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 0x226093444601a09c165f994d38cb06bac041780149a24c6e740bf930fe7120c5. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d9a922-ddfa-446f-8437-2a49fdc49ba5.json and https://artists.proofprofile.net/proofs/artist/e7d9a922-ddfa-446f-8437-2a49fdc49ba5.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 0xfc186b63c3c348197fa1e063a4d42a53075f237ce4fca10adccedc08b7c7ad96. 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/CAM461033988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07351e83529eb1e75ac384379703db91a9648442113abd1e55717d6abff520bc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CAM461033986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f717676b682189ba94f5a880f8dee9c7fa868eec299f02e4e0c1e21ac8d1f6. 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/CAM461033989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2e02daa89242a2d87fb975abc01bf8fce07899740df52902c1f64b808d69f1. 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/CAM461034153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c684fb993ebc0256ed9e354e1f009c5b70961fd7e470e9164596454cc309b16. 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/CAM460931559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3a58a13c1cd2e40af4b83d23a20b7942d3d60a71a1780d7bfa2708386424f1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAM460931561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a88bfd83a85cff6acf2eb37e9da8cee3f9598aea021214a4907437822c13fc2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/CAM460931562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8855424afb6c8740f1c711aa8739d856d8d7441841692685ffd68ba3c730648c. 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/CAM460931565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7169d5ede8d8177d078e747cd5a2f130245dc41047a74f503cb44e7f9bd40f3b. 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/CAM460931568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a9fa8f4bd108ebc6a85a2e42e8a5bd87724afa8ed61bf2e2450cf83a0179a2. 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/CAM460931569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6256fabb2b506970647e692d1f931021e27a7b7ec7172da6c41c971f7d800ab. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAM460931570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908eb1b759d7d24b33e406a20f1c28961e8011384aa153d3e49be82f408a68b5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAM460931363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337ca9925ff5ea6c910b8e1ccf7bbc22568ec433ba3eff616afc1aabf7d76813. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAM460422513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0768d0abb7e8052dfeed7cc2cf9d26cb6606a989747a68e92550e9f73808217. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CAM460931368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5a2638990b9a615d1cb2b4ad51cdbc4f717c697fe6ed41619790ba5b940061. 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/CAM460931369.
Tirol, Tirol, Tirol du bist mein Heimatland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa061615fb6318aea0163a99915d28ce40a10fe2bfb4ab71e79664be7c2a478c9. 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/CAM460931370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7305e483ae4fee86b8f82ee1a515eddfc2b0cf718f82b3d9bbc7e27cfb5311. 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/CAM460931375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b114c537172def396dec2ba5e6d56418c8577b9a6a7d107ef8cb77427878fbf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CAM460931376.