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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f2b7fb04bc075e725f2ab37902af74b5be85e7d78744cf1036f8d047f13cd0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1022aeb3-c771-457e-829b-518b06114ccd.json and https://artists.proofprofile.net/proofs/artist/1022aeb3-c771-457e-829b-518b06114ccd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884af18100438839f3255cbd43d48119fb812c951884dc9a380ed9f3bd5853fb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZK6K2328760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c1aac74ea87b28207f3b6051b351e853ce3181861b32aaf73cf5ec73a11166. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNWW2394022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b92616eafa84bb06fa9f3e70fd3ad5224c35cfd9b0e280dfc3db903b73d019b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZS7J2340995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547e3b4dc8e9dcb6e582eb84f3496a3da700defb5b81a19867309d0b74c83ef3. 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/QZS7J2374431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e529f1690e28a417c94c7ec63d429dc011152b8ddd453523268f7093957c8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS7J2363767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58662e99e38d30ae0547ba41763910ae2154432742c2a2425d186ad892700b2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZS7J2370092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0fbb9ccf3098ae114c4b3cf0f348a5c1fa880a06d2e921317a17045d43f96d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:25:13Z), 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/QZS7J2309087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f0ba6fdfd1c84efe75b1a5a11040f687c8a4f4b0ff98f96390ae88ff4a6cb7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZSYP2332646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43158163f66cb7c239de2429c11f3b77be683eb87e50894d5e2e8a0ae539fc44. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZSYP2349621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba78f5376fa78753420f5aeb61d8c97ba4a51c6a5d1cc5e517e2b13cadbda54. 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/QZQAY2449128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b92616eafa84bb06fa9f3e70fd3ad5224c35cfd9b0e280dfc3db903b73d019b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZS7J2340995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e529f1690e28a417c94c7ec63d429dc011152b8ddd453523268f7093957c8. 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/QZS7J2363767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c1aac74ea87b28207f3b6051b351e853ce3181861b32aaf73cf5ec73a11166. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWW2394022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884af18100438839f3255cbd43d48119fb812c951884dc9a380ed9f3bd5853fb. 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/QZK6K2328760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a73538f9bffcb3af0b68fd9ebe07c8c492efb7323cbcaa30fa76825115044d8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZS7J2333060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a1ea98f6893646390b8f7bebe2cfd1bdbb10cafe738a0a3d54bf72c228eda. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTLA2427517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65377981a3ebb787c297f728a522cff267b60adb32b39009e729c760bb848fd. 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/QZSYP2343214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa26767dbc84c51284d96a883a67e88ecba7be5c1eb334c7f7478cac87064b4. 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/QZQAY2416109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1a1bf18736ba7b85bccd643eed74a7eb1f1a87e4c8b5c9c67d6ebd3ba9c42. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZSYP2499425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0338693648308ef58f3bd0615d031f51c39420a292f4b6255bdc18cd20858e7d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:30Z), 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/QZQAY2515941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb144a06c277a3809602a31fdae73fef8e7614d982392c81062c2a8f521220bbe. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZQAY2544463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f0641927187c05335f77521086e31bfbe5d70432a216b68ac7b75b5d94d4c. 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/QZS7J2515497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14bf3dc62da3a4335f735c8569f53e2782a5b38fa2edce6f9ae299ffc76c2c9. 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/QZSYP2518028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6b82d1a42bc092db86e7ac4eeab2a359a74120f76ae34efd15a2055e9d19f5. 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/QZS7J2303582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad0b1ed8f9a043d31338c80ae561938a35f48f9d3743c9d9d36f798e0cbdf45. 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/QZS7J2341668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a2617e07f7b0b7d30e3053bfbde793008fa5421595979fd660e0d63590af03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZSYP2395921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2413f21592a98075c81dd6e64c842036bc2f3c9d2c1aa5dad69e9a992e0c5ccb. 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/QZS7J2369409.