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 0xd92575e15b450a7353b587b5e18e39db99b4cadc50d309b79f52983f4bc1d21a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0023030b-fd6f-47d3-8849-6187fb9f31b7.json and https://artists.proofprofile.net/proofs/artist/0023030b-fd6f-47d3-8849-6187fb9f31b7.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 0x0515a05c6ea6bcacad631d51b4558aa45719f14e380b6b8d985de265ba130421. 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/TCAGG2265631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8709c29d81cac5440a835a35567df86a4219fd74186d36c5792d7ae76f69f612. 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/TCAIJ2464197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66b033fb622d310db54b8704b6b1f861300efc0a311cbf89c46d858b9cad500. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/TCAIP2475934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429413e799fa18f7b9d5e68672ab68858152d23c8151c73cb227936d083abf5. 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/TCAIP2483838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20ead99fde5587e85f57c2ffb3165138a6bdefe0493c1dc91d9fb73895257c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAIP2483903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290847e9c497cf02bedf87690ae800180e753b2589cc5c7120e030bcbe9f5375. 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/TCAIP2484106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27eb28b62859cd4323d7af9e38f26ca7ec63b5342f7dfb44f68622122bb11308. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIP2484152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de7ea559d3e17293467c4ebb3d6cc8fc11b6707c5c65b12f43d1828c4b4bb69. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:01Z), 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/FR9W12467002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7661ba83a5a91c5b67555da37aa76d57ffbbd4b255011061192eb72d1f110ce1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:42:35Z), 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/FR9W12504491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d278b01f8ab5778abb61d8eaa593aa37303045427eba78315fca2295e4a7ea. 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/FR9W12516349.