D, or d, is the fourth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is dee (pronounced
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 0x0b839b1a7cb164a3f783939cb4d2697383a3f04ca681c6ab1d29a537d31a394e. 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/582f0299-a516-48aa-a882-bdda9346bb0d.json and https://artists.proofprofile.net/proofs/artist/582f0299-a516-48aa-a882-bdda9346bb0d.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 0x3557e74c77aec9c847a130e28d4b28b60cb06984d2bd86aaab89d12983d9d27c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPB600906001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b9df40ebba6053e6b65b390a77650e8e11a3990b1ac950e1a9b8bd0b95fbe9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB600906002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322c2ffbccdc941c47f264c15d37b523a71681e74b8a994a9fd798c873fb2eb5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:54Z), 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/JPB600906003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aebff1f178de0332af94206a91bf3afd258fa474cc4cb1dece5326b6606c482. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPB600875701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b6f04ba5fb4d7ef500ff34a25493c56af77777a3499e63f684dcbfaca1bf06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPB601012803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77962bd786be5006a7555762509e6f00f83b081dc2e2b0984a6661f5c314277c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPB600944501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9b9970c9c0a01f368ce2be0589b425288cac70533cdf397a6afa6259ea9c85. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:00:56Z), 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/JPB601012804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb43485f9ebb70d5b6f3d76a031e0a54f39cba55fb1ce0a5565d94a07e2665. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPB601012806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ba21f9938753164ea5a50ead345c6644b697f8a02cdeb808172f217f808703. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPB601074101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818299c237b7d41bcb7a0c43cb2f58306b8c38a1d6af9f1b2812ed9bbaa4c548. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPB601074106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55e27b3542882efdd0c5f13eedab723c99a25823512189415661093c9e2731f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPB601042401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1095e004aa9918f884a109c1909ed5938218a4689efe5af87479bb7ab0a98bf9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPZ921812287.
Vampire Chronicle (〜V-Best Selection Vol.2〜 Two)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f2d46a33805164c30aae0192550c0b47310d8e44473e1c7853dce5dc68267c. 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/JPVI01405620.
Vampire Chronicle (〜V-Best Selection Vol.2〜 One)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f67029c5a6deb2488204117ba2ea5eec3b8c8edfb314ce48d2c821251e69d5. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:15Z), 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/JPZ921906213.
Wedding Day [និទានស្នេហ៍ខកបំណង]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c612507d1b1cbd9776b9f0a8bef55bdcd2f1af0b1f3725e62219e1d19ba673. 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/JPI101702463.