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 0x3f86d2f14ad16d9da55c7732c3e0025727eccd003df0340716fe17e30fdcaa50. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bafadc09-e12a-4bc9-a21a-23c6dde29eac.json and https://artists.proofprofile.net/proofs/artist/bafadc09-e12a-4bc9-a21a-23c6dde29eac.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 0x5e03c84f2bf644e8ad0be3b06179ebee5e3784851664444d93e0e5fdac9a5cba. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DENF32400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33828c9e924ef0d9312f4872cf83232eda25b17ef8ce1418f909f99ccd1de7b2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:33:36Z), 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/QZZ8B2411142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abebab811637b4c5f51fe25d08fdc1ae870309e28185387a0da44f361b35c24. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:11:05Z), 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/DEH742438549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0699db5c1a9585373ed2d4acb08f1041ca82de3bdcec5b246ea842b0d62e4dc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLV62415861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64dd239c055d171ed6d559ae087f53232188c5ecf70cee64c335106d25ab98. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US83Z2425158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4254e8429c2241c4dff8a7ff06d401160aecb90160e88e0a0d78660317a04bfb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:51:40Z), 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/DEH742500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54285ce8d7384d38d6b5a3697c19afb268ecab8488e6d09f77f5f532d0862760. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/US83Z2503654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a416b945315f9f6c24eb1eb21389049028d0b901c00589a1162c65c3fb143e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZG2X2412702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ce9d221b83631a2d70cee0184d605dd22d42a0fecf6387c8dfdce7483fcfa. 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/DENF32500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f1da6ae5892ee7202397e45c5070c9308e34c78a642cd9f7e77b2a12e04ba0. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/GBKQU2540520.