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 0x7ec8512432684db1de8d27833f45bd146bda45915774b264069d189b40c48698. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f2ca5d-77e9-4620-b401-6637672da7d0.json and https://artists.proofprofile.net/proofs/artist/b7f2ca5d-77e9-4620-b401-6637672da7d0.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 0x86d2b0cab0ec55981b8aa368c8849a63bc470212d62f88050f0de13ac3de69d9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEN2129479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f01953c4a9a63f357aca7f4be7d4cb311dbb5c383c10d32ea29407d06c953d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:54:16Z), 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/QZNWU2185792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5cf1f50d0603fe7d25f083a0b0ae18acafa767d527bea407ef2cd5b5522761. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWV2195992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7560f9f361b45c76a5e8621c443b871740248fad083d5beefeacd2e3210f2821. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:45:58Z), 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/QZES82270141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb63bffa8e88a7f87a3e198d372a81c257acf73d46acd0b0a7745571524a44b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWY2280980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb005cb07047dd0c302444fb3a5d50eb8c8626cc862128ddee5474bf09fb4149. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:31Z), 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/QZTB72225795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c803a2663d30ccd097a109b46f6e6542492390e230258fa8628908ab4f6db7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBA2217821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464eb55a4f6c037cd787081cebfae917090e3cbff6c0436511af1ab641c8fc3e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBA2217590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8634e0dfc12bd21f11ea252e9eff0a15a57343d1b3a4a3e9f4a3b43b23e27e45. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6K2308256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6aef828ed37f7f2efeaa50ff8fba6149f922056234aa433d4084309ffd3bd5. 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/QZHN72493865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deca4dd74637336d68d4bdd0726a68414c0ad79ddb8a800825cd605e3bfc919. 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/QZK6H2445354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd719671b39e13c1d4608e074db0e958d5d865e83447f2d76092eec5400f4eb1d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6F2495648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79de03db7fd64283ad00eefe039f2711c1a9331cf111f813a69cd82e2d5bcf. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWT2439450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dced3420233df578d48fb185d83e7c3b9d4fd433f21fd7fcfeea871138b3cd. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:43Z), 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/QZTB82463404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dd0e66927bc63dc36efb2c3ad8fc565282cdc5aa63d46a53e1487acbe1232d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZDA72565382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2943107db4ec30d81654d4cb4dc7b416af86cfc341c9b1948ebd35275e3fe1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:10:36Z), 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/QZTB32517159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeb09c4a2596d3bac074160fce5216fc0d8f01217ca0672814c00809914d59b. 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/QZTB32517160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de7a3c37e9929173f27a0d383034d5e98e2b8b1c761335e3e4a8c6ab298cae. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB32517161.