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 0x76bd5633ad9f337d342c74ff61b64c80cecb63d7252e4043be6cafec9c1be76b. 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/31a0dc15-773e-47d7-8ed3-24a81a0ab9ea.json and https://artists.proofprofile.net/proofs/artist/31a0dc15-773e-47d7-8ed3-24a81a0ab9ea.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 0x4a3159fbe8d1e07c7bd3cb1d3047b05cda4cf8f582a219d936944d118d5e98cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22464742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70422d16fc01fa2e77fb27722ce6b0a6ffcf7b31c29300de39c4cbac173fbeb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BK4DA2416745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7df0f14fce24751ec5bf7c8d42dbb659630ca46c402efe8583bf63c5c56c90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2467347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a8094cab6e4bd1d34fa4ea421b48e309bbd9d61875897b194c5defe17b618e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92412301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f22a780f6bbc46ffb26ac7e060e8a06097fcd4724c226c79296ea382e2ef3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES64E2461468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed74a66deeaf5ad69261222603d5eebc67539b32f4127292cf98b14e59009827. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFJ2307294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7a2a41b089d5a8b660fd44b50e2d01392c8b4404ddb07b22283e847e664669. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB32313088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5362f8665e35b4d473f498c3e00b77993f8a3d2b9b3d308476ca0d4e8a24e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLS2338994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71903321b5b06116d89116bae3ed289af4cc5559be9aa018aeaec919efdf5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWR2309094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7eec287f1167337a5d924a24e01280b999388a33785cea7d90c0f048d483dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES82353430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cbc3e18ac949588b1c074759176d665ef8cd1ebd22a6c1e40331fa99b5672e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB62225606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f83b562bec05327d7e49f8185277ef161b12771455f0d37a8c01e32ca1c542. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESUM72200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7128e759e12d1fceab9230e6af5ee8486105d51ce58baa2bcaefc83be3742cec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES62220743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee38e0f9b8a3069f51abbd1ba9c3228765e2a4fa5b4bcae87a6a7c25b962d65e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX3Q92165789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cc9d959ea33dfee25f39323ccaf3acca587ce031f38ccf16efb5511e65c336. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3Q92119510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d25547d07897efe670ee579d0f57c049431ed2c86d86049159db7562d4ebb6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3Q92004879.