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 0xfe4825f3bd3e29161f14f410d507ad7258280530bd9f89a035622626a38fbfda. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd5dbf9b-4edd-4756-8e2d-9ac81097453e.json and https://artists.proofprofile.net/proofs/artist/bd5dbf9b-4edd-4756-8e2d-9ac81097453e.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 0x148c696358471eb0d800c0d80aaef1d2f53df098d8b27d44f2ab3badcefca7b6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZW9M2230705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee109002ef589728633c45ee99f849a8a17a9cc7c0511b4837aecca476d78ea. 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/BKU642300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a92db81693d4479bcbd367f9438dfe088581038ba6414fba168585524d871fd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BKU642400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3e49b645345885c54b6fa655024dc4c481193b0aefbda67e78531ed74f5163. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BKU642400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915ca0a745220b510e27628b5c05f12b343306c52aa00e76ed203e79f227d30d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:04Z), 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/BKU642400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22499cd1e26b6b0300061ce7a6309003fc46f83d5b08036bd102a8be03a1485. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:58:51Z), 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/BKU642400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adbd259ed042b6a1ef65407c0d266f46e7d3197d6d0a8b6816d16ea7c90b363. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BKU642500001.