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 0x15efb664287c33ebaaffdd13299a7ab912845414e0e1bf704237991f46ebd08b. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7ec634e-d4dd-46e8-9499-5f0a922ee7dc.json and https://artists.proofprofile.net/proofs/artist/d7ec634e-d4dd-46e8-9499-5f0a922ee7dc.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 0x2ef8160e00a8bee818cdc1b08586d619d4474ba2c073c112c51d1a37b5685adf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKHKA2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a28910e24793ae8d29f7c00c13cf565df655c7b6cb8e11bca424423ef306d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKHKA2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0169cfcfbbbc04d80e98726e4e10b0abef6e9c793ec2aef13815e39362304a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKHKA2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c61a90cb1ac55c303c96aeaea986d4800bc829cf6c2fb95850f0418ac1b1a2e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKHKA2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ce8a64b2408d713077f2fb15b4c026bd565d0a5725892a2006ab441871c14. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKHKA2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098bb80db05d8a2137067ec72a3ba67c99050160b73815294bd2a9fd44136566. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKHKA2200001.
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 0x1cc0068bfecd3e1dd4bf53344cb11d722833dc8ece8ace096210b248d21f6894. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKHKA2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2665b0a486e85523a66d7fe1cc8e79ee476ba02febbf0359c754b4058d67e6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/UKHKA2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dcea9214a130abebf806f99899a9a0e89c422a21d09ed38a81438ac0977a56. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UKHKA2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11adb2ee8973dabb0af15d1d5a240475ea7f1f2eb647749f07a218466bcfad42. 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/UKHKA2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc3f1110374328d90c587d6ab9a3fbf8cbbdb22af10e47b599fbcd7223f396. 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/UKHKA2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80034c8890247feea5bd5bc80a0e53c708da2474469d82af684ecfd4f4d9e8a4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKHKA1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68289d7d741080902e05354e39fe786537aef81ca277679903b813a4199a1c2. 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/UKHKA1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ed1f5816f597c68f4663c1835144c89340342546e72e2ed7df5428e488d0f. 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/UKHKA1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc63b3478815aacd77790c68cb6e0f1e11e5e9c2e3cc7ad7ab3425c57698aaff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKHKA1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7bddd9e02201d5352334092e4036875b43afd7aa35d1d46a0ccaf76776bba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKHKA1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4896894e2e76962063d42c430266d6d9a3260260bcdb1b9ec462143423840d4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKHKA1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87531ae9ce5d63fc18d69530c2381909cb81154dcce7f6621fadd8b07ec76283. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKHKA1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4e0859f30eb01b9c9085591d6f3e8c171aecab94787ec626ab4d1468d6de7b. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/UKHKA1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021898c2a920310276d3bf429df0ca9b0ed2554c30ba31cd81bc8b09f4c9d5f6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKHKA1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb13995d015714acf267a66522d453c79db9aeb6b6836932329afd4216342b. 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/UKHKA1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980ab1ac0cef939c8af0688494163b8d24466be696cfe26577f954a74e5c4935. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKHKA1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eba3f506d93cff8ba17e4868fd744a374feebb36648d76a72c5d14d37769b4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/UKHKA1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf444dc7f67a093492b40bb9c2f6a3e8cb00250a955b5d59a2e2e0227359e8e04. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKHKA1900013.