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 0xa05ed3a7b883ed86a87e649e7d8aa8a72c408f2b57e1e2daf6531d09fad477a1. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3ec596a-183f-41c8-a679-670dbc27bb67.json and https://artists.proofprofile.net/proofs/artist/c3ec596a-183f-41c8-a679-670dbc27bb67.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 0xc3dda83a9f912426b41e7b4928c5766d305e9e051a30b3e0d424f7125591c45a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:30:35Z), 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/ITUD52100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f39dbcdf23ee8910609f03f059a04c00d191807ae0a06e14c6ce090da49bc9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FRX872327264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6a261745b5a6ab53d80c88d86bbe50485037e154e2b0eb736aaea30cdbb4e8. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:48:58Z), 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/DGA052293836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66739850287a77dfd70cb72b17735cbcbd77bc50bb852947ad71c84ff01cf44. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR10S2384846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea9b30f00f0d32ef56145fd7c63cbccf35000c69b3e533af507c23e684449b5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:24:09Z), 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/FRX202347267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db9227b5d4046da2b1bafd2a209d34493fa7b8a2f80538c59e4abc67fd18f4d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DGA0L2320463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae11154825db954730f981838a8765ef0ec01742e1d7fe95f6526def50b027. 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/ITPXB2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0708957f1f35a128728b205f29d98419d73637008e31d3a5e32d4266d68970a4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITPXB2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ecb85dfa62aa95a7a5ceaac31fc29106357d25bbb86c84a1b51325f501082. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ITPXB2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54e534f5ce2b486d39e2f5aa68d250b1facd11787d5ff79a002031937942b7e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ITPXB2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45b99ff15eb13de744fa90f5e42fa03f2138a6c2838bd4d807baf7d2b5a5359. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITPXB2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b3e726a02b6acc5caaf6ca4869350753a76e9d2764bd93d25426a1e0e7283. 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/ITPXB2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44178f71e0f41e85cfd142acb430bc24595156883ca4945260b9b1d0cac85190. 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/ITPXB2500005.