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 0xa25a2ff8c392583fcc64810d676ac20ce0f3d9121b1e88c1f816d34968d1f81a. 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/9fa31b06-8026-4778-9a6c-b9863986faf9.json and https://artists.proofprofile.net/proofs/artist/9fa31b06-8026-4778-9a6c-b9863986faf9.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 0xfa4c764735b13f50c4cd2d11208bbda5d2fb6ea09633fa91facfef5c16a32dbd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N21706771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1aa75e32eb1a1827511e6e3a7a495b13ac6f8af5ab4e41b9148409569bbc32. 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/QM6N21706772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6797e13b64f18e8bc3342121ccc24a410e3f7ad3db660a6bb1f2af4de3b97ec1. 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/QM6N21706773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed5d5c6b800153f52518749a1544a2e898a045e4e263fdfa5468650ae04d5fc. 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/QM6N21706774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbd3a2625fb26744ea51d471509dcc2f28be31fb4fdfdea564d9b8f32ff721e. 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/QMFMF2321306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309777b00e771d8fb613c6f7431c00db9d390eba4d06fa77af28ffecb08305a8. 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/QMDA72399997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bfde388ad25dcc9a0f9b8516b39d761dd014479664d5bdc366218c8b893bf4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/KRE532200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5de571cc93f14634a981374490d52323be188eb3cb6306265a43a1ae7deb3e. 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/QMBZ92295489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b36e6319fefd331f699b634ffc3f89b40b3d538b62b5353c74748b070c70cac. 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/QM6P42211454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba127cbcfdff827003fa59066d53c194aa334fd9dc93a4deeb5c171f82c8335. 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/JPV752105380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e865a187a496e2dfedee6ca125997e91b631c195a8ebd428818345f5018239. 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/QMDA62160561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157d17975bbd963d201745958e2fec5b27e8c6198919bf85b40522c1032c1237. 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/QMBZ92023689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072d3fba036bdd5485c88f2f90b5f39d6386238b1a742d7461aa6d3f06ae4108. 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/QMFME1987860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca40820ab79799c4a53bbae5a95b525268467bc52cf40880d9db9a6e26582199. 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/QM7281942187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f242dbdbfaffb1d24c8ef54e6f6a3f397a2e3f781b42f1f5406caa38c8ff055. 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/QM7281906018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36231652542cdb699aae0dca0e65d97bcbfb8c1248c02b791d9bde412c24f111. 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/QM6MZ1811356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c40f158cac9d12bd397fbbacb7063b8e6fbcf38721dca3e142212a5b39b30dd. 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/FR59R1664369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f89b67e42754f1003a8f65c7c45798ee2e3da694c638dd0d0d48b6639d7cf. 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/JPV752205782.