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 0x5e5c93d95a0465da698d6e41e366cd866aed7fd2f5ed414b887905a2deb31fbe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/109c852b-34a2-42ef-99a5-e4140f4a7c2d.json and https://artists.proofprofile.net/proofs/artist/109c852b-34a2-42ef-99a5-e4140f4a7c2d.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 0x867f4d87d6de6c9fd426a56a89a925045e536824b0e78d5bf5f9ca7f220c3130. 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/VNA0F2011109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bf6847c4c563518ac61e7090be8ea476a0e281c55175e46e271cc56d39f3d2. 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/VNA0F2011115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7223efe610f2a3e078756091da0bbc034f5ce3230e5be9e045a183dd377d125. 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/VNA0F2011120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178ac02c0dff00acf7f1efe1514242e04989717a432a510c7e8a709c848b84c2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:41Z), 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/VNA0F2011122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb97dde417f6654b7f318b6df6906a979e97c4c071695c4aa4ebc952e6de6761. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:09Z), 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/VNA0F2011125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73778d4c00ea44245978c51669c488d09fa7f5c4b75d8882ae6c4492df9b843. 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/VNA0F2011132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4be6076c15361c733924e65e0002910f722986784d7f3fa2691e4d0de263fc. 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/VNA0F2306905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b906fdd09137b7ed1ff5a9a21f3d34f53b1710bd862efebc3e4485f23300989. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/VNA0F2306907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8163ad4ee8f87daa5bcd5360d0d3d0d498b10f60503fd4af123d99331523c. 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/VNA0F2306886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578bf17cf593931f0d96b18fb527e6850f00c7b4f014f2a664538627362ba2c5. 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/VNA0F2306896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcd084faa9501a4e4f8086b93387ff3267a9cf405605a0ace448b8735709e30. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/VNA0F2306900.