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 0x6ba6575f45bf0b2e986dbfe0d2ddd3066be07ed6fdce14b4ea383bb528bb1e1a. 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/44e26461-b58d-4aa9-a884-5a69a1f4a885.json and https://artists.proofprofile.net/proofs/artist/44e26461-b58d-4aa9-a884-5a69a1f4a885.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 0x905d4f4485e36d8b5969a8eb5b8c1e8cfbd1f0587933de5842fef5ef6c22d559. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:54:52Z), 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/GBSMU9330100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978a9db2cfca5c856814a432f5471573ff559ea61efaa81f19948252c8e41ab. 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/GBSMU9330102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148fea03c8528f5f417cccdab2ad241f82f6a2bdd3dcc1c8848512eb84b8ab20. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:22Z), 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/GBSMU9330107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0623164c2de541a462e79b976a6dff68727338781e541581dce63f42195d75b. 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/GBSMU9354878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cdab105dccbf106eaf2b871bcc08c50a770c1d9a1d71d9f53a5a7579e49cc9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:45Z), 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/GBSMU9354879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88776e306d43c9a24e803ef56acd1cd80cc9cfa1095f953577c9549917128326. 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/GBSMU9354883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637e38cddafd79a6c55459f7705742323be43eb25ed3175e21ae8ac6fe85b8be. 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/GBSMU9347776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf19f2cbcffd2d325febbfd02db9aea88af02b009efea7d0dfaa3459e00da354. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:08Z), 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/GBSMU9347777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2cd1f26ef70901ac9010127d6df6e5a4e06e24672acdd29a109ee92963ac1e. 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/GBSMU9347779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217b141c1c681b315d7720a43cd757640d2b7ab6c52e163087115d8c43ba2fb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBSMU9347780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443c14eda10c85bc153ada1c549cffa5236b924a2ef6b8fac2d09b2fe813776. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU9347781.