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 0x657448fb549825365366ff43641d1bf2b50ba05b12b41990d1e5b2cfe43b7c8a. 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/ed12a0f7-e30f-4557-9da3-5fac3742216d.json and https://artists.proofprofile.net/proofs/artist/ed12a0f7-e30f-4557-9da3-5fac3742216d.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 0xd1d448e81b342b22ad839c2913f8aa598617dded7d3791ff93a36777a3e62139. 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/QZFYZ2300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e3cce7ad97e60bf3cdfff30b2ebff3b216350ab8294c3569a929d2a9a546c1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZMEQ2308699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b9a617356d897fa2b9ef67a292d5513e817eea605d18dc16c2a8f1c86282db. 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/QZNWY2320301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42daf2afb5a675a636d14330d56e0d523c9c4508ef96f4012ec3a4768293ff8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNWY2320302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b17cf031cf7a0cf06e1de322cfb22699251dd582e2b053729640102f1174f2a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWY2320303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0070257f31889439595e7421c404030c38079718f450d8223e809bfd4b6f7c7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNWY2320309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37b461acefdd3891a210c825441dd8411634738a22bb3e050feec73aebf19f2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZNWY2320317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4dc5069a9f384e61c6851e0b9a2dd6c41fee227eebd31d27f7f8dc494422a5. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/FR8FB2400640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f1fca3b43f40ee91452e0de4afff21e8c83441aafad7f185c4f8bb0ded58d. 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/NLSB72400353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564cef6852a50319a4d462b0cf1e85852d9f8cfe7f9394864d7b8315af4530d9. 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/USANG2439712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78563c51209616d6cd5dc2870767e666b209d7603b5d76ed90c94942f548098b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FXR592401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea860ef3d1c6091d92c0a40efc762cd39cdf3941a758a014282e8c520f8c0bb6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USANG2466651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef22a84f3a4025bd3ece0b12a42201cf3123b3c4f4dd6e7a16d837a68406467d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2462876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa8e43ca08f8109def24d979ce3a6a70d6730517bbf7aa72fe92dd9ddb819ff. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USANG2499036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f589c3ff1ef14070c1ec81d2b2458252cc54dfa33b1cdab34349305d7ffc89. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/UKZGC2410606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3c8c9dec133c14a5f95ab539fa964d7652e714235346601a5a683ff797b8b5. 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/USANG2499063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf3e50e36e4f8aa9636cd191cfc2085b5af628616ab2b284d801b2f1e9ce3df. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3DF2521054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0a73242a694957c8b7bffd75ea9f36e564838b531f3e19f95625626a3b20be. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US3DF2529258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50314aea943d55a46693efde04e3e7bc39869d55df67d98fc64352f479e7895. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKZGC2500946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5aa0772fc15d0560adadec9c3f612ad3024a28e4cb2352db2d17a5604b5577. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USANG2522817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36897119b14538cb9ed1e3c90f1fa0fe9780c42fb37cbadac02f1800395e443b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2523758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9026686e7309008c3d66d5dd1db73b5292ed16abe9b951fb2acc4047ab0100b3. 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/QMANG2237319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bf500d13681b93e89fd72c2e1932b993ccc934b74bbaef53a5cace40b211d2. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DGA0R2300768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a986b934e0dbe6f1cb2f77071165e5ac82cc8440bf0df49c59586cafd940f0. 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/QMANG2424105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60837acc0bd33c04b31258cc0d34289d98298df4b1e4edc2ab5e967c4bd3d28. 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/USANG2445701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f849aa280663aef16fe87e79f1295c991e2b2eceb8d5c7559550fdc3419a0f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH7812363159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82766a2eb43d8e9baa4d10fcb4757fd6e5c25800624c676bda13b3f5451e1a0. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/FR8FB2308250.