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 0x1b087ca5ee788dabb814fdece7dcb3b609b480411c7bc16f2f784349e1f656b6. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eca190af-3cbb-4fdc-b88a-4b2adc76b4e2.json and https://artists.proofprofile.net/proofs/artist/eca190af-3cbb-4fdc-b88a-4b2adc76b4e2.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 0x3004467dc52fb047f65b46afd39b5bdd992e9fa252b5580a31b93ef1951f46a4. 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/AEA3A2083595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6fe2db14184fedeb575fdbf12ea7630cb7221b414e3246147d904e49a4f301. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/AEA3A2080912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee62a29b238e79aded146c2875799127722d2584f7b6188b8a7226bd76613e80. 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/AEA3A2056082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a29246bb733292491b57c4c45cb16f516ad1f7038e7543f133e8b545657ed0. 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/AEA3A2003228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897da48c2402f2c5b6c3b443cf8d83f634f6f1861e0bdb885cf49dcf6195a2bc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/AEA3A2054526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c6400771b5aa1e19a400f397f726a6574db83c940ebd6be9350fd547ae350. 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/AEA3A2032130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d7a46d627928c30c4baf902d97ccfa0c6fc62bd9dc72c60f08377ffb82a42a. 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/AEA3A2070756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9199d5cf5c42db5a01c3732b8735a4a46fef1fe3f7477344fb0f0282c27c981f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/AEA3A2095051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a23ac5dac23051271dc8a428ecb09fa6c1a8f047469839b03193fcd09fe2ea1. 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/AEA3A2047356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25c93c52a2446433d72d3345ff412892ce67fe83701fce6a0364717540518a2. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/AEA3A2050271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435bf0264e0d46cabf10573f58a2d161d968e62fb301fae7931d9a971ce160b3. 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/AEA3A2052334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2033bd486994d5ba56477a4fbc17d4573782c8bec1564678748637ed1c34c731. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AEA3A2050217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ebf8c83a7e8d1a1862b268137475c0aefb7f420379bd5005023678ff88ee77. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/AEA3A2001389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b332286ede39c9a0bae8ab36ae6b92b4f9941d76a0d870f77c15d1886d0a7d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AEA3A2063456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc6093eb1639de01dc501cdb57f2d72aa7e5dde732ace1cc45851f87b185d5. 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/AEA3A2011729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33493379197719b494e07af56be2382a2de276834ce283cd574472daeef97b03. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/AEA3A2083797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efccc23b2dee7052fb89af6f1d3329581128850cd3f215e7bea84c6e2e84a20. 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/AEA3A2060583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeb2fb53ec9a6b78f7535519a37adb12c1153e7f4b8c460bc2cfe0ba92b2364. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/AEA3A2041887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5a2de14eecadfde8dd1fd0e25dedbd21571abebbe583b06980fd7a75899f61. 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/AEA3A2023708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0ba5c03017d59d1d68df810601de52463c634407004078fcae552f3a41d918. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/AEA3A2020519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a7209107f4ee159816ce4b4902b46d86da73a30d3d60dae98d36b09b52de8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/AEA3A2011710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cbfd3be3b6a95f0d1e82e3c198ed04a0ec0721d34abfeea4ed506974f56583. 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/AEA3A2052045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31a4468ddf41a738a0ebdaa880bf4898552f412a6f67c57f673cfc8aed3c019. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/AEA3A2027306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2cc05d146281244a84a48fa09c9484883bf992cc740607a15a109e71cfe24. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/AEA3A2021399.