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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0904e283992f905e22f9b1a9fab691a9c2be77f1d64218345bf526aa192620. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52bd9937-03ed-4ea6-acb0-dd3af7ea3949.json and https://artists.proofprofile.net/proofs/artist/52bd9937-03ed-4ea6-acb0-dd3af7ea3949.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50249c2d9fa95712f14db7738a997d14775637a4e323ab6e3c31b83dcb4b6649. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/UKG241800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597c1dff4a44105acef05636c281556bb5c29fcd727d49ae91ddf5ddbab4ca31. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKG241800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150a60b6b855f67e7ae82ed6fbd772536197c4fede8ed282dfd75dcdc07c798. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3be3c3c215c1d6c3787918fc62ddc20b2fdad8547184c44cb4a59e6d06476. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/UKG241800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ee16e9f86582cd670380f2f5e21c8e143c979147c0a2ae35e79ce0bd356d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab31630b91d3c3afcec6848329e44b0a749608dabea56c7e258d2ee60aa9159. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKG241700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33277871274db21aa528f5987ed45334431a68657771a60525bd20b5ae2fdae2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKG241800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c5776b6abaedc309e32bd5b3aef7f69dfc014e70a5e80e56f9be0c75fe8b4a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6171ea11675037af5064b81b7a4a65ee1413d4a12b43c038cc7e2cc06d48e62f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86281e6296ecfa3ea9213107cde04300cd427ffa4287fccb01a3f87a347e8ec2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/UKG241800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597c1dff4a44105acef05636c281556bb5c29fcd727d49ae91ddf5ddbab4ca31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab31630b91d3c3afcec6848329e44b0a749608dabea56c7e258d2ee60aa9159. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c4dcd865de9b57bc8627c13eb85717d86a7bd5ae5b2bd5810bd5861f02573. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/UKG241600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad673a3c8b1e64ddc45667f86c409d26ec349bc0f892911b912026cdb3021df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d8cca28145e28738dd2f18aa016d2353059c76bb2cb67a0e4eafc9652bddcb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UKG241600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc485db4f4d983907d6f29b5833b62385ef182402586e5915ab97a4d275e1c849. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKG241600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32578d634cefc228e560b22efbe8229abe56e08e04d20f754424e78f1db5222. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKG241600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed8064f9a28c691a9776bcb4305eea8dc105645ad68f12a3d7784b0a832385f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKG241600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d8cca28145e28738dd2f18aa016d2353059c76bb2cb67a0e4eafc9652bddcb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/UKG241600001.