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 0x92ce8407927b47d15be76643f781a68baf68f121b9d49c472a0d4cbd23ed1ea0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/612308d9-7ee8-4b88-a3f6-1f186e538ce4.json and https://artists.proofprofile.net/proofs/artist/612308d9-7ee8-4b88-a3f6-1f186e538ce4.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 0x20615337e5735a2242bc4b005c224a5ef28bb0c5fabc65ea37a0d221d33576fe. 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/FRX201780586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c74ba90f7c3dea2a82b0c18f3a1379732d69003a6552ccfd65a2ebeee013f27. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX201780587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e66f9ef7cc430b1bccf1d121634f5c1fd4d1eb95f46d3562ffbac0d8730cd9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FRX201780591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7204d25b5befc8de15160e54c5d12f6a8d45faa267b50211ab72af0e9a804bfd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR10S1845194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d1b8dfb81025698fe77477072987e8477ee7eac921e79f03df6c866344afd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S1845199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69367d12037a232d994755c53b16ed4cb94e2b7c0c26416dfedcf06ff6d11dc3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR10S1845201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8468bfedc7eecb7632f872e5351c2991d5ca4579ab3b774c81029fff6953d816. 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/FR10S1845206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e164c4f3a107d233b0a7487ecc93c595c38f7bfd7053dcaa99089b589112e7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR10S1845207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e0f42d381ae46b7c733a85aa433b6cdd35e9ee8b19b032c94845a417cb24e7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR10S1845210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6b6bd8f0d333f5b170244fc2b598a222283dbc1457f2f942b898166146e146. 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/FR10S1845211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2dd97d9b54cb5ce526c3394074f1cd13a259dca8c29fab3663399aee4d5eaf. 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/FR10S1845212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0ef125f8955dbdfe891ba17a100e4f32fe257e8a94e8d68552d378589fdc9b. 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/FR10S1845214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc7bc427ff6a793c6a83fa5edc4dabfb09ca6ee18de840f3a6d056c21132bac. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR10S1843246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523b44f801379aa6748f8d19ce3042751f175d4cd3154d8d190c9e7aa200024e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S1843248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed0a6c9f4accac70207cf43d0550162fa796d508416fe3be39c0d85414ec25. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G1401610.