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 0x38d3aab21e31f021480e369e686320a08e5d216463325a0aee92e2bd271c3de7. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0475cff-8528-4beb-b30d-df2714c73d07.json and https://artists.proofprofile.net/proofs/artist/d0475cff-8528-4beb-b30d-df2714c73d07.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 0x67c0889f5d6aaed26227e21a09d920cdde3921afdf96abf24f705a5f2e3e0dd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ace8f085ea610a6e3684a89db007132a5d08224142c098fc23d48e3a038ea. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBBGK7632902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155bfc2c0dced2863eaffc97696481de6c6c01a0f320c7fa4d83e9ebee96b673. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926c7b7ff04ef29b6717dcafa98a72bbbbc1d786df3cbf48115b920ebf2b3268. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5505dff5bb70c4108bcde828b3d476de5c4cac24c542628f2bc212adec47e57b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0656a6efe57cfd71ac1eb2012a8c42edfeac875ef70fdd19d1f90196dfa3609d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c7a4cf699cfc2e8ffe065d953184e04d82472ce82f01a6a58254e8fda87031. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1334bba53870c28526e1e9df552c5c3b624a307033dc80e715b43d4aa73946ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595efa19b925954635ef7a0e6ed340e942d50fefb8c956b427a88e5d41a703ad. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBBGK7632909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad158687dc185de58e0f154de6be8b31253b4b09cf462735c970bbc010538566. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBGK7632910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f589b653168b52eee49347c9b21c5d8aca8a33367f2fd02f734a89ce883f63. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBBGK7632911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5d87a5751871b24d1218622ad776b02a7bd45cfdbe19cffb42a5e18b74f7ba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBGK7632912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9083b0bd3fb965828b3fc7cfc5081d70b0c74dbe3955ab908a9e61b0a62e72f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBBGK7632914.