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 0x8efae2dc4c2a10629fa86a5e06f773ad08c46979b69008f289c0da4deb706b23. 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/c23f5cf5-c8dc-4e49-bb1f-de8fbab6aafc.json and https://artists.proofprofile.net/proofs/artist/c23f5cf5-c8dc-4e49-bb1f-de8fbab6aafc.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 0xe6f88f5cd90c78bf6c48269fe7ed147df5349640fb7c69381f3c4e3560467e67. 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/NOJ2R1905050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15bad33f19167a71893e86a8c25dc5b098cad349658e3765d618be3f06b6c67. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:47Z), 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/NOJ2R1905020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701b84af2d85fef3e9eb82591cb86dc0d853807f891f2f5a558669a16ea5ce3c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NOJ2R1905060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912d48d0ec67387ddb6e68b75c5a9329b9d5211d27d536a4cb67f285cbfbc847. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6MZ1914673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc819c1e94de2a41961c09cfa807df4336cb6b2d113bfc93d75c4c5452d032. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:45:19Z), 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/NOJ2R2007010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bfa79436cc20b3f09f5278867db28359d130e2293798bd8efb324bc0578ae5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NOJ2R2007060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c59322d86e5914a314e2393c6359d55ca0655a9d0c21021e4668e6536d992e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOJ2R2007020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87415114fc7301eed4f0b09145b840076a683dca9be2a4634803e1c831cd1a1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/NOJ2R2007040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1e6d8b4581ce6146822e96789cf811a3d2bc42a34f5e73dba138d7ce1277c5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:22:38Z), 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/NOJ2R2007050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fc819c1e94de2a41961c09cfa807df4336cb6b2d113bfc93d75c4c5452d032. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NOJ2R2007010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5677fceb875d61c9756e9419d95dfa21d9c897d5de3429dd41137b22d1c1320d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:32Z), 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/NOFOD2201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94191586dd13453d1286daf275d27e5180b2c89997e1d86f24afc4ddf0a4f11c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:58Z), 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/NOFOD2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5861d33b88791fec85e7a17bdfb9db7b6d122c09be88c78f7c10c2876c3287e0. 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/NOFOD2201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700cfff5a8877fd6d40920151b92792b8328667e50cf2609d8fa55d03174ded2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:56Z), 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/NOFOD2201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800057c25f3d345bf7221468831b3f8765d7d1d8ec7f1445ab915d393c6d2ccb. 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/NLC242100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01c2411d83903769cfa2861abc58df2a1185119416e2632313d8b50680c0d1b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLC242100517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800057c25f3d345bf7221468831b3f8765d7d1d8ec7f1445ab915d393c6d2ccb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLC242100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9546a4dda6bd2903ae294987d4387969c937f669117d61f1470abf0bda956176. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:21:06Z), 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/NLC242100519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4d11fd1cda14abac7eb6cb48f048c965b8604e000289ee85f2eb536ca3f4ae. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:48Z), 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/NLC242100521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e30131c3fe43e67afdf322d4f7c2ee902d9cc2514c409a3ae57c2d9b04fb88. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/NLC242100524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bfe3a70acaee94c3a36a83944c76b78c0fb7976836b411ca985d495afb27fc. 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/NLC242100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4e57f784bd1496dd0ec78dec2e4abe607792a65eaaa79b85a23477328a6007. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:11:05Z), 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/NLC242100884.