Dichlorodiphenyltrichloroethane (DDT) is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochloride. Originally developed as an insecticide, it became infamous for it
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 0xd07a39bf3d965474e33b270075f99bcf7d37e62d4c9cd50810e86db72ecfc726. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a8d5cf7-d0ce-4434-b4fc-08bb62cfdaaf.json and https://artists.proofprofile.net/proofs/artist/9a8d5cf7-d0ce-4434-b4fc-08bb62cfdaaf.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 0xbd2c3be397bc76db546c9a0bc1f2f29b48d954128b0ece783ee7d5e8c70baaaa. 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/GBSMU9879547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7fcddd8a8aaa2ff36e17a77ec920b54a31519a1a00a8f98cdc2f8360447e70. 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/GBSMU9879554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec9f321c699077c3c211b6354c9d4d9e3f0f2d0594d9a87aaf0c24b7b239b8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBSMU9879544.
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 0x63cfe48b6496f611f371a6485985f16c3761c355bcfa1f01f9d1c793bc652ede. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBSMU9879545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb05a7dc91a21aeaaf7830d991de2561c38e462e85df5d2c4f8a95476f9d412. 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/GBSMU9879546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af5a55231dce35d5aed93b44ceac7b073eeec9ec5ae1aec3cb2c95f769fbe48. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBSMU9879551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80a2c3080973ebea1666688126ef0660d8d665496f2053a68cf212ccaad15af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GX3HH2100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6192b72cfbaa55a06fe281dc92304ce3924779a462d6648d64086d1cf77136. 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/GX3HH2100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf93913b6fe3aecbee00639ffe6a582c94228e83236cd2cba441f3cc6cff57c. 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/GX3HH2100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089248a58edc6acf1769062f444d5545dea47a27a7dfa8f5b1bd67a8675c8a02. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX3HH2100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e94528189d6a0d0181a162607b66689d089e4bc127acb36f06e9347f1ab002e. 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/GX3HH2100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a78ebb1389a8af63c9cc4ca625ece115afbde65103a0796bbad0b2356b1e1b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX3HH2100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec55ceb84aae4adfc78a4a773f6f6b4a8b64b6300e5d658af27a5b30815e7b9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX3HH2100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd55a56aa57a1e04e5b2872d2b0bfbadbbeb0063b91308d4867e4eaab1afaf5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX3HH2100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585101f2556910952177014429f621c63b0dc383f35233bd2f892be2f15d4bf3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU9879638.
Sayonara (El último vuelo de Akira Antonelli Sakamoto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a6af0b547589bf93789bc9a54708a8a5c5b8ec3d6bde714bffcf4954c28e92. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU9879640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e1b8c973f97a390e2c025d00a6a3e16c1e3f7398fb8c693f9e0d31238232dc. 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/GBSMU9879641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0b50f369bbe4705d62b80635171dfc7fc0763fb933d083251b69ea1c5867dc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU9879644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e9e6b6f9125a88bd4f135ba5a790e9d000641fec6f732ff57bce2c173ddd8. 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/GBSMU9879648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed62b79752a8bcabeb217a40c0e347929d29fa014dec2218abacf15f0b76ab40. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBSMU9879639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f88ff5ddeb81b0a686e7acaffff36cb00b45179daa00649ec2a0e4a712131e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBSMU9879642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677946ff05acda6a2a14c52a8c8761be96ac1e08e0a5ea4176ad7bba71501338. 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/GBSMU9879604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25991eda67ff548b11bac4997fe85124624221043b705705d9e14d2765628e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU9879605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f9445674a8a260c9aab8ff8b22ba2d1d976b5cab5fce8603991cfbb8bdc0ab. 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/GBSMU9879607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5c2edd29ddda3d4a32107855a571aba2212adc721567ae8df368d2dcf3b8b. 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/GBSMU9879608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4200ace6a038767a702f84d75d43863d7e407431dff0e5ba6b876345802d832a. 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/GBSMU9879612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d8c74de2f38e825d34e4956baa4f27ba0e528b6662cee28ad8c64ef0c0ed6a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBSMU9879609.