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 0xd06045dc4dbec91b99389a4264df74abc146aa8e0553077bc565ec58df5e65c4. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afeed117-30d0-467c-bf14-3e6783c8a13a.json and https://artists.proofprofile.net/proofs/artist/afeed117-30d0-467c-bf14-3e6783c8a13a.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 0xe9d44a53f88b6f1479a77e88a32c3b074fdcdad33083a369a98903c79042231d. 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/QZFYW2084775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea94a033122b6fe596bd55c1528208253fca2386381a6cbbe3191011e10a1e. 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/QZDA71899753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fed16926eaa3455005a19ee280f75ac339d7a2dbf7b719c3ca2e73766500a60. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZDA81827417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f82537f7a52da5f81fed38bede2c67668fd97fe34fc89b5b70bb03ebd2a00d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:21:49Z), 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/QZDA81828438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e78a45c3d268466b2f1798afde1198365cc86115c47d30f84854a8e56ac25b. 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/QM2PV1826871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7189b382291bff153982e5d1f9bbf0942d6c416a2df234464643b45d053cfa8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES91875952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c415dddc45533c878cdb8d1275a6d8d357e56bb59f2f2179dfbfec2f47b02ed. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES71967065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46d3ca96095674b4df6d5f5d5669709466bfbd59352d7842ff125ad2cbf97d7. 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/QZHNA2100816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db7aea7c24c252ff20999409529d03d7bcb862f80d4f8d8b6c77cc0d1cc12b9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6G2204203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49efc621516f93a74e9bde82e2c012acd4f26314e0cf2b804c7386cd2d52728c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEM2259891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f83fa8500c48a1d8c1228c94ef0a118757493c7fc90f2c52ec32b583945e30d. 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/QZWFN2369481.