Dalet (, also spelled Daleth or Daled) is the fourth letter of the Semitic abjads, including Phoenician 𐤃, Hebrew , Aramaic 𐡃, Syriac ܕ, and Arabic (in abjadi order; 8th in modern order). Its so
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 0x85ac81b32c36ea7505fb790fef6a3116930baaf679250bbc547339bc89908709. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff93a9fe-fe22-4cd1-93a7-6f12ea2900ef.json and https://artists.proofprofile.net/proofs/artist/ff93a9fe-fe22-4cd1-93a7-6f12ea2900ef.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 0xa1cb3fade113bdcc1786a3c26f361f5191b4d4ec2785dda55f8cb8049b8f4a35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM21669500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26adc0cabcb96cf7562a5fa5cbf433cdbd8478405ace0b36c0b3c6f1dce40c4f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM21669502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59da268b8b0063d8a58850125dd3f04ef3ce0d9d16596e815f558fd2cc41c9d. 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/USHM21669505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c050f26f3af2bf8ca7ad5b055619707da8748fe4f60e07a36233f1f7365ac5c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM21669506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb65d931e8f30860c1ff669d5dcc8affeb3ee06f193b36d6ca233e802359e431. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM21669507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3660e9d14fc222fffe76bb0cb51f019b33518334036d7f1e14612d9c332db984. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM21669509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35c49a8d58099461dc291b52676d086ceb1e25847af6dcb75d3c1bcb009a82b. 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/USHM21669501.
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 0xf0c71e242fc632b1cb8e72c94514585f8d18b66450ea41cfdb4ea91b9944b0ac. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM21669503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de4ff2509fcc89894399b2d3eaa31fa6c9a5aba27d38d3b6918b76cfbc2c180. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM21669504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eb17c3581bb862ebca2226be1d8ae8d42906b6a33961c271acb75f9c7bec3b. 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/USHM21669508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902c6c0fad11f69f22f0315854f03b8ffb504dfb4b531140c33f7c0cc3656963. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USHM21669510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071aff40a4fa907ddfadd258d3425f60bb9774d5d766d7838782091cbe8b9228. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ2232769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88113cc85563d7c80e001d4f600496d10add9a130760409b9a35880841b2583. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH1633995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3628367119bf9696d5201ac8842236659e5f2929dbba9cac5b4def55d4c74f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1633996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca3bdb0d159a32f99f654c348f1bc4ca821321ec3f0e7a49d7e6cc8971aed2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1633997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2174c1c4fafd31947944af6e41ae5aa4abe1f20c98b17fe51643f686e6bcb8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1633998.