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 0x6b3ae6b5b8971bb2a42eb54266257541399ac72639bbb49ed81f79ac356f78e6. 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/1ec887b4-0989-490a-be87-b9cf7891e374.json and https://artists.proofprofile.net/proofs/artist/1ec887b4-0989-490a-be87-b9cf7891e374.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 0x00cd10ea0b0b1a798f9282aade4d0652bff35eed498035dec321142cba537486. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFC2020042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752436d5a1860bf52e041ac0d80f6d16622dbbf05890b89b8e51f4f494be1eb0. 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/TCAFC2020047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d5be636df809bc1b5e285a0354519b8dccf207566cfe1bf76d87733327fbbc. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/TCAFC2001885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4714dbc3238c0c749dc73cd6b738bbcd0a3e7cef7a6645e2d99350ed19fe05c3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:23Z), 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/TCAFC2001898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7712ef457bde69bb4b9af2d296feab9ccfeacf0f284998754eae509a8072ad4b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:05:20Z), 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/TCAFC2001906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412d92db0377bac01aa0ad9135d8cb6d059ef6c1d84e3d5575c989edb767b35a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAFC2001918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ea1736695191e7ba8ea3925ae3eba7682f1459e967bd0a0e1b6b773c131c93. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAFB2028211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab165b87cbda9609dcf4f9ab3a7383099a07752084d2b85228bb55ddd69f7b0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:19Z), 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/TCAFB2028222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e7d3911b7b3690df651facbb61a9c7d773918822cb8374abde72c715e9667b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAFB2003960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa447370a479b96b05d34cc5b905daa70a6fb2d6b4e7ffb88f1a9764241ff20. 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/TCAFB2004118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b9a08e92cb793a3079d84072ff6438b4c438f11421d49f7ff3a04654a449fc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFT2141477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367949cd0716d41685d0f1026b0e35b44978e3436d58c673f1b00f81cca6c963. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAFB2062899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd413cb4423adb837e41978cca23167c3b612f040c09a97b8228f8f10742ebf2c. 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/TCAGM2203662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266dff8d85e4a071bf8f476aff06cd99db70a5a1e5f4d7950873a7cfd78c3dff. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:36Z), 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/TCAHA2350109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f827769f8a7baed7554e502075692cfdbbd51ce0625e31c5362f4f6c4925e4a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGM2203633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00302c670477c0b7eddd68240753f68aa8af44ade5d80cea949392075c425f0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHA2350104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a7029f0413ab32ca9c211c6d00f28379900771639e5f4a60141385ea25adc1. 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/TCAHA2350119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980bf6da112c2005a9e92378fdbf6b81b5533543a9019cb3aa4bf90e2b8cbb03. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHS2358536.