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 0x3c74038dc7a2a61ad3398222abe385c8b830a506b93c91b196dc3d0d4663a121. 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/de095109-cbd8-4325-a4a1-2d153dcc7d23.json and https://artists.proofprofile.net/proofs/artist/de095109-cbd8-4325-a4a1-2d153dcc7d23.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 0xe30fe2df9f8b81dfa7405d75fb40915739a7bbf9531ff8cd8027f3329b1e7687. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:55Z), 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/QZK6K2465821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682d5de5e683edcb4d795e7c012ee6425019fa9f41d5590e58e0d184d9840baf. 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/QZK6K2465822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368523c39c46318ccd6eafc2258c73f801dbe8d4d39944ad3187f0dc1f8277a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:48Z), 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/QZK6K2465783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f8ce569c24ab0083062f64ac46eff7a69fb4d28fbc1d86b8818797bacb037b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZK6G2430779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446cb05e6ae57ea47086fe979e92dfea1de87aa3ffef32c7a84870b9bb830b8a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEN2453861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc1374ecea015f3152f4cf45c8f8eb61d4af815ee78407a4600900817af1cf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEN2460163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276087f38e58a0a2c4c7f076874b87005259ab9ac245066aea2f83d39304894. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:41Z), 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/QZMEP2453550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb80b91514175c13ee051dd139c1fe3017d7b937838bb6a077a3b17082708a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZMEQ2448593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78bdae279484c62fbbe15a7e8ff063247b8fedd051effa5d417a86aae916bca. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMER2464039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9b5c1a80286f64ef68c4e8e154a0a4ab704f702c51dc37714c83f2bf5a0af. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMER2465097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a0541e1beb5d5bc0df396db1527399ad511bc969e968617337dd96c0b4d784. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMER2467589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e78e33b51d48d35d16aeb085e9709378a4a8ae58f82ae82bdd93a8df3bc902. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNWQ2402311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081e28af9e0183ba8f6062fb14c756bcc4d343cef45086d3a9ed1a852c3be7d7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:02Z), 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/QZNWQ2403813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ebfd118ec74e91dadf5b2a7fa6033fc4fcce9ab44f795cb5f94a833aba8ae2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:16Z), 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/QZHN42534141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ba0131e6c0258c206f81c73f32300b584919db03765c9e8cc57b209f005c2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN42534280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf099fbf499664630509c4631b268e4ec2be07194e317c4a988a28815849d8711. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:04Z), 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/QZES72598006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9c2ce305ceeefbcc06d1bd6b0e1d988caa66fdd6c40d5a7a5f2635cac07e24. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFP2564726.