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 0x07854a55aca2c3322d047b026cb52e78a017b00ea2e8aaf372e670ca0ecbb6a2. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/626b80cf-84b4-462d-ac5c-508600858c94.json and https://artists.proofprofile.net/proofs/artist/626b80cf-84b4-462d-ac5c-508600858c94.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 0x7e9d9c373fed86afdc4f3a020e541a3a4766eb99a3a270d89985b7da4b40e518. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/MXUM72102692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad212ec86630eb9141035fdeb920d51e1ee1045210f016c8f044a21e45f4d2b4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXUM72102693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389b88a52cc093d57c2f9af778c0e0248860a09bbd18529cc3104f80c1f3fe1d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/MXUM72102696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceab3fc217256b966474c01078f6d46e56c07c0f95e53d55d19fca9847b80539. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXUM72102697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff64831c61e8753fa378f32a0d681e8b7d0d03a525bac8d4193d261cd718b61. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXUM72102699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cd7c62bb3d3ddce1eb85de00caf5378071623d31bb644af2cd5b8e50fcf83e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/MXUM72102701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85fba159f81e63d54940b2492c8a9f5592059ec5aaef7226ac959f052ef82d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXUM72102662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4554b1cddee55540564638e6f26d19e2fdc7495586f1674a6578e7082951d8b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/MXUM72102663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614051055f060af8b8fcf64bf7a413444584cc10d41c10abb1843ca30f436d5f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/MXUM72102664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6679de03e7b7b22463b9ce19c91ffc3a056b615b50c8114a9a1efcb441e1272. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/MXUM72102665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8914c608e4bd24806c65ebf6de2b42cf81b072ed36bee135ceeba9a6fba546. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXUM72102666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd2b990feb62080235c4a452b5b07dff40edba2302baf2edd3f3fd24b78a61. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXUM72102667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a301a3c01a401fd2649de1846e923dd2c53a8dbcd9f80084ca0161f37be3e1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/MXUM72102668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575189e5d106dd34907cade22d8b5f29f4bd30d598af707d2498f72ca23c16d8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/MXUM72102669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79afc0ea591eee2781cba52ecb5dc849b955f3baa74913415962f12b2bef6646. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MXUM72102670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4be9ecb3fc6ac35292b156bb6d87239caedd173a5e9712df877f63f8738fc3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MXUM72102671.