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 0xcb07fb612f9a7387dca208ade6a5a03149c4bfcf223aea6bf077f950d6ab2441. 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/03478451-05fb-4c1f-9613-5a446d83bc34.json and https://artists.proofprofile.net/proofs/artist/03478451-05fb-4c1f-9613-5a446d83bc34.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 0x6dcdc8ac89e7756c19febcd5301b312e0e0c4d7316f57eb9a34122bfb4c08f29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE62M2343474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34610bba0df4303e57ba17c6a4b0b109087a8ee0a7dcae1c5e583c5a5a1ad2d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XW2369936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd630dfbbd6226e50e881466da2ce114a775cce4a8e48e474fcab7e2939cef5dd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6I32258682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f96e0cc981030b984d48b90cbebda08a436745d2fbff4b998b57685f66c890a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6QE2413144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dea7c527c89bb44f3c0a46fd68ef996ae430c0879f70dd43ef915bb6c612eb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE5752476376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9633e019a9305759632e61b7f42d7bda0beedd370e2ad726565717355136331. 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/SE6QE2416183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820831993f5823952c97839e6885f25db82b5c70086ae8abb722cda65447a709. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6TI2309297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a960cd8bc1108ebc6ea27fdb9e1ad275226422a58c4886d319d1dc4bf522f37. 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/SE6I32365646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acb8373dc52cbef4829454cf381d368bb996853e4cfe667fa6afae934733ee6. 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/GX8LD2345227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f00b9de52afb5077182b1d0171527060f26b19375de304e478d1c8ba748fc43. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5752366620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4ac04dde915d20099de896401b7e9f2ede918836df93b131aef8c1ea8a7818. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6XY2281773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3af30b1eda69c350f0cb6abc11e91a0e252c89eeebd65e3b0c2e650ffa899f3. 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/SE6XY2243589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec404da18845f75846e8cb95f7147428915dd62fdc81f6013870fa176bbe253b. 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/GB2LD2210242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84c5c43a268ddd79aa5b5e390a8e4f9847bd6f5b1c408dedefd19381843fa4d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWLR2215501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ea1856dad710c3b98788325e1fece6dce5a0a9d63323f28461c41b44b5b2a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6XX2308351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e1eee863aa22e436c25633ce116caa374c5a4426726b5988f81d7ea332f7c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6HN2363112.