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 0xc1dcca132086eabe078b901aca5cc699ecdf48f122cfab60ef8e31b69ea46a14. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a6c8ec3-f9f3-414d-af36-8412c418106e.json and https://artists.proofprofile.net/proofs/artist/9a6c8ec3-f9f3-414d-af36-8412c418106e.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 0xca5ff1d5457cef60c6a7d126a3ac54d1e10fc3d8b6fd19db25285be4cc8b767a. 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/QZTAW2209408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2873a7b568dac77b1642e1a70ba902dfdb9bb96c56290c9689246069350a76. 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/QZTAW2209410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586730bd5f87fe1fa48d373de8e6ad9c84a865d3a0bff7556ac99da3d29ee4b1. 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/QZTAW2209411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85538d43073c605221d7c5aac541f2738866e8babff3f744528fa368ed1a971. 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/QZTAW2209413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a21a153d584877af94482b9d370c90ed40fcd4d0ecb682576848548eef7ab. 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/QZTAW2209414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda31be95f02b4e4fb57d89f81d65420bd9e5e983c9c8f90240dcf4f36e0e2c17. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTAW2209409.
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 0x399c01647209a3bea4c0e58252c9a7b7e46aa4e65fb8fc112968ec436f05aa5b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:02:59Z), 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/QZHN52369761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ea4cc3bf740e07956d652386c097e08154618b23a408bc3d5bd69a59824a19. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:10:16Z), 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/QZHN62301211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f91a1c6cf1a68d515fb8f8a39c6643da6d50dcaa69394b0b94f4d45ae31547e. 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/QZHNA2314306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab75daa8f6ec5ee71ae86d34feedbb81e46313c46299399bb9cef8a3ae11fd8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:42Z), 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/QZTBA2406179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ba3f684b2a4e0f27dc1d69b2ca71e976723fae32a00bc0e237b837dc6decf. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZMEN2561282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e2c89c2d0d5110ef8386c0ca5a7b18b3c074fd20cbacc9aaca9e37b2739c00. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZMEN2561283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1856c489b25a867c4afa2aeea414126eb5551c3e47fcb892922bc4adae485ea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEQ2508440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb13c48dfce7d45f16c221946169a8571306307e39e18e8c6f8a35954643fb6. 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/QZES62354377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5b0307fac841752ca4ef407655475e0ece8ec200dbb5467ae2b5f21578002. 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/QMFME2297467.