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 0x1723b051ffaf3fef3eaf777643dbc47a8155f554b88d22f89a56d0a88a11d606. 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/c1858ae4-7a91-4e10-9e21-0ad75889a1b9.json and https://artists.proofprofile.net/proofs/artist/c1858ae4-7a91-4e10-9e21-0ad75889a1b9.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 0xca9bfbd0140195cceb9faf8126e11d117346b55984b3f6da9c4bc7b9a8eb0f8f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/KRNAR2216440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95878a4ae8ca49aab5a573ab72fb1bb9ff5c2136fa32e4fb9bc51da38ff4766d. 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/KRA532401710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5cdcc48e24bd10534f48af00950f555cde5967158ee4792d7814f9d5d46e6e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KRA532401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc753447ecd9bbb11b426b04a44ebc07c1005c883b2ad784ebc717bae3c9c8b. 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/KRA532401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5e506101f6fcc7bb5fdcb805058d2588e9c55819f3dd701058adb5762b4436. 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/KRA532401714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106617b5a860951eeb2816d748f4a80cb16eb50c1bebdd0ccefa6b223dcf4393. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/KRA532401717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838222911a88906ff4d292316f47483ee1f50723ff6b850ddc59f6e0fb7c436a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/KRMIM2479186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8996cc0de0af6d9f4e46e674a318e808df934362ab529c993a33288f828f1416. 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/KRMIM2479187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ea2ab0f5315ade2366e58694c5ba3e4b3be5f227e324dc8bc3c02be01be5a2. 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/KSB022501582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e7b7243cf9697970f3ef7f2ed4f99f23447b6540da2e7fd35519402f8b9da8. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/KSB022501585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0913956148226d1c4fe233bb974d74c57761901de01375e41dddb23c6b0506. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/KSB022501586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e663f103ef499bc4111cbeddd19c047a9976989f54d32a4c709c77e1a715d4. 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/KRMIM1918430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba6e41d2883fe3bb30fb22b3642e53e31de2dbc5d792e4287f85607070abdb0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/KSA002202454.
Driving into Magic Hour (feat. Q the trumpet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb1d48da73580bcf4422be2ca955d583717c9995f16c75deb6ce53e2f107f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/KRMIM2202217.
Colombia (feat. Q the trumpet, Baek Gwan Woo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645b980ae876c91d2a4f27421d8341a370e65734d5e203e0c5b95fc1accc1e5e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/KRMIM2207772.
Driving into Magic Hour (with Q the trumpet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb1d48da73580bcf4422be2ca955d583717c9995f16c75deb6ce53e2f107f5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/KRMIM2202217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb931a48141072fcb6f6bbe8b30a461e21749c2ec872e54bf0325c2766409b39b. 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/KRMIM2344443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ce9e19b6b70081079668b57dfbf6dcdb0b49d6cf1a0f26c2d26f1cd79e811. 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/KRMIM2448459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1fe8b2cb28d75b5cd12f14e4cd9ac8dc2cf2daba6da74721a9f8b3bd4e5148. 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/KRMIM2448467.