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 0x53a7e01d7428f986f4f45f6da063e9902c0a960d12ac01e56159d73479daa28d. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/206a6641-fb38-46ce-bf16-3c225b5f0794.json and https://artists.proofprofile.net/proofs/artist/206a6641-fb38-46ce-bf16-3c225b5f0794.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 0x74b23f69c32e334e1d47d896a4e729cb336bce1c1c6acbf6136db3f772d947c6. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZHN82517743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191c6bd676d6c8d62d331c9d037c1ce20a59a92067ad8119c738a40a8cae9dad. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEM2540796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf865396c1ca2b5f4edb749fbfc7677b58465cf0108d8d23682ab64833d1932d1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZMEM2540797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e565d7d4c256eb53e840ea41359d9a81a06e83aef4215683065728678466cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2540798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d71826bf1dbb16d5b97f2308ad41ca971edf7b2fbd12010f2cf258435791c0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEM2540799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952a9efb74fefe05d5d44b32789fd9a35359f957ba6168241b19dce17e253835. 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/QZMEM2540800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3350b0f3a0a9ff91c536353235a592fbfcdc7bca6eaae5bdbef38b23c25d7f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:25Z), 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/QZMEM2540801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd288e5393653680395724dbbe4d078c20000f6fd9ba7a97c6b5c8f503662737e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:11Z), 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/QZMEM2540802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee5df1dacaa5f0147e1edf6d99f2f1952aba9040bfee8b8f5eedeb3b2421ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2540803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc610e087c96cba98762b9e8420c553dbcbf8edd33ec28deab6c8f774d65561. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:44Z), 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/QZMEM2540804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a50de23d14f9b5760c7eed1aaa97e7ad008b2937e73535e6b432dd066fb8b0a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMEM2540805.