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 0xdb7c2ff9c0310f272e7652900a14070b73a7b694c23468037a0479141c4f6b4d. 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/9a85ed42-8808-4db7-82c7-6e8237b27a69.json and https://artists.proofprofile.net/proofs/artist/9a85ed42-8808-4db7-82c7-6e8237b27a69.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 0xe3d6ce1087e3c9865d5f2c0bfbbdff58a9aaf6dd737f879a4bb1f51e5b2f0a60. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZRP52495488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d984927fcee662d3b85d299421a5e89b25c462deb933b2c9caa2c62643f8b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZRP42419550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d8205ba4863e20eb193529bb68e92023ba6a1deded1fd4749911539892243e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB22419915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd928b83afd2df68b288673ba1b7ac733ba63083af202ec52c5f1e9cc9fb0f2d2. 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/QZTB82474317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7f07b7132762a62dd9c855b650102e77466c560889b2ac3e658d5ceadffdc. 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/QZWFQ2464027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f847915f89232f1033c1a7ef8602913994838b81b97a465facdee446badba1. 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/QZZ762423915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ebcc11a7af6d19e72c3bd641865d879996dc463bc740cc27ca0bfd7c2eee33. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7M2455224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e1035a6515143a837606d6333b0b8fd688f6d8b4e6ef5d4581526faa1b44a7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZZ7M2455225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aab442935695da8ea835fdce7349c042282c5d641d2e997df60c0140a933582. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZK6N2514427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67da5d02beded429fabf3e531e50744302ab640b3427f97cb4a7fef71d7bc1. 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/QZK6N2514425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567bd6002f37552697f276a48f30cfe287758fd3bfcc9f065e3871af3c8f62e4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6N2514426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b1a29fa4320ee828e8d33bec29ad5d921704f9dc9b0868518c23f2b37959c4. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM6MZ2582848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa574f9b3e4b355fb57d3b40c002a60bc745afd509ed3bf183614b27a627c1ae. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6G2589049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d541477531d5854348dbc57aed694c2f78811cf49c8dfe93ecbd7fe6dc7c3b. 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/QZK6G2589050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbfff7aa145e4bb3a14e680e9feb9cf6a3b32e916f4769786f63f84eadb7339. 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/QZNWZ2501395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b1a9ef91b652e669549ea0e91f771994843d3fd79bd5e159386cd3342bb95a. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/QZTBA2541327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4988ee3f433b3ee04d2a129f24230d57a2b6c7dce542f193adfee24d3d53ca4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBA2541330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f50b17c4618da6edac907a05438ce2cbf91e6c99e9fe832b8bf738dd880d0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFJ2542140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11441d4d3af2b40bd9d7fe033f7c2ea7266481eb1238c565baacca4b6cb2d51d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZZ772557677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fddd64852f81bdaa57ed4820e8fda14cc253a2ed242e78d35917188b850cada. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7M2516134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2338d74617175a48f4fa93a624b3d2802b5ba5bd3916abbb24fdc9d75e441a7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZZ7M2516135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5478341b5a88075cdb2215c5ef6995d5cece613aa5ea407d6711ca59fd939118. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7M2516136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa138848697c3dcd1d98dfa4e1539aed30e9c7aab068df5c3e0e4d319d4e13e0d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT5M32582900.