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 0x2147a0e4ef341e80623daa80c0aac520b40f0bf2ce27c8a7feeb7accc25d2631. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c30c4dfa-cb83-4311-a189-26c6a14e62f2.json and https://artists.proofprofile.net/proofs/artist/c30c4dfa-cb83-4311-a189-26c6a14e62f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guitar Heroes - Led Zeppelin Instrumental Renditions
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 0x8af8e4f7f5dc1ebaae4cc0a5592174c510860f68e6dadb3f794b28df3a59c27e. 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/USA560742898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fe93e03a760f4d02075902edc5cd2c2fb0940258944384f6c3302794568a16. 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/US78S0507606.
Temple Of Blues - Influences And Friends
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6843ce77cdcb89155f9c7272dda62c394842841714fbc114af99e60aad082f9. 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/QM6XS2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789786daa99566b19b7281fc5b558ae6ecea748ed158a97eefd578da5546e26c. 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/USRY20601034.
We Wish You A Metal Xmas And A Headbanging New Year
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7dbff8cba6de6c53b60f006d197ce025b98e6eae94f6d6f984b0a06f325c40. 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/GBCBR0800275.
Harder & Heavier - '60s British Invasion Goes Metal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e9a5efe4baec0fa829f726b8d03e0ff74f0f67ff65db38bf6fc5b718e4b0ba. 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/USA371067477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ff41ce6bf293ac493d92cbc0e26acf1577bc761238d0e758edad86447ea30. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USA371067484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8020cb234a5c146f00dffd5ba29b54e0fddba3b744ffb9a2bd3b33a6608288b. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QMFME1334586.
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 0xcd291809cbe7a610207eb2be0066b9a65d5ecd8806df9831581a1482529a0de4. 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/QMFMG1355001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5774c83728a6323c5034eed2782727cfca4c766dfa2f0dbaf014c9d614c7e1b8. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QM6XS1807542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e165ad46c9cae996ccd1f094e44da572767b4a40acd01041c2fd30e870995f7. 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/USA561014087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5e3b6aadc3067f53a681086e00b0822dff7f859791a977b50d80ad1350914f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBCBR0800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c12c187d2fb9947d6887591dc4b421c2a7a0d2289e4b96831efa9ee75ac55e. 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/USA371067486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6391326fd5d6a4ba2823d9612b7d1f60cb12583485ee9b525c487eb29b95b4f8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA371067487.