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 0xd4d9a6f61a2035ff5327529377cde6cbef47e9306532a84a4e15cb365c5e0cf2. 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/f26bc8c5-2cce-4a47-b78d-c5707c401d97.json and https://artists.proofprofile.net/proofs/artist/f26bc8c5-2cce-4a47-b78d-c5707c401d97.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 0x53c6c2df742d7608f7c259dc06be5bd3c72fd09613b5657f88299130af1d2e30. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:20Z), 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/QZHN32100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e34722b5656c63dfc43429f6b0f49b242a5b4a5ffff4543ceea208ae1509f3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHN42152373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c60741dbfbfb41cbd2888927cd3ad46d6b9123257bdf0ded012490972a3a8d. 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/QZHN72146093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3129a38ce4088119f3f971f51351581ebb6855d7c91073a0d1f35b3e64dfc8f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNB2107124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128939e9533b667ea7de8b5c098065411347bb875f9b9dcc3b4ac2772aa09b72. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES52246569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250fc53327f76545942550f4368eb3d07c4d764814b1645d7561ee48c1286166. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHN52283539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d60d7f35b30de5b5adb4bba449db5464f0b2baf1d09f65718d7132b9ed1b23. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHNC2264955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe036168ed79db7d9ebac74fd7b4c45134916eb1d699f2bcfbac6bf85c50f87d8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2264956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077677f86fdb924486ae2b7d8915de9b73fa8842db2b5da66ec52930832e241. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHNC2264960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcf036f5eda90bd6fc7a0db22048e5e586b20f559d6dc726afc3cf77807538f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFYY2355542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a09cde7eb294840c47317ad5e86ecdd7909934cc840f664ce35b79e861b17e. 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/QZDA82315515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619ac24bbb96df80343d62d63cbe12297485807f54afdb06a7504bed352a62ed. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZHN32342080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe53fc18b3619176ca0234ff05d1e7f1b70513e9acf92dfe0478618e1e0ac5c. 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/QZTAZ2348232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3981a5681955bbb85618e893d9c1cd8219afc9c499acc2f0f20bac95dc55b256. 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/QZMEP2438287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c739d438f5cd683f8ec8d4dfeca8dc45bff1f1d83d8ca40261f2d3ac98f581. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ7P2432380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c12b71144e8b643622de3701521835ab55ba645fb670ebc7d3820cfd43516ed. 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/QZRP42287790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d44f5c95feed74df24b7a251b208c089f5243acc11f3fa533d7051f151499c1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NZAM02201261.