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 0x9bb0cb6eb67b39509bf8719f3ba512914cac38bf014db6f743ebad39f83b2ebb. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/510ceae5-92b5-4ca4-95f6-05c4896f0526.json and https://artists.proofprofile.net/proofs/artist/510ceae5-92b5-4ca4-95f6-05c4896f0526.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 0xe06801c65ef4b2d92075aa1449de8e2769afcab42611696ae06bd99dd1307a85. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLC351750901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1e8cbd6f9e0d5fc620c74cbdbb033cde92aa51534bfd01760cfe4816799bf4. 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/NLC351750902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8fea7784cd871d85b1a9347a07bec37b8018ba9e7a40333962f7d898556241. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLC351750903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49826903547b6eea6f3380d13bcad0e92c747a6c2903924810d8608f93c54b77. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLC351750904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93f0e412fffd37a29a32f32002555d9bf8198cf74219f456aea955b92d8dd13. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLC351750905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0824e6c9d3f9e08ee93df99294630c7bb6e85087d4657e4dfa53d0f4baddc397. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLC351815002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3fd9bac0082e3b5cf02ead5124b9a48ac19c696a0404ecb580cfcfbc1113c5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLC351815004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b10318735bbc28bbe501e2a8da3ea820995feb56343c2743f97053ceaa657cb. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/NLC351815007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff38e355c2c57fb60005f723d4f7c80471d48ced1419d01b01d929a1bb313e2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLC351815008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6c1bc56016d76fd2f237eed8fda5b4ca7803852ff93751d04cf7f693d86a57. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLC351815010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1673722285df22ed0f3af17871062327590d346e1c8dfe5e94976c3440d775a0. 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/USHM91336540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a2cb0566f8f9789a8b43c014239ef01e0b0ca31d1c41cb9c3c3174501e900b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM91336541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a00ce6ff66762ebbbdaa3bef34452c93505cccc1accf1b77d01449db0bef9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM91336542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10da4fbd96a756da8cd705c2a67d0d121c3f235f0bed8b38e18454e22edfb5fa. 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/USHM91336543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf74be46f663fc4c31db02830bad8986c2e02917dfd559d47a0300b37c9085. 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/USHM91336544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80186c7e5e9ada7ace734084393ab83da9fa11f18d9243653727855b2449a335. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM91336545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1663bf476f611614f6a5727cf2777645c6d249c3a264e3388b3006e6fdf6a8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM91336546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ff7ad030b22879b2aaec4b8e0531d281a3e78c4a041dd54cdb48d589df3a89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM91336547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9eeddff46474d3118c8215a9593513914f41303bbfceef81763cfe51f12103. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM91336548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52813100d279d5bee7bca1ab0bfb6edb809f1432ffa38a0150c7a6a0443b9345. 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/USHM91336549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955fb212b0a91fd20db9532a0b385e2d4792c7b2801663f65b4feba8e68e3f35. 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/USHM91336550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7beaacc080a839978c2c3f896699b26b9b1c030b92417aed36bb6173b1a4bf1. 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/USHM91336551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cc672b7808f3fa7a29d6a4450f529902882d76f085f8b6e91a9c2421210e21. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USL4Q2302228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148b3825863364be97acfdcd3f185058dcf977d1f6ac1e0371874858011ba2ef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4Q2302229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872a863b7303d27c79214df952408f0d7b8b8791507eb47b917858a346c36c7f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USL4Q2302230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e2794a04783fbdf962182ad54e6edf6789eeec112a6b5936a1ad3d5717d455. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USL4Q2302235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c07ddd6715590a74ff8698f34074453c7ada557e8a64d4f3f85f487c890e65. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USL4Q2302236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a9bb45c4ad854fbf3470ca852d522884b3ecd79ca239d34e95537c5b2eedd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USL4Q2302273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471ba9210c9c3c194b734e063a272e717aa02c361e4f7acf11511652bd7fce64. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4Q2302274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1260761b30f538ca3d81285141c214950c248ad1f8bc01fd2af959751593194e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2302275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88297e0d5267034236eef82d6c7c0c7fab4689025be2ffcf0ce89412f7e210b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USL4Q2302276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ac68136e643ceb511b1d95a38231493a832ca86017e7c632cf47641492f43b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4Q2302278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec72f59660c10faca5f86e3afb4714686e741ed5306a35a102a9305096b972. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USL4Q2302283.