thumb|Papal simar with double half-sleeves (without the sash) A simar, as defined in the 1913 Webster's Dictionary, is "a woman's long dress or robe; also light covering; a scarf." The word is deriv
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 0x40c897ffe5e92c1124378bf90ab1a223ea66280a7359a02d7f807bb838040ff3. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6474f187-d9fe-401a-a1df-b9865793261f.json and https://artists.proofprofile.net/proofs/artist/6474f187-d9fe-401a-a1df-b9865793261f.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 0x63643defd43146b012d7b856066478b55cf9f62e52de8040202196526ef5dd19. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:15Z), 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/QZK6M2132907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986f64202fae62355e0fd4eb9c2e235cbf8777962e336c3f2f4316c985edaaa5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6L2123583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bd4ddf192dc60735a4c01f07ba73aee9511645ca43d391f190e8500511e253. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWX2370473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09769ca1a580a529baa8bf1a4b749186a62cda6f15190f57052073703c9ccf7f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:50Z), 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/QZRP52308098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c21dabe2f98a67b58e54bad579eac1fa9e56222ae265456f2def41ff2ace4b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:07Z), 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/QZTAT2371716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b76a7b3ee20de224e358888ac145c978b28ab105d256e116910f64dffca1c4. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTAU2328156.