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 0x8c2f9db708c8ef2adab83785bdc51ac4f549c78e333d3a280b20a33609238b20. 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/d6ed5087-02a3-4335-a124-8a94ac7f8bdb.json and https://artists.proofprofile.net/proofs/artist/d6ed5087-02a3-4335-a124-8a94ac7f8bdb.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 0x18ea190acca650dedee18fa582368f0e10b25afe8c0abe875d4a0e29ca67c1bb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:50:52Z), 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/ES5700401047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2250f377f8899b55cfc915cc38352c2bab0a25c302db67c645698e4f25b247. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:48Z), 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/ES5700401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a1e67a4a8b8040f242c83a559c4086cc259700e9c3af6f83ab7690c18923e0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ES5700401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb759e0e1a9b8e91e6f65ec1731a5d4293dcfa489b5a9324acfbedbf0a8ea9e16. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:35:22Z), 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/ES5700401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bf3dd16906a1f489c6667eb90abcf3801b7b1b0340a2d7c11a011ab82e16d3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:38:58Z), 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/ES5700401031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e498445f7fafca478157420bf72586a225d67f831d5d77037f3ffefaed8201. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ES5700401033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3aa280453627f04067a51984e6fe4bf328b9a9c6b20fe1bdbb55832e16fb6a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES5700401034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc955bbd440a6e2fafb78ccd72554306f165fb1109f3f12d271d0f2b7fe0e3826. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5700401037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2795362c034a3cd8cb48358e4316f89560b22af7b2a4e65f62b7bb881fb8bbbc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:10Z), 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/ES5700401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5fe468e980d20669596735da44c19e9fe5dfe10f61848c46fce16f5a8ab2ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES76B1000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeef4c0d7866cda68712153d3593e639e910505469b67b1d30cab716c8c827f1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES76B1000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721360557fde0fa972519b17faddb2af967b55a0f5904aa2c3302c07ca644681. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/ES09C1700330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0ff5845452ea108e13a9d87aa7ebdcc52cca57e981146a7df95741cdc1340. 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/ES09C2000003.