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 0x9db3145ee761374d2b2a82a8910ee192c84af63e8d2c19d0a30691c89c659a07. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d8e670-3b46-4bad-ad8e-046f5d24abcb.json and https://artists.proofprofile.net/proofs/artist/e1d8e670-3b46-4bad-ad8e-046f5d24abcb.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 0x5e972865bf0b1b0b4c0b13860913cee129b09fd7e1dc89a21dbaac07cb4bc18a. 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/CA3HQ2125002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b776cde1e11592dea19d91d19e8ee8c0b8b69e04dde7534fa5a81fb8b98fb0. 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/CA3HQ2125003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3bfabdf0a9aba0f8b0d90c75a87d26ab98c4caa14d00ede5a302436fd6b5af. 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/CA3HQ2125005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c010daad5c1c34a3515deeed5d97d0cdba04db7c127e6f853baf3e44c8a8123. 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/CA3HQ2125010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ef07abed82adb5d9384b399e4d643a30847afd15433e12199e32f677b46f10. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA3HQ2125001.
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 0x537c4ece3a82acb74c7bf18da1d8b7970805125b2502deeee38884377c86061b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA3HQ2125004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6246d15ce476e2c36b34b3891530ac23beb86cc66ca759aed2a463b37ad63d5a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CA3HQ2125006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89562576ab1e2a0d23451e3bb608d6e65e5f052a1c9f350a7d6b3e594293a45a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA3HQ2125007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4ab31e1678ea6e45b16d171d05fff1bc8bd7d8f7309f2be7e0774d8fcaa76. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA3HQ2125008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b94f37bff72d77163e51db9b208207ec98204abdb6350ba8c021cc51d45eea0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA3HQ2125009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a243c8e6f804103958d819d53ca066c9827d12edd3be6d6c5411200f2c7e6d6. 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/CALO41400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23c88d8592ffcfb86ab8b9e69a7441805a5eab0af894a5e3e634ae2ec6740f5. 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/CALO41400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd84736ef8efa24e0bec51d77a26e2fb98437e7dc12cb1e42887bd0f07078d92. 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/CALO41400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e66b3da74aa0efebaf39c5702094eb30a197d1f5ce16413860e796e9b49382b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CALO41400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b34ec9635afd873bb37d9853ee022ff1ac010321ea14265a3fcb36d4e0b02. 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/CALO41400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb608cbbb5afd672fe95b2f090b5da08f236e617916d97657c7808b370d051258. 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/CALO41400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b3550451bd8bdf5f1d8a22a571660345b0453d608e394d421448bb04853697. 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/CALO41400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a6885e831df6d939ea140302d0ddc731dd09d9b61f57a5a005a88b98a02fb4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CALO41400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcdf1eb5b3e815fddbdb46a1f632386d78eb6c3ebc14321d7b57ee999f52680. 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/CALO41400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7858d96aeaf140aaa961bbfa05c1b84f1d48dc90399f43121c8a6f2ac04abed. 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/CALO41400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f569fa5ccb86be8a8359e82b7e2df466cabf9d67fa8d14489820a7daf6dc12. 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/CALO41400032.