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 0x956212ab94e5e921294d2c46b064c03f3c48e1715edc4a6cd82e934705f50fcc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4d91455-268c-476b-9f31-d5a1f5957633.json and https://artists.proofprofile.net/proofs/artist/e4d91455-268c-476b-9f31-d5a1f5957633.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 0xf052f302d836e49bb60e57ef1f9bfd0d12078d55e536dac5ac93c79af1f491ae. 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/ES71G2412978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde1208fdc137e11219be869344c83d69f04bf66ea15433cee5ff892b5be3844. 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/ES71G2412973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda9fc5e2da93fd9f64b6d65fbd90a1dfbab687d6ac9a8a6bad5356985efea18. 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/QZHN82460796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe74bd4e931c6a4bb85c81022b73ec6894dd0fae0cd69ba7b5407d37a5070837. 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/ES71G2418883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9d1d64be1ea1fc474c1d0f51ed0fdc989a8b232fd53a1c3c1ddac40b4eee1. 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/ES71G2418884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cedfe74e6edd6cf9723d1a25fef1ff5b332a50c509a411a98603d0bbfe1f5. 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/ES71G2418885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e984379c6e12a795693ae31364f922c1fcc86999f45c63c015cd387173ff1a7. 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/ES71G2419514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4f0456850684f90903dbb1b98e54f7af6830244f4bd2205cce7a8057f58ed3. 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/ES71G2419515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b2ca1959fe6127b41a845b57b12b9a163cf1bc5fb5a086d54933772a9a4ef5. 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/ES71G2419513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fe55cd1ead57c524b359dd096e3cef2b053fabd09256d388b2ccfad0ab080e. 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/ES71G2419516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf052f302d836e49bb60e57ef1f9bfd0d12078d55e536dac5ac93c79af1f491ae. 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/ES71G2412978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ddc6d1a9bcfe0dbbfe07a522b806eff9603bcb819d661d0f3bf4680e247d2. 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/ES71G2412982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25637b20dd8991bcd592aeec7b905229d98e4e5d101b03ef3df0d8ddff56064. 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/ES71G2412980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846d9e92e2618ba9a226b0011d4844a7a022018867427dbc8999c92d5d122389. 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/ES71G2412977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde1208fdc137e11219be869344c83d69f04bf66ea15433cee5ff892b5be3844. 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/ES71G2412973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39710ac6ea3d7f122ca7755856355678328d7c17ef714dd8a10552ca553c3742. 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/ES71G2430735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1c9e510ed2276a8b4f0f428cdd60809edcc4cedd51a771dfb8abf82a03e391. 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/ES71G2412979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8260e4bea9fb9f659a616b421d1048243c87c261fb7d2960916cc7011256471. 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/ES71G2412975.