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 0xc1e5bfdb25586c1f767417cd832aa8c96d584932d77f92c65333460316c5a173. 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/4a868b5a-7d79-44ad-ad61-90eddfdaba30.json and https://artists.proofprofile.net/proofs/artist/4a868b5a-7d79-44ad-ad61-90eddfdaba30.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 0xa1c6abfee1d17d23985c0a09d1390f46f95964ed0d20b64a66e45a9820c1265a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USCGJ1754349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77a7c1f21d39ba558f599c2d4b5e4c3c080cb190ba9ab65ddde2f3450b3dff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA891400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476a41df6ca13c1352f9fbb11fc8dffb58c6a7294709887d47a5f6fca64da5c9. 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/DEA891400464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7516c0a76a4fee1c87e83ce8b181b06a50b43bfd5de2f2158c412b99fc7ef3. 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/DEA891400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e446cba74a90f1bd3a3a324df1a1f58794237393a7b7c4b9700e6fd20b6165. 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/DEA891400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22ecfd76e25a58891ddc5d864da0e45885dfec586e234822fd2f3cee62a426. 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/DEA891400463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79edd5f861f827a7c1735c13c427cb827b45a041937983cb9ed17983088e8d95. 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/DEA891400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89badb9135b374ce01beefc5f9798c3cb01543da9ac2ce466510c6be53ad9c0c. 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/DEA891400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b4306c9cdcb57899f22a738a2faaba2557d648761893aa440f7517cd1586b. 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/DEA891400467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1696b542c60e7801ca40edaafea272bfd0b489ecfb87840dfa0df2c2c3b1f260. 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/DEA891400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eb81683c600ea835016b2a866f671c70a4d4326bbdc39c8c5e0fdaa8f50185. 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/DEA891400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3626b6f2b1af63d21b19bcb2e8ecb76c9c5601bd93ca93d5e6dff8c9769278e. 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/DEA891400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc9aaf67afe431673bfeeaef4548650369b14ab68c077c41ce29b37f279d6d. 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/DEA891400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f25f4d275da7af37f74f2d1812383869930f475ea48bf262cc306c37a0554e. 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/DEA891200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e4fc2220a82a8189a8a4784eeacea89af8644b33eb4b6e17716a9039bfbd7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEA891200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6533ca5d59b176aa301381e0cc679e6632331d603e27dc73b5b5d233c4c776. 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/DEA891200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f77b47f2c4977443dc62374915f09ee0874cdc9be4ca96de1f139235dca5c9d. 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/DEA891200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3599069c4d2018c32f1fd524b47bb37809a3b0bbb56512191124f3f646d3b285. 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/DEA891200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ffc0eb36ae569b2e2b1391fb3bfd5649f059c222e9657c2dcf3da397b72ba7. 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/DEA891200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffd3f0b40ca66a0521d03c1a8934b0fcf36dca32353f544bdf07c6b8dfe5b15. 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/DEA891200007.