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 0x332fb2982ecf9eccd55cdcab0a5cdec83f7a8f0f0425885d41ab3b136bdbf66f. 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/e83e3549-50dd-4721-bf59-ce4ca5a3364d.json and https://artists.proofprofile.net/proofs/artist/e83e3549-50dd-4721-bf59-ce4ca5a3364d.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 0xcf03bb9915123c33d183977891e8d404edad9cf3d2de9528531bf25b78caae55. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX8LD2438483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dd77aa2cb9d0172e8e2146f150cbb8ba629f2157afb09160d15c959d83c3b0. 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/QZFZ62484640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7659a827dbca3287dd56f04ebe03074d80d10bc3b816232b2031010bebd2b4bc. 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/QZNWR2455854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b13729c4be73b87a31327ea5a27de7b479461c88e6477cc3085f61717f810c1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFU2410695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1761944a34bd6b4b9ae0fa96199b7930e6995223788ffae65b8b02e8dcb5ea. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZZ772470513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af74124dfc762521a0d20ba131d52c628b7cd88bc320547552532c1ac1be9b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:24Z), 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/GXBDT2429852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a11294e1853c154c7cd90160aadd9c16cf78d1b005f87da04d8b8d87fd95deb. 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/GXBDT2453144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5819b8aaec6c04ec77a3ff26aeb4715ba764e917a8f8275b470db4ed0bc804e4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ7P2451760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9edaac3d56cb7548675f7d4db5f3f0f08a50ca31b49add967148b66351af5df. 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/GX8LE2524157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12c49d963d8d63a2b1d774c0bf5f6951c216db78718216a8487a9b020809223. 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/GX8LE2547836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5952f4bb0376a0eba7a6ec54aec207b19f326166c4b642cfa3b5a6c8a39b74b5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6M2588947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3144fdb2252a24f177d5cc120392926f2e82546a2e06bebc5e42aa9dc7bd0389. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNWV2595797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43eb287f81d7f7d41b7aa5a5ac38fbbe01059af5eb494d57be8aa04457bf3cd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZYD92500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf42a52d8708becc481f16e9a49dd991d528578c7ddc99172211f075362b045. 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/QZYD92500531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e48e23bcd6c31c05a97d0e426c80c66ddb7f012c949fda427aaebe985a1879. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZYD92500625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de5f86c18e2a62c550fd2778e8fabb16fa897fe32627b4ebd94b2e6244f2e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYY2455408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf011dd4cb7b04000e5196baf98997cbe4e886dd8b9064ddab4dd9f6c89ee169a. 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/QZWFP2382735.