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 0xf2f5b6881f06b26559489cd1bb7f93c74a12694910a92d848c7f46542ff3e10b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d11bd8e1-58bd-43d4-98d6-cfcb275c838f.json and https://artists.proofprofile.net/proofs/artist/d11bd8e1-58bd-43d4-98d6-cfcb275c838f.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 0xbec7b42cb575569899a8bf8cd57e6d8a7d7cf1656ca4a0b35ac4679f88343ad4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES51917109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8862c7218ce466f6fd89df0f1b58b2c2b3f3d0f7ad752135cbe74b64e2702. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES91995622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f96812ffc41dec18db5a2c3b6668fb2c83d2be7fba775c25dd86136685ab5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:38:42Z), 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/QZHN41979412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e317399759e143048b558f1d475cf1feb96426241b5fdbf1b3254a8887c34. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA61990715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f87ac0ee28cd421b165a370400bdc5209bbb3c08739ce6f21d12e10a6aad1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IL5842132874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cc4812037063ac16f9f0481e875f6508d91bf37d6410b4003ff57d3d014d71. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:20Z), 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/IL5842341938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6303303112d62c32501c1601f298f1dd7c72d7a08269cd108fda5c9b3acbbb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IL5842342440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566083ea13725056e795be6ce7dfadbabecf1b4d03c27c6977c868da8a8b0912. 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/IL5842447179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6d618205eb5320adf02e8ec3e6652f379a2e16d508bb0df31ceccb93eb0618. 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/IL5842447180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6303303112d62c32501c1601f298f1dd7c72d7a08269cd108fda5c9b3acbbb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL5842342440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b371db0fe1b15346a961093742395effaefa0c65087759e37700126063726b3. 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/IL5842447181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdff277b471881ec6ef57990934eeb1de3e030303da828d61412b3542e6d933b. 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/IL5842447182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b65827d3ba20a672404a52afe935656cebd96752f53596268df46b9c02a0d2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IL5842447183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd453b261717e230918002b99e9b50f71690f0f9a1c14214a330f22ef62b66513. 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/IL5842447184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac04f44618624a8244e3af84a1470727c036a34dff354609c34f847d6e07f6d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IL5842447185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5904088237aadc66a017f141bfa631b6b46af179892a53cd1fe013fff4ee6eba. 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/IL5842447186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09e13fe6321b906ccdcd4cc8a3982b2597285549bab30d5e43ec6228778a796. 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/IL5842447187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800b687334178ce8391849a5484ce1ac98141cc4fd749f96af4a773d0cf92502. 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/IL5842447188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e3a9dd5c2aea6e358d347948f60ee0e94630ac15edd4dbc9960f8db7118308. 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/IL5842134657.