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 0xee8a01f28d1209aa47f551ccc18719a220d3a8c1b9259d3a6ff2c4ada45456bd. 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/34c7ecfa-245c-45f2-bee5-52be788c2a89.json and https://artists.proofprofile.net/proofs/artist/34c7ecfa-245c-45f2-bee5-52be788c2a89.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 0x2479b6969a9cf26abc1d9fceed581fe473d9000aa6eaf8a94d0baed4017ddfcc. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNWY2122879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0eb957364c77248ec62046d6a46fd1078705399ecda09de4a8ee8e01e4fa4e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZNWY2122880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29504478d72f26ca97bfb4345d71f9ec1bda917d52c9254f986a5d1bcf97445. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWY2122881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca3069732031e7670977f0f4bb7457bac3f7037816f17d69dfd383888ce4170. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNWY2122882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8410934e08915b348738985cf7324169a86d47e5388e6d62e671ed4b3df7a5. 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/QZNWY2122883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962c1e538a97a3e98a3e1511680531e00bbc0c8981361fc39e23982ac7ba5481. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWY2122884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fdb23c927fb4d00783543b79862fb264705d7f810ef4992932b3e0b10b091e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWY2122885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0970fbeaeaaca3d943871308e1da72259d98ee53e3f552cd727f56bc67f30ea2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWY2122886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89955914389aa6119d5be38a5c140b65735730a6183f155fd484b676756423ef. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWY2122887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9bc96c6eda3eb12c5bd271905d48063b95d5c90af80bb00ba6de185e6c7900. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZNWY2122888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbc8b4007a168d5ef9550a95295f0edfd1d5ae677c36e77da72d50243941027. 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/QZNWY2122889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f754a1f2a2223ff98591f2824f2668ef724f0395bf819c1b0c97dbd6443092e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZNWY2122890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c04ac3fe143e4e90c173c805e3a14de2fa69043eb1977b0a543674b7086a04. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWY2122891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389c5dadafce6b8e10dd236ca935a51e6b1b680ca5f328b8a178a6bc1425990. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWY2122892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a37c7e4a5f64a2c12679653fd1107beb58f510c94a8d84ca4f128777fa5107. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZPLS2181362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb09a8c888aefd27d308ba3cfa9de02b4b074fe11d2c3ac3de91faf33b982fb. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZPLS2181364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176399e5a985c7a011945c1c1baf1c85661310ca299e7aa748947d434218726. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZPLS2181365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f4003d9c49c9de668d36eb34b1109215456de3c05edc3ac47243f036f2dd3d. 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/QZPLS2181366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ec89d6a10ba59ac3587525b77a9fbf7b8bdd4753bf5d880441c41d9e44ea3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPLS2181368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacce6470424ef79e67d2273ac11fa9a6fbf32163bbf65108aa3cb092c2fa5ae3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPLS2181369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe589c77a009307c33c49ca0c7f3461b43fde186c5059b8c6758f844fd7ffe363. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPLS2181372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0927ce56a6fcf06abbf72a648a6e67150120c9ba8e0e5feb2b5d5e4245e1f119. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZPLS2181373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc88b018b21fa5026652f94d3396807eae5c3f06381dc3f25dc2cceadfef8b8. 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/QZPLS2181374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d8545de1fe404d9dbc376e9d9cab3df461b3d3980d88b75bb6e6144974d4e. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZES92214408.