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 0xe067c6762d6670f2a398f3d7c411f3717ecb997fcededa4f892041df403f704e. 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/35e47689-8ff4-4df8-94d3-cd02d83bfe8f.json and https://artists.proofprofile.net/proofs/artist/35e47689-8ff4-4df8-94d3-cd02d83bfe8f.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 0x0157090663dbfa705409cab91f4f028750283dc81848cd2d28f6f946f08d6a0b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:40:53Z), 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/QZW9L2497107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32485896397e0b1898533506fe2e1e803b5b809a60926dfd7dd4683a685d3afe. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZW9L2497118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db37ae6e066e7e1625790e8e09f60ae27d96a4e4bdb4f18bf398052821ff0e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:16Z), 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/US7VG2578504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad24c235585e546fb21aa8708ca9509606162a239b520b237183c131a40c4bd. 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/US7VG2578505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533a67c0821268a411bd7aedf60a376e3ee4cce35a14823f65d13dc45a58781b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:55:26Z), 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/US7VG2578506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260e81c4efbb88785015344dcbb382875ef1345524705f4cf33be577f2c28976. 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/US7VG2578508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732a60a101f05f4ec62bd5273c3f2774ade39736a80f20d84d871b37a986d56e. 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/US7VG2578509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb4b1651efab7bbc04ad167383f050b3bda304bd50968c1fac6c22da49fef71. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG2578511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355cadbf5892e85d61dd673f193cc925b9c17975bcd03b69430cac87a2e2fdb6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US7VG2578513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc929d19ae5644be980fa60e0250a2e23cfb36c17ac6fa438a1212ccea1cc52af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLZJ2515129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6e2c38bea65cc2838ee770864b036a8504f6225da5f08051086cff16c5be70. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USLZJ2515145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367de2d20ab67bc19cbe9092a3cc3db1e20a994a040f99a41c6374cb924f4365. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USLZJ2515159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f9c6c25a489a964869ce8e5dab89d902d7befa0c39cbf0ba2a23b0aed5fde. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZGLS2596033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1386db5c512250adcc0e0e87d52306cfa8ef7739ed228ec26dd3bab03a29a226. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLS2596034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0a535d0600d080937331c4b4f1c8b02b46a37206b3e7c1a6af6767c8b532eb. 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/QZGLS2596035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0a129db55248e5cbf2943fff1b24fb8fd8e64fb1d855ba1966ffd575aaeb29. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGLS2596036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ffb7d6db613b6a57ed40c9c788f3c4404804b7210117e3873ca999d52ded3b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS2596037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea8de24f5f3a74ff614986fb4cb601166b5e9f14f76b3c946add3b5e1634d14. 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/QZGLS2596038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f44dd7de36947590c7c7a7aff730765290a2071984ed3da35b9606ae81f2e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZGLS2596039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b3cd4e7d5fe30309c46cd9fa6fad30d43b05491acf9f371f8651b05cda4321. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:18:02Z), 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/QZGLS2596040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48888210989bd3de0cf9e55562ac8d589194251ea75b33b4ac89e565e89002d2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZGLS2596041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e00cef83273291f3f548656cae65b8d35037abb968cbfa20e493c3615e2e19. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:11Z), 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/QZGLS2596042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2891070d3679696d3050293142b1751e845ae43380ba1ebfd1876bbb9a4a93. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZGLS2596043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c2991f1be597e5fc5133872fda3133af28224abbb5f6e9b6fe5e739e5c1b20. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZGLS2596044.