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 0x2e4a08e1d7a20f26f6517bd4bd285c2f0d6c7b7f8e7ce33a5f174f95b4de1e79. 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/22deab92-fe00-42c0-9939-b443b5d47f50.json and https://artists.proofprofile.net/proofs/artist/22deab92-fe00-42c0-9939-b443b5d47f50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Once More With Feeling (Episode Soundtrack)
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 0x013d30c99ca3d39e8302ef19b1b2c87ec782ad3d68c20f0ffe5c8ec02f0de6e4. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/USRO20205806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c90f9e61fb7ad8f6d36bb2e76baa07334a5a2f3a9eba327d2e9975a60d7b4d2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USRO20205808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a940caa0e28887a22ec9389aa745ddda786d0b4ff3fccd17e77381b2064cab7. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USRO20205809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b73be502ea567cde46db71aa2f6b1dfe48b0b77498b665971c035a46df3a3c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USRO20205817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ecc80390006f276044b6ca795e765c6c08b03c32e42e3f2cd67061f12a17a9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USRO20205820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2cea02b76e1b0d791d5d57951e5f7a59e24012174536e031093af003163b5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USRO20205821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd054b6ec72daf650d21e2fb40aef362414dcf227dcd2a66fc8b87a74637c31db. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:11Z), 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/USRO20205822.
Buffy the Vampire Slayer: Once More, With Feeling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a579d0e6b8cd74b6a4fb897902d8cd4b9a6c97547dae03bdb75090f6c1de0. 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/USFM91400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6438e24171652f7f11abf758978677f61ba823579725cf44a90cd5c761849b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USFM91400076.