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 0x68327532c39177996dbb7c1b735f4d7e83bc6a39f89f8a87331e6ebefbfdaf8f. 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/72f6e3f9-f5c7-4fc4-81ef-69ecf6eaffd7.json and https://artists.proofprofile.net/proofs/artist/72f6e3f9-f5c7-4fc4-81ef-69ecf6eaffd7.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 0x31e3b9f41f59f934c90944591fb58c0207631ff5a7aee8104d0cd52bf0b2002c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:45:10Z), 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/QZES52539936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cad7838b58539645a0e1715ea439e2eeafb29b446d04b841c9062cd6135df2c. 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/QZHNC2532374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4911e36bb3d31002b97cda531988db1b534fc161b83fde41a63305be9255594b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:48:03Z), 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/QZK6N2510356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576a6efa35499f6f7c1cdaae83969d3bf5563b7ba2fc911a2312998042d3b077. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZK6L2558429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ee75b3f28703bba4fa35c90f9e7b5e9b51c89f06291a9e829214e8cf6a026. 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/QZWFE2519928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a84d76d760521680c1a4e91004808d1ef9ff90635447897457d00e439d78b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFV2546754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0574412075d4adfe03105fff15cfb19db67b3b021b688ed417f4b887f61a1c0. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7Q2511028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e54d85209b7e1138da37a570534e08b3e379ddae4bc324b414b150fa994dd50. 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/QZZ7P2595076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023139b8a89d9d8030b0be80b5a79de97798129a67205b95ab87c784123ef278. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:46Z), 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/QT3EY2521537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5069955b628a045424ae76ae045262e15b69c963b6f600f97533c13fcb66ba6. 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/QZZ7K2524026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e9f770f870693cd4de098be7fcae323d7a0d1fd87195e6015e96f4eda2445. 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/QT3F72557046.