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 0x5e35c170ec0050166821d411d943aec9a66877ac03b9a1d48cc4cb3296aa488a. 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/db0cc185-0fb7-4067-9335-e22dd39e58a8.json and https://artists.proofprofile.net/proofs/artist/db0cc185-0fb7-4067-9335-e22dd39e58a8.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 0xe1c8abcad6904232c37ba0745f0142c54af303926e6e43d1bbb06967138419f5. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QZHN82054663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5475d535723ce9ec8a01270538b90b546f6ba72a257c10028dd42bf7a83b004. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:53Z), 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/QZHN82054664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14dcc6abf856f937133c0e5204777219f39fd0015b8526bb78d243bb82a88c3. 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/QZHN82054665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8776f47a96501323e4eeea66ce04eaff7728265ad731dc03d5f34b7cdcac48ee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:41Z), 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/QZHN82054668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816035681be3bd6b67cb642036425bf825fc0760161f882e0f0a3707ee6bb6d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZES82257623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2370db1c7de4123663549b98460dbd78f465e1ad77ecdab51785a4998157841a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES82257628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7332cb89465a29b61fc160ff2032821ee42e1bcbc408701a38dbef3fb256ff4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES82257629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98484ef3549fed1e3c578037f36e0bda3f58ea8305b77f87f9444b19617cbe53. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:36:59Z), 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/QZES82257634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136cfb62f4124f22452ec34ecf119cbf63a97d1397fcf8b4f28ec4e7ff19c496. 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/QZES82257636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a00e3c2436f5af7a48be502d7b02b15cbaa15d5087c02f6e210f91c961d61c2. 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/QZDA82398009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f749c04648c52c9434bc7391fd166a027d657c04ffd64005828f4dae537e887. 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/QZDA82398010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748c538917f4218cf06902bf8594a53cb149dee3985c37f970fa53e2244724bc. 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/QZDA82398011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718ada761b78852f1f5f2853f18b2f831761d1e13142e49aa5562f5278f373d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:30:26Z), 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/QZDA82398015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade448070061a3e86de3fc7316e0b8e77d37d488a0017cfe3e7ef0f6a20b92bd. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:27:44Z), 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/QZDA82398016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ab1a6825b1096f767051162ffd26d8bff6e009c4ab5daba3b00bce50464865. 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/QZDA82398017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49d381b139f93764bd64ed0878f6c6664fbc535686923d63224301c6a9e6d68. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:29:44Z), 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/QZWFJ2454321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f48f7b17d2b119255506bbfd06a3a077240c1962f168d08bf508f7b90c9ad5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFJ2454322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8504a6748cdd3c516b9a64676a2940589d0ffde632d98cf6aa4abbfbd5e6055b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFJ2454323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3db35eb45c6f7b8ec62ea43a648b90afa9ae18de8948c33f10d90176e8fcd01. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:27Z), 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/QZWFJ2454324.