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 0xc82e91d4399e1c41a376ce0882e56cc71fea0f88d98328a72c3a352d92bec700. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04a4e082-cc6a-4f29-b2ad-0d278f1c6bc5.json and https://artists.proofprofile.net/proofs/artist/04a4e082-cc6a-4f29-b2ad-0d278f1c6bc5.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 0xa61c0941f4ee6fc89805127d7c0ef11ada2837c0faf59c138940262fddecce21. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/TCAEF1911310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b451fd334d42f5c3d0d2abc364f6a32acb602330910fcf02ec06ee7c5ff200. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEF1911319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287103b34e7c34ff728e8c976ce322e1f616c936fe640daf860e29c40d2a007. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/TCAEF1911328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203759e35bf50f9dccf444e59fc5507ff21e02af995d813f75a78e8c54dc964d. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/TCAEF1911332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1924a0ab6235e28c79dd3b3384545d29d51aae78a051f9c88da1dd92a3f3885. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/TCAEF1911333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71c8f5f69f04ca7cf74b1320e009d2d86e1cd2dc32312c299fa7a353852e357. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCADY1870377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8e7c61c5b00a698ac60d20ad19faaf8447790c515b7fe6e3bfaa14407400f4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEF1911354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49fdd7fd52455cc1ed03461e42ca343c551c0910c7c3e0633de04010aabea43c. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/TCAEF1911355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f74e41a5e2d8034801caef96bd80d8485a07e55d8595553392fd096ef06470c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAHL2324581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245e9a433cfa860d4f72c9f7c09a5a605757f7721930b286c1f03859373c191. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHL2324586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd252ae849c519bbbd700b81fd3719015f87c5940fd74bc7b16f52d92706a14. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHL2324617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eebb4a51ce37c6f5d5485d6cfbc180360f3b6a5858d845a931ea5e3ea319129. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCAHL2324634.