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 0xdc71aa4cecdc5c37227727715d30ad562d70d26ff5959ae17f7bb203b263d240. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cddb5d6-945d-40d4-ac71-484e1a6b338c.json and https://artists.proofprofile.net/proofs/artist/9cddb5d6-945d-40d4-ac71-484e1a6b338c.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 0x59e1677cf5dd273108660a11980d98df262d5f0c3f43c6430ba837f0d8ec54d8. 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/QZES72158056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3d749f07c588e47a329248879a35fa1b3d1a133f2499113f5d4d6953324a23. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZFZ42252861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f28e64e944eda7fd10cdf02923a1c981a1854fa7c68e1206793aa56232a3d78. 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/QZDA82210518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f031e584459739a46fbc3f248baf5006fd72f4b61e47bc45ecae8565728ea5f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES72292214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45952a3b3076cb7873255544a442fa7cf5a17bda6a91b228f1b0359cdf18f35. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/QZK6M2256417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d011192ab2a95b62f355a42a600164c5b114e82fdd47d3f2cb94003abf8a3b0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWY2493428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a8736c9003100f26843976237d9642c431d15f9ef9353c34791d1c39e23722. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5XG2445071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b692f4a3de46f1958d1cebaa1b1f2c1fb72c67e657f514fd6e79e13ac1b8211. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5XG2449011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf668cfcb37eb8f7ca4461e35e94356aa1dba7236faea7fe19caa0f4b22b3d094. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:00Z), 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/TCAJE2578680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b41e31112dbd4dcd9d64e5de57418a3773e6583aaaf01cc97ffcc24f29acaac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJQ2557459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf668cfcb37eb8f7ca4461e35e94356aa1dba7236faea7fe19caa0f4b22b3d094. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAJE2578680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb55f020a07e8976968a950859e10717559c3bf6d2b5f6f17d7f656050252d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:54Z), 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/TCAJP2557481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ad6899f39d42a31aeb1190f51964a7ddb6dcedc8499ee060b6f007446e69b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJP2557492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96dde479d1367bbe494aca6fcd1f39c2a3c830ed41ca1ccb1a2cb68b57875a1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJP2557497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fbad300553968fd7cfe27d7fe5a344c3480f2bd1d112026a0b41071e3d9fec. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/TCAJP2557504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de482dd65bf612f79683f6075d5dd1dc66a596b0ba28dbf0d39671ef1709da5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:53Z), 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/TCAJQ2557514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b33ef3760fbff189149b67b4ca36fc42fc8834506c8565849115a258823616c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAJP2557525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c21039f3c404b6fc17964918948ee42f9eeb134ad3af04b0de8193e41131fe9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:11Z), 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/TCAJP2557534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd078c1220a46b83bf62f69b1cf32e1660e6f3f5dd8a8614a19950e70b16cbe50. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJP2557552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d33bae5bab9f8b2f97fbae82312c4ee5b4c6abcd7fa8f4f684b443b9d8cad31. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJT2527863.