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 0xa48c0600eeb329f7157e9da5c645708f4590b5c2aeda0df8c3893dc53c70a443. 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/a3b0016c-6b70-4011-83cf-9d95ac63132e.json and https://artists.proofprofile.net/proofs/artist/a3b0016c-6b70-4011-83cf-9d95ac63132e.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 0x08326836b90f4b6a2b47e5bf98c24a8aba24233502bb6558d58e8a05ca4149f7. 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/TCAGM2216356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe29c85b39b664e0dbbae0f0d4eae6cc69a5e734b8cf868af5960cdc203bb9f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAGN2279529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c217e2b01655752a68d034cb31dd73e0f7e1c5ea02faaa0063f1df4ff31385. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGP2267449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd0987ea08807c7866e1eebfea91866c7f0de0f88d967273b3983dcbae4dd14. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGR2265656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcdb848a408d848d9157cc9aebceafd73f61ef372d3648de88728077995bb88. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHC2379952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25090757709c63d16e99ee977a63a2d22d6b66d72d528d847ae9ec8fb46f6bd. 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/TCAHF2356863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526fcd47bba91564630aa895c0ac378ac4cf2e0d50bb78a6f6643d953486c439. 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/TCAHJ2308365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e023f65c9e2d55c4ab5a853c380f3ce0066dad2ffd0fb8999960736917f3cb6. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAHK2341752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269f142dae9460a6dbda4448bb61b1f7e9b1232d64f82c2b1f7cd5181a00575f. 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/TCAHL2311095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64b8dc7b24dfd1ba54532e239d1aa81ec62b2ed4b77c7c310c11dce7d30f31. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAHO2326665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db641ce1edef3a78c625db222ad59bdc014b6664ce4cd52f461e713bcfc030. 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/TCAHR2398752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec5492f74cb910dca5db28b93d4b1b1fe1e9f680fccab64fa64aeca343447f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAHX2478212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb355fa17139bc5d48377e8466618487c9d6a205bb20288a231e05ff8b3393b. 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/TCAIE2450022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe046fa9006f65e01c88bbe17055bb2d6fc474726f5a2aa95498d0912da145df0. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAIH2402872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82a5c125da8f9f892cd35e180a03b225598b5016c519616f987e6093102edd7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM7282437658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103ba7765ad96ed7fede31907ed1b97f4a58d89f671237a03a6c17e5fe02055f. 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/QM7282437661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2d83b5982bb8a00d40d76f59ffaf8e12ed7263026a8a92da4ec7612b757538. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAIQ2412352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67140084c34b8b3155d0bf30a75974957f7b3e1c6978997459de54848c9efabb. 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/TCAIY2454495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662bd3d3ec1c5ef4d3420c6da6de6ec8f3aab0f118adb5176259992f7f1abf0a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAIW2446643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a08809356466d7622cf70a1f4f18612adc5a26e00adc706727a7156d6ad3ee. 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/TCAIW2446648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e530c98464d5fdbfe6e84bebb05505affa941bcbb3b2a26e6363cfd437df290. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAJF2552558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880898c4a856c730595c4eb700546f06745b51fb20dd44fe8294b1009474a78e. 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/TCAJH2543805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e13bfae505308ce337d8262b020b56e0205b1ef523c880a43591ce3ef895ac. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAJG2543808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eb3340d9ac1d4a0c367d1b09026850132ea4f2581a509bdc7ff782a8e68b87. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJH2567483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52522c06039e7eb668b3472c2663b334d0b1c08139365b86903bfde9e1d504. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJJ2500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dcf6035e52c74cc65b438f97c2716f947f48133daf57cdbab19aaddf634dc3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCAJJ2500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd495a5f10382f83f220d4b856ac2e177b943975d1e3e3286101caf15f7b08ab. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJL2529345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1dcb9de10aa5de51f8ce68334a679970ba9abac0e879f1d8b28f4ca1c90ca4. 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/TCAJL2529158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d327a9777824316b2d9df03b397e83baf36fe3d08e969cd25719a77ded5a776. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJO2543329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3350c87ac8c81df39d5c75bcf5405b3c499f5ffb27d79c0f18f01f7e6c88d72f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCAJN2543335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042972091f1ee80d846f0f2069d17a7a24dbd9ae277fa278aecf0838d3e6c325. 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/TCAJO2500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9074f108f8e847ded9342d5ad8aca020dc7482f2462e11cb97c9b826b5d51e13. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJO2554762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7d135e6d4f00d4d87d94ce3e009a7bf09b862019a7c951ff9e55033dd3ed0c. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJP2576517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc60a3430bccbdf2cad9224bf91a1c24d72918daf09445929f6edb63ad6ad7b. 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/TCAJT2521149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7e16c769161c049c4484e235d9feec3d2364cb61f328cf1970cd580131eaad. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAJU2558039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f50c8970638f5847a61a70d041b5d5819c498398d0e6321bcdae355da20180. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAJU2513208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2015c370001cec2b96320c05db895dfb37fccbd98c14d3e0bffd008a787a68de. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/TCAJW2517228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e072a1fd6e0c3c419f1596c8f17eb55e5a529f537cffde3a90f6831819d793. 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/TCAJZ2595136.