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 0x5067758bf8bd8adde2a25a2b7c8a1a0399b6f19399e3b55f8ed4ca14e1ed3b78. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca386b23-9670-497a-9e2c-4daefa3e4e27.json and https://artists.proofprofile.net/proofs/artist/ca386b23-9670-497a-9e2c-4daefa3e4e27.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 0x3024e7206432d8436e7f677b4ea0754702898f206c91b09a3df83ae065e266f3. 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/CA5KR1711461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f948e13319be598f2e6d03b6421b6b67bff96fdf685a60537e43d6d473839fe. 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/CA5KR1711462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c80e8ab1ff6971a61b2d035616cd31561de65a2769e79aeddb387b00ab726d. 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/CA5KR1711464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb419ebd5fb10eea4f871911dde107674574e9070c9d59fd7048d97566533055. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CA5KR1711468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd81612cc6542462b1fd214515ff4b46afcb23dbd346f5ac7929b8f681c220. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR1711469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f22fa15e71fe2b9473fc667298979d73b1f17f74149f8de85bf066ee2f859d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CA5KR2313401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cb70f5bdffa64e415ac5860912a1830e049c84e0c34e66d049d1e10f669fb. 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/CA5KR2313402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b112983983e12d48b19d370c5ec968f68544846bada4a7aba546ea74d89bcc7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2313406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57b0a011aaece5fdb179031fc6dab8d2bb03981b3a4f437be95cd09419ac139. 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/CA5KR2313408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31c61e1365f0d96545045a3efd01bcc17e366ff2e85341c879b326de0d12d79. 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/CA5KR2313409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdb868e2711c06d221e723c83225ea740b4263291734e0165cfc41b14e8fdf1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:27:24Z), 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/CA5KR2313413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85e880687e211b64c8a429fabc0abdc7e578722f1cee56c1216695eb7861e08. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CA5KR2412642.