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 0xbd2f453ad6be8cfce2a81937c117eff257d9b40f9ecff69f49557be3597573c9. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c4b4213-0837-4379-b4e7-c77c0c062c08.json and https://artists.proofprofile.net/proofs/artist/5c4b4213-0837-4379-b4e7-c77c0c062c08.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 0x91b68888eb714fd1b220c17534d1d8c178eeb02ee645912fab4976abfbf3188f. 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/KRA382103832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9a887c9f3214118c5337d15d0ced8ba833ea0576ad52028468989bf1900572. 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/KRA382103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe670bbbcc8ef5358891cb7d9c750024ed3206f8b95e3b835bcacbf7b652f6edb. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/KRA382103834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b29cf306e6583475037a74c3a80da7f18be7567d82b2534cea0713a257cec50. 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/KRB471800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f541a6acbd02d9308cdffa5c2adf7b74b657122521e80cb1b24440925be0a12. 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/KRB471702095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ace3d91cac16560fea6d787208706160157b3bd69c9b2ad5abec19888941f4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/KRB471702100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6556abf79c40f7e322d5fa1085fc37fe3d61d2a97337275e6796ea0c5f2f26. 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/KRA382100783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc055d8edb26967add5b816f992a0b07a2972ccd02fb728759d0c526e5520fd7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/KRA382100788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384a72fec1f1f7c000717a26686716d37d03831ec320b36bb24350d30be1aed. 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/KRA382100790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca3c37273b94800f024d8bc55e9077d44bd56719d1f8f802072cd5659efa34. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/KRA382100791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c8da963f5950209297f5a952ddb9a4595a2975f85d1f4816f88deb82c2aaf5. 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/KRA382100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e528b5259722aa3b630f1bb533c2be97e38d6b7b149d41405959fbd2a582675. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/KRA382100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd0bb4847f130d8117adeb650b4784dd8be24d48d493c6466c00a5a183c656c. 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/KRA382100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556578cb3096fdee99823fb44efc65abc081fdae5c6837870c243ca276ab5aa6. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/KRA382101025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11e6f6eb1ba0cec3ba7a0f067f75c001ea748331b8576155f80b3a090236855. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/KRA382101028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05433d0d04c1cf18d426e66c0f2d1c0ee16439fede74a2dab96d144f740dc6da. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRA382101036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62e0d8f1fc22acf44d0ac9f0a2f97db023bcd268544637d9b754f2f631266c. 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/KRA382100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c44707989b339587ebbb4cf1b459ebc6fcc9609ccc9a3ecffd2b4280cd710e. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZNCB2185129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29850f46fb0a2076cb1e343b7b404a9cda1f42dad390a42a191c507beaa676. 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/KRA382159693.