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 0x07a6d4d78f460ed8c8ec1b32b10bfb41d456ef28cbe6f14e924c6f916052a405. 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/59a8b279-8b68-4569-a503-b7c964ee1ad4.json and https://artists.proofprofile.net/proofs/artist/59a8b279-8b68-4569-a503-b7c964ee1ad4.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 0x25f1796a48089c68eaabdfc4f60deb13b78ff96acce980add81bf70e5c56203b. 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/BRUUD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e4fc5e1aed77ebafd5234e7be090ddd22f7ea1a057f0433d669ff397d47a19. 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/BRUUD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8759cbcda5acd583b8f9864edad2ccbfeb0f818b7009555dbf0a530b365dc0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRUUD2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1796a48089c68eaabdfc4f60deb13b78ff96acce980add81bf70e5c56203b. 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/BRUUD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c84702fe0a903fbd66abd7e81e56d6c0c775cfb52d61437ba6204a4aa5d8a3. 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/BRUUD2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982ee3454f0b43a6b11f845750f7e5e635d5e73a72eb3dd0470157b2a299e33c. 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/BRUUD2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76850254c504bf05a1ced66e4ff885ea6c92256ece73089b554add6153705b7. 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/BRUUD2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702f22c238e27dec24d94d3cffde0844ae7004ac69536ec70738522fcdb32d95. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRUUD2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9548610ccbcd152a9cc388b977412d6a1d6e9e64a6b00096892ec0a5bbb8b0b3. 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/BRUUD2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba0e11aa4bd052307cb0250a2cc47bf8752c23da8120706209b8d92428b79d. 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/BRUUD2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3698044eac6afa8c7ef08b100baf2d878e0f4c07d4513c7e1d21f0554df5a055. 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/BRUUD2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6c23e95cc79d3b23da476973ad53b00ccb401c910a47a3a58b3d2bd57dc901. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BRUUD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4ce1cd1990e01ba357a878b659e435e986df05b44dffd92f04b3ed7919df6. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BRUUD2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b099d0b7738cee554e2f35783d74bb4456b1da22e57d81cadc556f3113ec92. 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/BRUUD2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6c23e95cc79d3b23da476973ad53b00ccb401c910a47a3a58b3d2bd57dc901. 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/BRUUD2200005.