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 0x38b2119f17b07003761730d9f896f8b8b4af786e31c40703edf6f8513a461f65. 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/3ec7f534-4da9-41db-8db3-b81b927120d8.json and https://artists.proofprofile.net/proofs/artist/3ec7f534-4da9-41db-8db3-b81b927120d8.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 0x0800c0a1ed60123c91544c2e60eb68309f9af880503556dffbebf15fe900a527. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNWW2229798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6826ed1744180968a62c030deaa5848575edb44a2fe289e379df911e28e043. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWW2229799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7361f2f292a3f8f5d332a106054d57ebe717d3e3c4552e63ff9ed02b1f47e464. 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/QZNWW2229800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68606c62713f6b924921e66bf47359760e352331a0a981cc917311cf0e879755. 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/QZNWW2229801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a70b5a6b3dfb91f2fe18e116bff942a856ce4265f88ca252d284dbbbe41119. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWW2229802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86496d828948389b2f9a4eb20cfe5d3b503ced4bd8752e9e2b7a92696b4e61bd. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNWW2229805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1eb9a177e13e5a50b69e4aa95724782095f970feb21eeae588c259c16b5cc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWW2229807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205b76e162d488ef48f006518773620380e1ad803ab7b8ca29032e0848c0cc65. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWW2229809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf47377ac7f0a4265a0872706bf40f74c6740e452beaa4c32e2d34a33ef793e0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWW2229810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9098ad5e58c0b03bbdec794233fe63b86876c6507ae542f97ac002165808f252. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEQ2321854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4574e65127ef5cfa3c0f5c4d7844d80bdf0acda6625ea5822d3d301277a20b6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEQ2321856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d0a4fa23ff118c76ffa84117b8a6aa4779dba96cf8d685e45438f6c11c81c3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTAY2301829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb51326b9c2d12a9025e5094962d8f212c90af3931c6d2afdada37dcc5b063b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAY2301831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1ff53b76e51b8e9233d659c8076df7fab09a0f809a5132f7e42a3cb976d65. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:08Z), 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/QZTAY2301832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ac6b602d8844148697efc3f174368a758dcda8b61e74525d089db8ae2fb73e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:48:02Z), 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/QZTAY2301833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb6821a45535c721eab1f4adea040d64d257bb8abec1a44ac2f5cfbfa40f8ac. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:31Z), 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/QZTAY2301834.