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 0x97c458e06dd089c5f8cf4a14514e8f27f19b9d4da54e9abac2a4c2cc129c80d2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a50b4bc9-f37f-49bf-810b-c216874a538a.json and https://artists.proofprofile.net/proofs/artist/a50b4bc9-f37f-49bf-810b-c216874a538a.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 0x526cb831738a8d682ce27370c561ccd3b42745db201f9636f149eb5421515192. 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/GBKQU2481020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d11ac55a6015aec2ffaa93cdbf42052696f2c5e2e0578d3f584a59afab3a9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2463815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86b5199dba29d5dffd7ee33216f2847eb6765838d72ee58c2a9f41376b5cce7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKQU2457759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6b48116990d454959add33e7ddcbb9a63f9bb7243a52980bc2e45da887f488. 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/GBKQU2457742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1684d0b7103dd4a9094058cad2e1a0c84b48a9b8b01cf18ac1d40c3e68e6851. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2282102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf4846cb914f36be41621e9734326963089c43551b45c8a661c4caf57e1c112. 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/GBKQU2274755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1badf8d70741a4fbcb8f7f1be1ecd0c3b7c2fb304b55a1b425ebead86443d7f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2274756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f757b6ae7b93cf2a8aa8a92453fdb422189d8beb4ad58cec7a78e30e16c9fd3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU2274758.
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 0x672f3bd82b318a306f31dfe191da9bdd7a1c8ff9f510a14c61d936016ac5a6df. 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/GBKQU2162599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e3338e0e481f80a7a9bde87b05eb3d56dae2ccf4fa1bd0bba88fe87a653369. 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/GBKQU1965363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931822b74e852a57827de1838d2a670909cf41402a920ba13fb6fe0c42386903. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB4R71800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391056ffb4c459a848980cde065140517ffc8b91470069bafd24d3994ab7cdf2. 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/GB4R71800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19fa812a54f005d54615b53cb085e176126da1a8609cdf0395ed6b3e4920470. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GB4R71800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc336effd0bca86932d68aac8b5b9c4e0a64bc87d3198ff1a62297f52c081233. 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/GB4R71600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3940e436be003207affa3f01c4999370be6b33242e44ab72502b55b024660a96. 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/GB4R71600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c3dfbbe62f0767a103ccbb2bc2c05cdd9a4cb5eb06d4bbd9746b4fcf076e1d. 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/GB4R71600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e911707161265923f5f2dbbf9b1db508c48a116e5669339836fcf6f5e0a15f6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB4R71600063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f66de42c1b9cb314eb888f7be8e72d720c9452aca7c13a198d396aad182196. 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/GB4R71600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670a16be58e64d9c87e2a982cb6a0e6f18fabd02e3450a65cc65d36055ffbedf. 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/GB4R71600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac848988ef17c6fb98e5b131f42364111a7269a3b0d6feab845cfb78a575c350. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB4R71500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa902214d4e2a87028b5114801101cca72c873672863e4b53aebf27b2fc344920. 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/GB4R71500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd720da729a02616003cdc95701c2a77614ebc104a699f76b9e32c468b2fc52d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GB4R71500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149aff0bb0f18d101ef5777d545abbf785f520194d6734b94a32fbe2292d9ac9. 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/GB4R71500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3e035f482259d7940a4132bf7fbffb233142f429922bf5b42118d1dc3cf31. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB4R71400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ad02534ef52a10d78030a8fb6d527ea970b2f506e91c9314e7e2f5382259d4. 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/GB4R71400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a062e6b223d0daf13f1fe7060f5fc71dabd3e2d6fca7e90339c29e97db9101e. 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/GB4R71400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed9475cdf289935403f46b3c88f8bd3d0cee25701b207ed8dcd2a6fa7495b4. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GB4R71400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2bfd9ad31f4e20029cef5debf33d0160a50fd6f7fb36cdeacba4333087e30f. 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/GB4R71400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b1c42911f0c24e95888d80d56fc379d9b05a17323e057694e5d67be3bab085. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB4R71300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ab675c6b4704fe8221c223e181c1653df9e85bc1342f0c1b8aea96f5eab492. 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/GBLV61721477.