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 0x081ed670dc4aedbe5d885a44b0b3fa0b33d9bf2a59d84c4404a2394f2323d44f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43265ecb-1d21-4a34-ba60-3f820eae590f.json and https://artists.proofprofile.net/proofs/artist/43265ecb-1d21-4a34-ba60-3f820eae590f.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 0x44327b32bbe3ff2782fbcff01fc5f9f33292bf9697f16ca73ff1e2de161ffb46. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:31:47Z), 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/QZK6J2279502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0faf2ab2ded10a15b3b79ce031f0c8c6512cea0e3bb82c53bd906e39fa503b0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMEM2214826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9db0b0d16f47055f9e169a721e115e37861103b0e0734c3d5fdb8d0d5ed72. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:13Z), 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/QZNWY2239770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27124ea3c2db3437f79b19e6479bbcf4bc83545beea00da85185f434198b5bf0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWY2239773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e874e757b222554e2443894c3fdd509f40b793b6f98761755e3cf207156ed. 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/QZNWY2239774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97b8dcc2b44cc815c2749356af80181e14a9718bbd9b2363f3b73544471293b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWY2239775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b42db887d17ae84c3b030266ef3f14b85d465bc4bc3a6956acff7f29658e2d. 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/QZHN52342159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189e66717a911ca9f9fc920389a056e595eb91967329cbee4931366296706b09. 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/QZNWY2317792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2ff17d9423e635d97f73db1096f6ec27fbd72e6014354663bead0d3b4ba69e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:44:58Z), 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/QZTB82329267.