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 0x5da6e91d4d0c2ecd8cb40e05ec3a3adbc644517ce8116e401176daf7b017505d. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98b32e7e-b463-42c8-8acc-e7d6116cb047.json and https://artists.proofprofile.net/proofs/artist/98b32e7e-b463-42c8-8acc-e7d6116cb047.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 0xf3b1b09821ff6e601a8577d37ac7e5d318383aa3dc35835104d2ee635fdcbe7d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/AEA2Z2348159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c270aba611c98b0593f2e6f5b8ee7a4afb0c1a5d16140268eb7b14dc6a207e. 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/QZW9L2327037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b24a5e44fe55de0a2f6c2f9eb56fcda645498d1e3758f054f53c0e33720208. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/RUAGT2378675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddfe6033fa706b9e8ee8f07ef62b9ebbdf56b24292a93eaae450e3dfa9891c8. 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/DGA092442475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5decbdbf2651d03bb17c733e77a80ef06fe8a0a9048ece672d315a84ae26ebe2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA092442476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bde9c4c50d53fd0013b8e1d7b7363c50ab589c7f1be76238f7d32721a1531ce. 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/DGA0M2436207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669c4c5109a5c5a4096423e940588f8298cf6769c372e0d36717cfd948251515. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0M2436208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078114b444b3af9c66e85f422d21061d9bfc0dfb1df060f32dd9c1fd4aa5ad87. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0M2436209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f986658dcf43c16188bb9a527407ad76442c875cc64c0a9da5f6d653030288. 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/DGA0M2436210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0036eb3370f825c319212ce0bb73bbc92f545e054c6517274b51132ec03f78e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUACR2401537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a609a5c068166637e40ce87d090945e57ba166dcb26632fcd13c450ab21871. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/RUACR2401538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c0abd361653b6ce1c9c7a905d7f053840b1f6cd5ca36ebb5849eb96ba7b5f5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/RUACR2401540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cec443d0840267cf9378bb55fa0436df6cf140a83cd2010fe56886f6924060. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUACR2401541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b66bd43bd88a8e83bfb72b2fb4fb31d153adf98887dc27bf7683300ef23c52d. 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/FR96X2548677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327bc7c5fbda19ba8bb399e6f2d152da95ab5616c8c42d456001f49993861c34. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QMBZ92542824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc55213f80452b040de67c7b3c123d1e7751fe78d2dafc19324dc3f80994a7d5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMBZ92542825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09c2a61397ce1b38aab49f642e4d230a0fa1c1a37c4413fb7ef40ffe2b95ade. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUAGT2583431.