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 0xf5ab2b7c6d4f507f0e275ded088a1821e61f2e10ae9d4ba89d61e9d307a40346. 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/2f41e751-8613-4e2e-921e-56a223d195b7.json and https://artists.proofprofile.net/proofs/artist/2f41e751-8613-4e2e-921e-56a223d195b7.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 0xdade9d8f21713e451e371991db0eefafe97093d313dd6f7d9d68968767f00887. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM21332820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ec16553a18c85b727f8078d6e5b83ab4b560cbad1f6a77e4a0a3476a53ae4e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:18:41Z), 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/USHM21327749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9181932e11ba808db8d51f35e94a5cb55afdffe56fa42a495638f217c1ca1508. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM21327754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a2329e3e14c02df727a1389e44d7241f0170ccb6bd3dc65701e3801fe58e24. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:27Z), 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/USHM21344374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31148a132bac276b1b114a3d75c5262d8f77fbcbd8f81388618c861c4bd6c77. 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/USHM21344376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015507253a35859cfdabb03685977cc1b8fd7d398625d13db138b72da602d6f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:56Z), 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/USHM21344380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac5212afa540fc690c8d31be901a4763880d25b8d20293933b7c949a80b6ee8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM21326887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1341482b3de94cc5c5f38a646fb3c4c7fcb0eddee3686ae59ff37e6146a8f140. 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/USHM21326890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a316c1b03e60dd1338570f458b5b7c3dfe8aa2f4d8eeb817c76c5e9cf317cae. 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/USHM21326891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ba37a20b609cde97cacb13d016dd7c1fee3f7549ed6df841b32c349d198961. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USHM21326895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724f2d00231bffc34c644ac10251209223ed18de4e5b7951031945b629d0a70f. 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/USHM21326897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa4b679f5a106a0abde8eb74cf95628317937f83269fd41aa66cd4bc3005651. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM21330037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5499f9feb690189468f815399a68e831c0e67abc8754dde4ea511193625473ea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM21300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7c3dc6cca5c74c33fd28836a6635b18dac5fb5307c1a74dd6c053af10e841b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:59Z), 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/USHM21300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0267606a590dd1f8ed3ffe4ffe8a259e947bace488d4b6156d4fd8ca2dc0b411. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:43Z), 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/USHM21300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c4db8bbc3b81045141c68794ae3bfcc334b1ab2b0fdd0dec3d76540f98d93c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:44Z), 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/USCGH2334159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b79cb0d233493cd7d9a09fd7fcf0f60c83e39be416f2a70d195bf1a116674. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGH2334165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf77d485b1685c2c8d0d99f9562b05d51220cfc4304d72fb0b93d618df4375e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USCGH2334166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c85cec0934d1895f385fb81ee430178291d9dc5e2bfba17f1b26792f4f4a50. 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/QZANL1742097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc707bb9e7152e4e4d9d1dc27895bfae658447b27c27da32aee906f179ca31828. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZANL1742101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b3f5c13964d1282762361493ba9f1da2635ff87ed3fd391a95b2cced37ab6f. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZANL1742103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab04e156a01d0af450fe32a550535c2fec1c2e960fdad5c5e810a12892c49372. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:38:44Z), 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/QZHN92038151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05989adc69fe7901706568edea0d6e09a4cd2e49ba18dc39f4340af5c295b130. 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/QZHN92038156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e07bab3e5f5c69e64ca7655da765b890d16fb8248e8011c80005f7304637da. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHN92038157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812d4ec4517290ad4c46d4926e9dab3182e8d21b5a1c55c147f191eabdded951. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHN92038158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bf9ca2800b6adbee9aa997afe37e96b04fb8b0366d7e5b4f7051ca801701ff. 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/USCGJ2342640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab25a063aa2b4d6d26e16c64f18aa9f9bb416d0d893e7b1355b123137b66e900. 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/USCGJ2342642.