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 0xe67ce84484b8f95123ed1fbf0e03a23ee77d207a95331361ed153f321162dec8. 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/993360ee-4438-44d8-b176-862d75be14b3.json and https://artists.proofprofile.net/proofs/artist/993360ee-4438-44d8-b176-862d75be14b3.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 0xf338671695e928574ed34fcaed246ee54e99bf8899f42e8d98b789f198af3582. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWU2184508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d163d229fc7340b8adf198ef41e9146546eb01722a0a3a50ed07e86d25cc28. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWX2163075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4e17c6a31ffe65a2f48b1f0a9926cb4cedbb9c005f73d3df1152f7e8705505. 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/QZFZ42272084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e54ece3197b14fb0d5ae8b6426929425ba31cd3ae6b065fae5c99593202d80. 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/QZWFS2326844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8ab6cc1f13df676439ec6a4867403231ad37c7fe4812bbce31d49c9961299d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZWFS2327940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63c5f884abef7df4d224f792b3030d1cce25673d27e1f0ccd700343cd55fd8e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYZ2528735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f16f63404fd9acc4ef00ca273cb66f5f10a483f412ccf89c1c452b847492cc. 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/QZDA62505852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8696f9b033d6d206dca653a7bc5f821a2926bdc2efb2d29671ec866147618c. 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/QZDA62505853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778559e753ff56b8ef157dec824760fdcd09781590ecfb1826c74199d1381ce. 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/QZDA62505854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb00d776ad6c2e4b3a2fbbca3f1d9511a079cf488e1044882474f214c429fe. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMEM2418829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd08ce8f35e019d1daca13fee1c2951de778af5cf81e85306ebc19ac79a110d2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZMEM2418831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ff08720ad2c007797788da10329b6c5e3972e4b8b761947c2572baa259a4d9. 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/QZDA62505855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ae46e62afd093a143541953b3373de2eb43ecd59692bd263b07c654413fdf3. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZMEM2418834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcd2c961a376c8e3133659e4216f3bc7c24a4900087d69e00da4dd2432d8efb. 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/QZDA82508119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300679497c24f965c0ea499a09c11b51ed64117eab39a8bfb7514566d909ffd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZWFS2485926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f208ce52abeeb96838664eb32638c59eaa2a02b4f7040be5611edf2bff2d07e. 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/QZWFS2485927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598f317d9451d70d34f6fc4aab9565dcf2dbb5f6684f67bd086f858ddc8805e1. 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/QZWFS2485928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d07f4317883a978366ed85deacb8041888cdbd7899b4d2bb6a98648fc54df4. 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/QZES72516930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37efdfe849abe8a763587804989aec35940abce47b7522f265b254c0d8a7f793. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES82174380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c37ed1ad3c4c7157e7ea1535cd2c39e3d09581315354fb6400c157304999e76. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6J2572414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a3a3a7c9b3dd29693aedd7f21876204c196bb7926544e14ef4b4977d4df980. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6J2572415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598f317d9451d70d34f6fc4aab9565dcf2dbb5f6684f67bd086f858ddc8805e1. 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/QZWFS2485928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5425b45ccce41b857c5191e5734851f63fef730fd1ac32f78ebdbdc8e6a19a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZK6J2572416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb00d776ad6c2e4b3a2fbbca3f1d9511a079cf488e1044882474f214c429fe. 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/QZMEM2418829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb169a81de5dc7cfba16abc3f796b7032ccbb8e259165004c3d8a1ae6778cd3a6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6J2564007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dcb86db36207827f480b6a21e9cdcec6ce7873e7862ca824b64683ceedcc2b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6J2591773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c6b7e754e532d15a575d9a6ccd273574052c911482cbabdfd06a25b364adb. 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/QZK6J2572418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6194168f1c0b7596756f1df1bb70bccb2af84e281ee8acd336548e5126941. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6J2572419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d17e14a0e77bc69819c4ecb237d4676fc9c085028bc90fdb2bf83cc11c1c141. 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/QZK6J2572421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859ccc2e75a9d24656eb39c5da4f8d7087f6fa7264b1ea7e45c8e88f690c7d38. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZK6J2572422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0611d1cd6e675c5a0daebcc395513489f2380ea13b3fd5a8870550db473b1716. 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/QZMEN2401237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc68608a52f244d786afdf5679a9f19302324b15874ea3b961a088a8c7d0d2b. 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/QZK6J2572423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed94f33d6c317071d16c538c0a0e2ce873180910a174434285267971fe1460ef. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZK6J2572427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e9dd647ca05694d6f93ff66e45be94a9b83bf947f6629db82bfc761434db5e. 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/QZZ7X2446719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e54ece3197b14fb0d5ae8b6426929425ba31cd3ae6b065fae5c99593202d80. 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/QZWFS2326844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a09c3c85c240a900634865c98fe53182a2f0ff8ece71891cb635aa4ec64c64. 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/QZES62160096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1487b4005f5be40f8275e3064e311f8128aa3b6bf93ea8187a11bcee54879048. 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/QZNWU2107334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf338671695e928574ed34fcaed246ee54e99bf8899f42e8d98b789f198af3582. 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/QZNWU2184508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97671900de8efb14315e80aebb9479b4ae43858732075c6b025ce1c4141359d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFP2548798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788797ae54fc66b4cda9635ca35f74e92c9999322d092ea12b13f702f9456506. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFQ2599426.