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 0x77c587989ee45ddc46d068793cf84b18aeb3d18c700c3a0af2dbf8a505e10fa3. 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/afae4440-c44e-4bc2-be7d-00353f018d17.json and https://artists.proofprofile.net/proofs/artist/afae4440-c44e-4bc2-be7d-00353f018d17.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 0x1f912f5fa38a37f70503eef53ae3eb5625b0c86e65acd44b758617d6ffcc77e4. 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/ZZOPM2223793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff5addf8d4522c496bf6ee2bac75d53e224ba9180527ecd3314076181aae03. 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/SE6QE2338930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff96d1e89f97345189f6b8ac660d16efe83a19f406621e322a40bf9f44195d. 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/ES09C1700193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83b1066557b896e615237b14eef70b65bf6188c99c706cc64e9ae0a3746b4e1. 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/ES71G1720013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ecd4599fc2d0b6782ca820e3d51dc1e45ad8b042890a59acd16c39e8617e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1941271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe636a0bf9293821cc5ca8cc3cb6f653052a31698842e67169dae12e5b4d09654. 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/ES71G2322372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c4d2771109e642debd086209f6f42179ee0152e3e75af806ca6ffe2b932a6. 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/ESA011711078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f996361b99af371a4d2213ee8a88913627d4ce4149836665bd84cca5b83a491. 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/ESA011711079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7b840a140d86e8aff757acb43e0a91327070dda9c8c201f23c0dcdcdf170f. 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/ESA011711080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46615de1628e2eec34b35eab8635392e69872f04b8d8b338ec87667e37e00ea. 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/ESA011711081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ff9a39b486dbeaa27c157114d90bfb1c8c15a3d43b7c2c2f85d84a833facf. 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/ESA011711082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d7f543ba9a7062e9aff541b56c6b0c5b15018c1ce02ab73c9d41732c3c2ff6. 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/ESA011711083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e993aefc8e69acd4a1bafdd3055c6fe155ee4351b52d61dfd5d94d1dba65a4. 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/ESA011711084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82da9f7dc3e7654c46744e824186083d93da021615bc0cb5ca854e71092a42. 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/ESA011711085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c2b9509e2c51689718e5b6fb7ef92230a050443648633c968815574de0bc4e. 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/ESA011711086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee475d932fe63780881af1c1a24847e2be8f029e16b3434b6f96288ad2f86273. 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/ESA011711620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e11b004abcecab6e468e043d1a99536d8109e24ed0217fd454452a12611307. 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/ES71G1834684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff4a5e088464bea9e6711c51fa8fd3b89abe78b5202eb22c4775e14d19f4b0. 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/ES71G2041730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ea0df51eba6a15d1dde532e784c0dc1beef2f3662c32aa23e27282b0dbc20. 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/QM4TW2217338.