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 0xd17e02de3e2c31ae30c38f3f0717ef3982b6480f8a7657c0bcc346c6980b72c9. 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/bc1d0751-8381-41a4-87d6-258f485ab57e.json and https://artists.proofprofile.net/proofs/artist/bc1d0751-8381-41a4-87d6-258f485ab57e.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 0x01407d64dafe79a38416ec23e8cc700d5096646405312a138d41eff264717387. 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/QZSYP2401545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc61ecede6dddc488a3c9296ab202e29674aac6f23b5bae7299f3ce246b0ff1. 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/QZS7J2309143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1205795e794d8761abbdca95e9ac78c25f6f11bf3e79e48fae5c365b9fc898e8. 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/QZSYP2364228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2e9d0b7168f1120408dceff0d362186dac66d3e2d7cc489ca6685ddba3dfce. 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/QZS7J2380058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8149072d4f958797a5c0f18f91f8b2c799b3a947be194ed8989be52d24dac3. 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/QZSYP2393790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dfb58465602ee719758e0a80012a02dbd82b4ea2a09655b2c33a998bfe9e17. 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/QZS7J2391953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c8a5dc11eb793a2f39f165710423946b30aa77b497505ec005c067ea65971e. 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/QZS7J2366615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0246919165921673381903b1ba1d74b47c9a2192b3c94aae54661d3f432973ce. 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/QZS7J2307331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d90bf41b9b17b5eb91b22f162ce482f58a96721ece8407e9ae5849b64a8fa. 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/QZQAY2346903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f49d3d7b7a4005cbb9042768dbd6a8b3236f45c2ff6e738d08c3d643c3ad88. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZA56E2101236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a3df2d982a2014f651e99efa84a8c903605734da362c9340dc8269cbe5a183. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAFK2172741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dd49dc8a0d2f17a26472e0c6872eea33035aa3cb7d06d4cc2d81366686191c. 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/TCAFH2016022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c18bbc2097105b7ad5d6781a7023c9a5650b4ac44ba25322a6bd140c1e1574. 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/UK43Q2011342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9211c0f520d298021c7ad8db817267b219ebbed0694a561845c9e3af06b6b. 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/GBARL2300331.