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 0xdfff8e1f00de08236dd4020a8dc0883e5217d9887939afb2972099f46a6db3cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56db2429-a951-4da5-b816-af68db706f3b.json and https://artists.proofprofile.net/proofs/artist/56db2429-a951-4da5-b816-af68db706f3b.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 0x56d8b519b9a6a81a000c04257f405f5d2cb368fd5a670d6fd6cd746e44c20e90. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2556407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee86ea0b22132b9c752067f8f36fd2a23a0f64cb34da2be9d8094f87b37c57e1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXH2J2556417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464abd0998cbdbd75c28a658567fffd947ba685465552f7e1c93f0e8ef49805. 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/GXH2J2556410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3467c94ad69b92b932e39fe13e12466275e72e095f99ba531616b2fe54eff974. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GXH2J2556409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8124385825382aa73c3672a5b8d2804b0b28518bc46b7e4bee646da4954b24e8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXH2J2556411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af0f6f876b9489aa18b2da4483d48fd895444c345336314ba3c326faa5ed798. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2556408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0787a63f433196d14d16f8a4e87cca60f850fb3fb2247891dde1e28f440f90ea. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:09Z), 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/GXH2J2556412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5231bf1b142cbc06c9decd41122384d7fe8a850e342a747ae8b01d27d99831c. 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/GXH2J2556413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf3b1b9159ff8b957c4e72210958b5a078b86a789ef145e9882ef96299b63b5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXH2J2556415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c15154955db4d1a1f6ab35537cf79ba4cf4a48ff405535ef72d168ca5e95e1. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/GXH2J2556416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b952dd06a4467daea2123ab4d47ec9d36d42232e538f6b65882b57646974ed7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2556418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3fd7612d2a94a843e989ee908b24c0f9f80476c9a5f0ea575249eee383a8ee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXH2J2556420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f7f5c36141e20c07649fd037136cf0bad6bd6d782b374dee0239f4b82f6e2. 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/GXH2J2556419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b1fa3395fa63a1f029696f22cd03f08197277b02f805b019ef522bd16ab428. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXH2J2556421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc51f709e1cf1086ed28d62cf1c781ae057ca767008946bc034040172d79201. 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/USL4Q1885456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10064465c0b7a466006abd95dcbd574485457b45f3a3301a9196ef9109e66b05. 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/QMDA62239284.