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 0x5271a0dd7c876ab250f36af2706d73967767140dc3e36428309426f1357be63f. 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/a3c32e65-f073-4e1c-98a5-0304caa641d2.json and https://artists.proofprofile.net/proofs/artist/a3c32e65-f073-4e1c-98a5-0304caa641d2.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 0x380b332f0bb6707c1a67d2099b41f7f15be3590f43a1462670fd0410b9deeb72. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL152006383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0557cad4a9b6ecfecd79e15c57944162c26d4a647875f049b0ab5fa19f136307. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVL151502399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862bc0a59eb1e50fcf5b2f99f89f512b71922930ed1f0f866d103ffd68263434. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVL151502400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9663c824aa49c281587afcceef16170f1a96b4e729000f670ade24192c82796. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151502402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335599ef60c7dde59b2713ef21cc5093a6b93662925d9904c9cc1756d981137a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151502403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521bbe75162ef80b8b3066834270cd5aa2be7c85bccb863f007eca38b1de81e9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVL151502405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830a203662fa1fb34561372e0a12917f30083ed4b633e7ee8b9fd6130a51b0cc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVL151502406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60200d50693552c82e4fb8238269732a2d59a387056330d21236ae1dc44078b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151502408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b7d7996ee1469984809485f0e202d93a8d63457968f97b99e9a076bf30fdf8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL151502410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32277151f8c58e441528e22d17d942838ad9394834ca440fd4dfd704c40bcd9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LVC211300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82de8395eba5a652db16daf0edb3697ebecb99ae85e5929e5251367f92262e32. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:40Z), 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/LVC211300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b7a5a587445177ecc55b8fdc4d3ec4302e6f39c3f3ce3697278ec600447096. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4365381521fd437cdaf79aaa5e5acfcc7518fb042472e395e53538460c6d4c9d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9de51cec484033bc25bda9004fb669cf64ffc932553987cc95348485b79a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/LVC211300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d5e0e272c192b423121e41133106f7e44515bbf1a1b517c38682db77d2b480. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVC211300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1663ad3a7d9ffec287fa5f6617decb68ab804187e1316cef3fe1c8f7c6cfd3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d2c23edd647fdb39f3baee285fdebb1bedd989aca8a4054d3806d707afc9c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVC211300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc027fadfc78076964ae9e718d40ca3741967e2bb150a7327326da5ca6f89c65d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef6cccd0fde7a63f4fea99ce691fd9d4453237289b40512c49dfd170c2f48c3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/LVC211300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fd696aeea2fb8dd8bb0bc4ee296d89a601e92cc68b707f339c472e85bdebfb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21abe391e53b8a9619da55a5c66fa207bd06095a63b951a84bc64bf8ccf34499. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/LVC211100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a53cd0b92556c315a76a300338e60e6cce3f64df5ab597c717a903544f4cb9. 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/LVC211100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cd38ff8bb4c469f8cc89dbf8913accd7aa401d5bfa142080f2e86c273ef407. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVC211100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0b223e23ccf0df5b676b5a541700fbe2a48d38e31272c43101cc562217eefa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LVC211100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ce1dfe56c710e953c092bc82c1a087ea77b200ad5eb881bc3eef7da91302ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVC211100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3632ea8f55d9b778a2032987e0e4f9807c410182ff1ab0af2a22097743a7a3b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19db9f0f72ecd84de5c7e04439700f8343aae999b04e7cf8c1b33e72044dcac0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVC211100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f49c74cbd0046fe8a029288c8e8b46bf67615eeb9279f5987f10f612dc119b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LVL152300510.