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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c20f85ab5c887f5709c8bb22ddbe6e7e32dace60080585640fe4548358b8d1. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a8d0708-cca4-4e4b-aed5-2e9330ff559f.json and https://artists.proofprofile.net/proofs/artist/3a8d0708-cca4-4e4b-aed5-2e9330ff559f.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44248e3ede377a300514f1a1d0a0533a2783d2609d86adbe99e051cf065ad7e3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEXO52431446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b54b99bb206c9bc32c9ea801213cc30b0f7a39587b0a2770370721ed216b33. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEXO52431447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f16b0e39f51ec306514911f186989cde684d1c65b0a6b858318b3eab86c19b9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEXO52431448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6710d27d40c76fa40eb65ef6e71c000bbbcf59a8c26a5fee2a555aa8e87b159. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEXO52431449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5555047531c4d29fe232edc423cc13a3eebc92fcea298bce946e74bfca3d603d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEXO52431450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b018f7b4a520ecd15b6bdd92a747258522653025e9eafeb93e3c3008d2df9. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/DEXO52431451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc48c77d0e79b18b2fa209e426ef689bef16f536bf8aed40a99066332314e82. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEXO52431452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418e7eb80acf6e91b1dd1fa6f6c4979673efb9d507dcb8be337317747e1f8609. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEXO52431453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8bb81bc00f89414ba8c11080a349ab39f6ebab1e6f3c3b6271538aca23dd29. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEXO52431454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55180581d7fdc59810cfc66ca32c74d337fb345ecf37e15357a9cc610d317b0b. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEXO52431455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5245d0474a1ea2ba65aef0fb34164cd2131b6b110744351b028dc0ae957862. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEXO52431456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c1eb328242540a44239ed2676db311143d31deab481ecd4fabe2a9b393e5d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEXO52431457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8143c621b435e6a772df92b7300a22e85f63316fbc05d3c15c7fdf1402495645. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEXO52431458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2094fc298b99c857586262491a2304536ab472196a19448a089b149b8712e90. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEXO52431459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cfc825ed59c9a3601305edbdc092b6f0c45aec825fa88039508859f5682fe9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEXO52431460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b9162612a49f36e00a6e86fdbed5d2fbf42228527292f0108e1fc521d50ea9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEXO52431461.