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 0xd4932ce338329128d9bf1c2704cca9106370727b6a8611f2f2360e370fb797c2. 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/647153b3-c93d-4386-bc3f-26f273cd1c1b.json and https://artists.proofprofile.net/proofs/artist/647153b3-c93d-4386-bc3f-26f273cd1c1b.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 0xce06a40247dff5d3598840a43fedf203e44c9d2cdf4259389e18142c32c56b88. 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/PEBQ91609757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce725509179a674c37fd25ed314134276762a1982aeb54c423946513f30b6d. 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/PEBQ91609760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80242b7b1cf3ba7d3ba5e1a9d1d4a72eeac238dac58c47051d4219943dad51d. 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/PEBQ91609743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c02a517eab87082e0cc68a4425cab6247600ba511ef6106a00f5e80460a6c0. 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/PEBQ91609744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8af019856b9b4e10802985f58122ba05508ca2af8fcb63438998b3872e3951a. 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/PEBQ91609745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d559ea9defa31bc58de17b054778bbda9215adf497b64b7679cebe7935619. 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/PEBQ91609746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0565616b0123b2f5d7ffab9e495e3ef04993f2d2ed6f634d6c85873a675920d6. 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/PEBQ91609747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a92045e29050f3c76d90ac6aadec2efd16bd202e0aa98a7261feeb9cdf9492. 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/PEBQ91609749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e66a2467748ce8813cd77c9fcde0e90209ba3dfadba27e57f4ed6717fbf1a7a. 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/PEBQ91609753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312d6b56b04b73bdcbf904dcd4197989080bfe86c0c98f24b9b9fae572bc72d6. 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/PEBQ91609754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c647270354cf3c6dbc1b8190d19afa382011ff502f95978d84f94c5a6fc142. 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/PEBQ91609717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4d020b9cc9aceafb21f1feef829185ce8b3f4b283490d89bd8bba0b7d3022. 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/PEBQ91609718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de52c9defcabef951fbc53eb1fb7313c4465179c1d99a83ff845f6b6e66e862. 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/PEBQ91609720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd9453293036865cfd5f1fa32621ee04b490b1ddcc5375e5f8ecd7a6c63673. 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/PEBQ91609721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536c4279fc4484e9420196ef965810d13295f5625eaacc46003c23a2e03bc21a. 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/PEBQ91609722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024c76b232835fdc08a2a40b3c4e71b169ba559f68cd505fc071ba20def9164b. 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/PEBQ91609725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181af60689fd5d0c37131acee5b7c8959958612545fc272ed5b83bfaafd6998a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PEBQ91717116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f4f59f7a22038eeb3eb45990a83089bb592957141c65a880bf11872e00e0a. 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/ES71G2034753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76eca60e37265436693bc05cc06206a0d10e041aeb2a4311152e6979133639. 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/ES71G1922031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239f593c1c7bebb5bbba6d771b6f36ac68823915f21fe20a969ec3f7ec24c2d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PEBQ91609740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50643d89874dab03c9c3e4c769ebe59f301b0b331fdfa8ecdd18b104f34f25e. 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/USL4Q2019733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ef598dfa3175d5812eaf7428384915b19fce3f5614fb9e4ff75aa9294263a5. 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/USL4Q2019744.
Paranoia Colectiva: Tributo a BBS Paranoicos