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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 0xdaddf1ae62584d311b6907d2cbc2e54041ae4d8020113b186e37fdef2be56469. 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/1dfedb14-b347-48ff-b96e-c1466c345d8a.json and https://artists.proofprofile.net/proofs/artist/1dfedb14-b347-48ff-b96e-c1466c345d8a.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 0xee954ce36258ec4bf75da0634ca786e525bb5539b748548a6bd7c4b37d651eed. 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/TRA160900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c57148045e75c90222b40101ea221551c49bbd99297710432c8b7e8cb0cad. 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/TRA160900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302ad8a04291a8851e93aa10e7087ae6bcd7a1d4e8eae671199d541c20bf5c55. 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/TRA160900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc171393f59c68f822e8c277223b3c4086e208cc508939ca1a650f96131f39f0a. 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/TRA160900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f615b835ea827e661c53b720bc86cc59fb360d1074009e4418e1c172f423c3. 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/TRA160900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41881e3a22dc077d8de7abf49253b5a8728cd03944921bfd2c1cc66eee88247. 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/TRA160900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac57c4e31e1c21cc0c99f44fecd1ac3c48ac579315564632cf4e25a49e916cfa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRABT1300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b02a152343138e10319bf7b5076195d175a4cc450c723d2943cb4e380e740f. 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/TR0011300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d99d939c6f5570303737381aad3293281806e11863790b237a98a9f26615b0. 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/FR6V82185602.
West End International Music Search 2003-2004 Top 10
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4634f14351a133a1ce3bf49522088cea97ebe3dac5d6fb49059270d62d8e01a. 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/USZUR0600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527bab6ace5b3a9a06b6d3992029c1a5094fc2bd6b74f72dd37bc7a2a17e5853. 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/TR0011200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb158cf609f731297a216373d6f85e50c2c3c5fb4a56c0093452e9e1f99652. 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/TR0011400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb158cf609f731297a216373d6f85e50c2c3c5fb4a56c0093452e9e1f99652. 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/TR0011400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe976950b28182786698d1e83906d278e2bbe1320b10f8ff9a15d2b7bf2399f6c. 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/TR0011400362.