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 0x2c2e8957462b6fc50a882fae5557b8b30a25ca50416a327200db1ee92d7b645f. 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/8412d449-3e20-44a1-adde-64d8365a173b.json and https://artists.proofprofile.net/proofs/artist/8412d449-3e20-44a1-adde-64d8365a173b.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 0xefce7b081bcad84162f4d2ec586651e2a4f441aef91dc12844d7e71958fcfb48. 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/QZTAY2223395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be24be2e46f3d4a3d424a3ac61bdbf28529eb5f582e8082d7684566bddb778. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:30Z), 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/QZHN72394885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b1478f50944754d0b0bc8f31f0a0281fdca2195efabf2850ec6391b3b6609c. 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/QZNWZ2380240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c794fa199238c7d512738960df9d8da1cd5fd077079f55fe53499ea01f3eccb. 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/QZRP42349121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedca797f478fd63c1365a140b9d276265dfb7789179205bd8936d876b66799d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTBB2371274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6d85974a52aeb58b9fc47cc67f41bab1b1c3a3be6a6cc330b41d0461504306. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:02:48Z), 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/QZWFK2355443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff6eeceaefcec5137cf429e6dd11107c628277e803fa912e68c7700385f1c55. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62422207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2eb48a775fef25adb2b66005b9652c2ff035ee72b043071809b6f7b6e9b8b2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:58:20Z), 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/QZHN62481689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487981ef2922ac9514020b4195dc6aee8bc96ac68aacbc0d5eea617f53c2c29f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:52Z), 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/QZK6F2587546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdff042e411cb999eae56bc6b5ea9dc981fab8a20879431cc6aff2f26d11c61. 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/QZNWU2507657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870a820b9e8a8b9b62c4f54ac20c8866db32ca2a51045031bbcd0eb2e30fb678. 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/QZTAX2574437.