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 0xfedfcc259b81d521dc6c028490568dcce6aa7f0c6f8a0a3bd6b0cb3c18c4286b. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb369ad3-8158-462c-acd2-284e51ca9cff.json and https://artists.proofprofile.net/proofs/artist/fb369ad3-8158-462c-acd2-284e51ca9cff.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 0xf3b802c60a78516ca2115119dca7448191084c62860198c4c4cab0de62f9dd5b. 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/DEW251801432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf67f005ad73881de497a7cc81113a27889ee80fecdd2c59ba530e6b00b775f1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEW251801433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138a8dc0700ae5deeb2c8f17094b509237bc2f7a4a2dd8a6485f1b33abd0553. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEW251801435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71156a7b563b0c65067e4212bd24e989d897dd7801f944be10e05fbf9cc3d8. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEW250801355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a163f62b4e3941039f662ce44a3ada4c1cb4bd17ad4faab17fa598b946bc1a. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEW250801323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213130fa16c2c5060eb6fe1f67406a7febe8c8498742fd06730c8508e6b981a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEW250801357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa511e3109f5d06b84aec37c62f8ed66deb38278a33bd64a2cff5be81e57da597. 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/DEW250501217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a138e5823be34cf280846c4cb727bff99dc7ab58ae293dc330bac3f8002f52. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEW250801318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b09dee13337f2eb8452f60e4337053e1e878481c7498568693d6503e7e61650. 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/DEW250801319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb304ccd0e3954bcf85ed3778dfa2c6565c4e6f69cc824ab96677815de1b20ac8. 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/DEW250601255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8513fcd94b04ce6350b8d8e3ec32c7a35820c09ceeb945adca728484503b04c9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEW250801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdaa10881130a97b59104b953b75229eee4276b08643bced96c9e11e3ea01ba. 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/DEW250601263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19fa698a3b1ca025776e06dc4486ce1530064016eba4c18d1b68184a30c1419. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEW250601274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a918dcf9603a6c0bb14fe344090a9d07d2062fa36135c9e44094a287840e06. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEW250601282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982332531f02620515a3b89df0318797b1602c1bf8230623f99b5213241dfa29. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEW250801322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e038f2248fc5b2b810add19e372cbc3f692991b4d1e2f4ef202bfb446255b5. 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/DEW250701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54604dfdfcf4d922a8a17a9667a8b31b29f664c81282f13d25dfbd7c91f17a6. 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/DEW250701299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd71e445540456ecbf990c761face8cbe3547ba10a48fe958a0cd1916aa0a9c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEW251801424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3db6436d9c8a61986510d7127df50c59db8179fb172fb0ace04795b4a51ee90. 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/DEW251801427.