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 0x255635e56e96a2aa8ef2303dcbcc699d8ad8950c02e05eddc25eeaafaa19f754. 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/94ccff07-7ab7-45e6-b778-d02576bc503e.json and https://artists.proofprofile.net/proofs/artist/94ccff07-7ab7-45e6-b778-d02576bc503e.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 0x2290682bbc461208d5f238fddd72a491c9eeabcee5e1559ca8ad8ae273d13dc8. 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/PT2DY2300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e61d978165fd646005dccd32f15b5924f40868b12fe3b75c7dfea32c6685ddd. 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/PT5HD2410014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0208299f093e1813db1cd13d8f02e028efb6942f913be5ba7f31ee5adb8b48. 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/PT2DY2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25cbc6db86027afed0ff02cd770c14dfd4a3b8ce93ff15e81b6167ad2eca6e7. 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/PT2DY2400385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b55c9dc287b75eceac593c49544cb7bfc94fb2802e1e8ea54b8ee95a0ff7d. 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/PT2DY2400459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279ccbc4cca011da419f978267a69748d39d400e1abd76166a9e8e82bfdbc7d3. 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/PT2DY2400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd532b1e85b8219f6953a54dfa011f8608cc7a3bd69d9ebc3d8ac801b9e08fc. 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/PT2DY2400462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a909c9cf3c21c2191d31ba646434cefcc44b5109cdfaf722e33db42993d923. 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/PTUM72200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04cbc7fa62a56e8b6f6b30f7a348f48cd8a608ac90ec3c7a3a419baa9de5f7. 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/PTUM72300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b75dc2db8bd41f08a76d0ef46854b8373762a67cfe92ee06774f27ba075794e. 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/PTUM72300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce641da8d10442eff8b00540cb8e46551e92b8fb18b27d157172a36cd10dd8. 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/PTUM72300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e9948e420276f32d025be154546174acf0bc490b3dfb081a31e122d10d9c88. 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/PTUM72300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76f88dd861fa5a5b55074e77f26ad7491fb6e5ad222f3bfa6835d159fe7d09. 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/PTUM72200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80550fe9df9d7a376862ab29dfa5f4a047fc1b818efb351aa1cc7ad5d07aaf4c. 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/PTUM72300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b679f77ba364f3274e8d2afc328d79351a44372d8beb595b500651d1198d8b. 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/PTUM72300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7482d1549873b72d66d271399f51e513d571e2df9aff431b86db6d5b00cce5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PTUM72300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463093f0a3060d4e62fe6ba46fc273e0c4713f5ced261ac5b6a7c90f950d7061. 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/ES71G2210700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445db248b66d0a765487632c4c5ba00a713935b47f94121479ab95b700b7bcc. 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/PTUM72300096.