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 0xc03095d08d34abe749bb9cab54bd1a46d7f5d22d6998a77f6d5afabc13cf6f77. 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/6cdca6f6-3a69-4745-89f2-5fcff2af34db.json and https://artists.proofprofile.net/proofs/artist/6cdca6f6-3a69-4745-89f2-5fcff2af34db.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 0xe3844e1c9b9d7cb7ee71dd5c363f13ab512419dff610aef604afb71ca350c524. 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/GBLV61611894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1f4b923abf8e576dd0b4c7d35302c3bcd5bfec2bdbb1c39a5d27e4a4f90259. 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/GBLV61611895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2dee897b304ac8628e311e0baa648c2798cdb82b0530524f4780bfd666c30a. 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/GBLV61611896.
Let's Start Playing Games - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164cb3b14f91d3bba37abae11ba6a35af4f53f78ccd83cda72259d73f9e76b56. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLV61611897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192e72654235666254884c4689d8a74c0102023f565b7397acfb030d447c8aab. 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/GBLV61611898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d7d03ea1cd9e7ca7ccc9dde0a47b946e901a740d51028b5073f536b56a469. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBLV61611899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01df05d7dc073dd7684453732fbcf3b1d200419bfbb824ac5e2b8c941f49eb0. 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/GBLV61611900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e837e575ed081f3423876cefb9a50d9b195916aa68d8d16be026ca03351b19. 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/GBLV61611901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760ae9b21d6f7beb2700cc7b95d2d24a43ceb8c32ff1409dcb62d3bb312c285d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLV61729669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8dfa7483332e4d57fddae0eb8c54c9a3ae8248048ba5fb4dce35e489be260. 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/GBLV62310009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c620881bed27750172d469f264cbf2e92c66c94e5647300e593da1b9670e1a. 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/GBWUL2179721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd85a3ebff425785a3044efa97332dd41cb6f30ead39a94bd77aad288a299e0c. 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/TCACZ1777151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014c65f6f64d9e829e0f585e31f5a7dc0d0931752f42a844d728f5ff308d96ab. 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/GBKQU1938144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700df2b920d004032db3d21c0b5efecbd685f724bdd7a13ffefc834f080d4235. 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/DEGA21702318.