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 0x128bbfd32e78fa9665a64d91cb38da4b46f9bd22e5cc3d656f1a37937cef4911. 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/027e7661-9750-4700-b3b6-9d97d9fe1ae8.json and https://artists.proofprofile.net/proofs/artist/027e7661-9750-4700-b3b6-9d97d9fe1ae8.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 0xbf669d92e642c908e1ad92e709bd699932de4d2adde504e7aa36bec73e4b8e83. 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/ITC471920083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289c469c3c99b941d2e2af0760ae994e39400fa2c3643704cb3eccdf75424e06. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ITC471920086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a869a11db84f394826afdef8ba4cb17b85a16b4dcbc058a6903bc46d93b2e1. 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/ITC471920800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585a5595669e0647506727bdfa90ba2592ed14087a1951b2e51452a022cac788. 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/ITC471920806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc6099386ba0d22c035d6d40a83750e3daedc945e5b5d59639aeaecaf1d886. 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/ITC472020005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7136a25dcf2f1c79616847d60b00f6c7dd8449c2d9f488b6788614cc54b2bb84. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITC472020010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b20e9685000f1c2598dc9701127588537db82811f718d462ab86d9b958bc911. 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/ITC472020011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6847a566b8ad677b4c504fb85d9e38f969529f8e0adbf84a6086cdcfe352a52. 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/ITC472020012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ada675decaaf5f9929479d42908b94dcfe8ebdf869329e606d9b393fff6766. 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/ITC472020014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e516307e6e8fef1b573eedaed833d2969c474b6d037099945b42bc53ed95b0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITC472020015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4308a6c7e4890b12414f00525fda05d008d72cc9d2ece5237577285014958161. 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/ITC472020016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e61682eca44cda13c89997d4f218957015f82b9e712ddb48bed22241fb9d83d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/ITC472020017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974c2c4cb7cd21d0fbd4ff1893557eb384cd8332d2bd3dcc1e21744a87737cc. 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/ITC472020019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b7166db8d7c9b5cac8b33990408c819e59f473d95aaa7edf68fada7fb7b95. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:17:14Z), 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/ITC472020020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0ccc1a704216d045cbef60abf875fbf4ffbfe2506dda1386a28a30e4cf0d3. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ITC472020021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe31bbd49ad59916219de75223db7288c2a8e623073b2cf9b82cbc8ce5d76a9b. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ITC472020027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cb5cf4f5ad3e679685dccc5377a68d71ea9277ecd0af9cd4a8a819e53f4a96. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/ITC472020028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b15864f8050111301b33515649c39e07eee813185377580b5370719506620. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ITC472020040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaf78276bf196018fe9e5b8b878731a6a5801e6329576fa8bf79b16ac59780d. 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/ITC472020043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96c03d1075216c642b95ae7f7490e2dcb12b4f4def53c182aaaf2ac6f18780. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITC472020045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020439b803c947543be467a6536085e2cac913a83c1cfc0e48d9417df39d361f. 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/ITC472020049.
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