd78942ef90180720103e9866a06e44b91cdb232601a768860ef9fab95fd98. 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/QZYFZ2361325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7572b83651cd0f2512e91fa175e489885fca12d2ba3ca6f7f0cd05b52f417af1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:14Z), 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/QZYFZ2361327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ab3fa8157de95afb05e787a6d4942fc1edc7080768dd15c55092b9dcdc1ada. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:26Z), 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/QZYFZ2361328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e418c5e79016ce37b9fe1c93571c198d73fc6fc7f9688b0630cc961bf54b267. 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/QZYFZ2361329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1a013c7e03d4693ae6f5386dd48a7aef68ee727410a2c8b4a5f8a563540caa. 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/QZYFZ2361330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9b22ecec5527bfb14b9226091b717a05abbf84360181ac92027a56b266edf9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ662433207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1277fbc9de87a9a060c5b241c3c5190bdb5feb53df7c3426f3cb0ee451d641da. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:30:15Z), 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/QZZ662433210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a04361daff9651bf95a374434617ab6e341feac01211f743067ab0b252dc8f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ662433211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110217bb055f3489b6e2d3699918d73576c23c51df02197735c32189de148a58. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZZ662433213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631498ec4e3c9ff88176e57c91a0977affbb8a5dbd1abe4c9351f2ed5cd20e8. 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/QZWDW2490019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f601a50a1d3407d34d4fe143482a45e0cc06c436f7d4d25f0b5c51db22a535. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZN882559570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c28339df17af6ff181d2313ab5322330107096133d90274bf7279343925195. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZN882592256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e31335b850938b7d3575518b0877db348aba4477984179bb82374e9aa456d37. 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/QZWDW2538793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741aeaafff115e6a0d91de9d6244cee1ec1fdb80bdd977217a87e44d86a11af9. 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/QZNMU2452504.