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 0x2d56e5dbf1ba505c92fb74e665662802fd18db05a75b0c596832fb2755775c67. 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/b2c23d88-be70-40da-9b3e-4c142acf1ffe.json and https://artists.proofprofile.net/proofs/artist/b2c23d88-be70-40da-9b3e-4c142acf1ffe.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 0x3986aebcb1772503238c077c7115ccfac70237dd67d4248dc53d84f700afef01. 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/QZPLR2283468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410bee7c38607e4b6bd9517c59d9e7f564d9c9890e9f45579b85ebed204b92f8. 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/QZHN52462109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7058cb6cdd691740fb92a2dedf47bfa9a94f07326dbcdfacb294856f4f91a78. 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/QZWFF2315692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26848d029f168fe2facd16ce92deb829caee510f6edcb9ce00e8f32293d5199. 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/QZNWZ2342977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fceac69d0fa398c0d244a6484dba7e0de758f7bc59046298f16764eb1cea53. 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/QZNWU2351124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42af473a71f21c0d835a56f4da00320a8bbf5acb2646ce2d8f8c1e99d18c83a8. 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/QZK6K2244876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50609d77c6ee8018548f91a39b9e48e2d198a914f996e66f3990ef0be7a6a9d. 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/QZHNC2144524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be918b58454522acc31ecc7a6d9439be763e44518894736e28c6579d0b9630. 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/QZHNB2455727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829c4ea8ad7a19ffa43a627e53c227db5db0e6a65305028ef0de2eaf0932a4c5. 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/QZDA62318880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c542cda7ce1911ddc83463bdd62f38973ca04079f83564b48a695374d9e6e43. 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/QZWFJ2336803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6b1efdab64d1804f6d539f9b6a463f451ffce90bf913db4d3823a7cce066fc. 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/QZTBC2307457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90edf018e08d6380a67f721b0e922939d6f5d9849df0e98ca84b63158f7452a. 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/QZPLR2304674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144b78d8328c2a227da671d7e9554e2b952134a3b56725196812b1bb16f592d0. 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/QZHNB2455728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144ea0871ecfd55f0f5069e1e6225995a09b82a8913b17cb2dc82833621f1d78. 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/QZHNB2455729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250acf1fc59141033bc38d52b7c1901569af486912b2ef2b3efbb16849130f2. 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/QZHNB2455730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc34bd6aad2f24098b081616d9e2910aa67a6a94a8dd3438a679afaf39fbef99. 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/QZFZ62433540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fceac69d0fa398c0d244a6484dba7e0de758f7bc59046298f16764eb1cea53. 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/QZNWU2351124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c3b8b89b7b6e5ad7d49b35eb251f288eb8496212eef9912f7cbb03d5522bd5. 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/QZHNB2455731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad47581c9b6f48fec575b161f5644f5447ea791d037b11af35b61bb45acb719. 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/QZNWT2326752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f468ce5e3564435bdd8aaa950e91d127677db8dc05cd3149710b5ac7c2653. 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/QZK6P2386650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9075e929dbf23669f15becc1d3411a3c08f7c94ca57a3f352255239999187900. 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/QZHNB2455732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc624e416a8b1df61848867913c02a598e24a6e6b73340512f0116f06aca8da1a. 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/QZHNB2455733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aaf0e4e84a1a798391d64653d989b6afe84acac06b6b6ecf81acabea35dd2e. 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/QZHNB2455734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb168f7cfcd13903a7aa7f23abd8ea4baffac4cf44adb5312c710a7dcc9506f1e. 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/QZHNB2455735.