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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5459974e6daa71e7d18170ee452cbf7c1084e04dfbb077c030cdab3049ce9a. 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/769ed4c0-1e8c-466a-b19b-bbf1b1f54008.json and https://artists.proofprofile.net/proofs/artist/769ed4c0-1e8c-466a-b19b-bbf1b1f54008.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1f89e5b117bc5c71f03caaff71f96437a47b0d243a6c7d63942253603f230d. 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/TCAHJ2358216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e090d8a2c046867e31e884dce6d7f0d2c8744f111cde66795be0794a2425504. 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/TCAHJ2358231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975248cd4dd76d3b0d8b7444912b795099fd147dac7087230ebbedea81b2da89. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHJ2358236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf0fda2dc372bb883caaec7e530742aab75aa14ef253bc2a4bcbd1f3df3c5b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHJ2358239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc520a562163a6997681b6a4bc16e3f0fa793843ae2a43796f36cf22b513c5128. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHJ2358247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde155a4ffb7567bd4a67b4c1f344e4082dc7514eeb818a247dcc8edea55228e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHJ2358251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a01529b238d05983a30c5a25e790c7754aef70ef719f9d9fb4bece791b3f417. 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/TCAHJ2358259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b03f318a78cc89d69abf14b6bd8ee8cdab30a2e5820edbaca2ed0569b0272. 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/TCAHJ2358269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f7cfc650c6f778c904b95aceba36fa029fdc575fc1ad4fd4f6ba618aeba334. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHJ2358272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6acbf93675721a4838735219cb6c7e6231271e44aef4ec65d367ed024e6e028. 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/TCAHJ2358274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde54406f9124107da1b4cabedaeb9d947f9ca337a5b2b317286792884f38cbf0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHJ2358277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab89f2d60854dbfc1d8b9e7bbc5430cf083fbd4a074e5bd4ea84f81d8127d2f. 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/TCAHJ2358286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e7f9f0ae6aab37aca66fdd43f63c4efccab074fd557a05faae4e2b888794df. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAHJ2358288.
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 0xd67d47f6137ebea4cc6de4155a98e70fd80aac786eb50ac9a4ab07f99060c7b4. 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/CAGOO2209397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e6fbe49446f5a00d7601fd8a4ff2e9d5d9a1551743bce384ae4b27efe21f3. 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/CAGOO2209399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387905b4225300ef25eeee5b9706a09fc7e21e890c128c02e76491a0417dbf3e. 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/CAGOO2209400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b80e7e0c8b0e3af6e527b2ee03337e0345132723b5c225246dc5803343b2eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO2209406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649b93170d314dd4724dc8a3f13f6c146307cd613633a3931217d483e88f817c. 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/CAGOO2209419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b47d0cab1fe95d82c12dbe45a611bb7b06a41d0f07dc491c1e4f13566e52a4. 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/CAGOO2209401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab0a6e3856c729011c2fde7aeb1cecfb9d633b7b3bf02f1404c3e160cb43951. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO2209411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e3fe5561d7a99d305d2ced0f7f0c4500ae7b112fa351ced0a87cff89e11edf. 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/CAGOO2209420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ca96f7e0997b11c7f0d03b70cfa26b761dec70b891ea7d6bf9fe373da3fc1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO2209414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ab1e0e85fa2dbbd273a4a10a7664f8453baa9df1d4e5be6d24fe4ca1b68c4e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO2209425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a03607c1fa41665dd7c852253816ee4e5c28bc9eebd7457fd77420b8ae171e5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO2209415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96e45a929538d47f88cc4c1462e75ba98eb221819013046f648d71e248e4f95. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAGOO2209423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca67a39672c49affa8726deaa6e389781293539d54c960bace1ff9e971cc9fd1. 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/CAGOO2209416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0585b8ee73b7a8893da319d4fefd85f718e0b76dff1206e17596c988b5338. 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/CAGOO2209426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c4bcb8457a066308f68b0cfa2707d69d5dba390e6d766019d1409c3b30f15d. 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/CAGOO2209409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b8f36ec32100b1a9f9cc6990dd366526d1d484255994e65654bc47d596b23. 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/CAGOO2209422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d273ff44483e1ec8e1695979e43456ee9a095da31e990c5b8200cb3a17fac77. 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/CAGOO2209427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6faf534dad05196436cee6a31e68f78fa240f793dfacc055dfc0247676bd9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CAGOO2209404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9159858e9eb1de4464ded217a04d3755f70c216465a9f24e8f866ec5e4c787. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CAGOO2209410.