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 0x7fd18ec3ba5e9a2e73217aca4a3e64c78c2a8beb37c8168795e519c21cc643a4. 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/1a205e26-51d2-4e96-aab2-08e7dd7ca131.json and https://artists.proofprofile.net/proofs/artist/1a205e26-51d2-4e96-aab2-08e7dd7ca131.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 0x116edca2194aecb972fe7e9c53409868c7f8f6b5f00282ca9b48bd3c7a6ac343. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBLV61921925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cd9aff0de3b6a92d67bbe5dd371ec42ddfdc985a6ee6a30eee8387672b6143. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBLV61921926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cd0dd7ea137dc2fdf73a1bda533ee8e4ea200d71e00896b81b2cc57eb98ce6. 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/GBKQU1996315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce61032a48be9a1bff8bd90a8d436d2fa0cfe79603867552e1e77966a4657bf5. 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/GBKQU1890937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745e5f5473f58db546b2869ecfa64477823a1b4758ab6ca2a9ad4eaf93837fae. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ES94G1915603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b30e38ebd1cf3c38b28a0dbf1933f19fd0bd1bd1fa29ce9d6c874a6da362850. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBKQU1912844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceb24b03a4b0270c0cdefd2b70ae65e91196de28206499c4dec2e4142619a4e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBKQU1881365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5f2fb38c68174c8083c82af9091eac4b14bc80789b586dd8ba132f3ad1ec77. 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/GBKQU1786446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af1586ce65d229f731d0666434a7af3daacdffc43f1814b2c81c3734c8d3935. 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/GBLV62034314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d9b668ffdcc8b51f7d4bd22ef768faca48e8af3142f948ff5460307021204. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKQU2098413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71c37b57e6becfc9feb7c8393b08c429ad8c59ff31f4dc05eaaec1aa7f6fdb0. 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/GBKQU1850770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f8771a498a97094212eca5c8ab3520536afa6bbcd4ad3d7f18906b16d9dfa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBWWA1700197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77975a76e26b87578e608b9076d07295ce47ca1a6874652eaf07db1201f96c04. 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/GBKQU2396880.