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 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 0x56ac2a8dffe876943ebf7d07527498141aaab2384afa50b9c461e8fe90440a3d. 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/91978a9f-ea97-4681-8eb3-90dbc6ab103c.json and https://artists.proofprofile.net/proofs/artist/91978a9f-ea97-4681-8eb3-90dbc6ab103c.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 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 0x3e29c3889967f1917d08202f8662c657a543ef476ae5e92a6ecb0f7d0ae24339. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPP2106988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f0d85ef5d65f01628ed75f0c5d9cb5d0393ca4ef42b0939b76b3615f1ede5a. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCJPP2106989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1762dc87189d8bc118bcfe4473383aedfcfcd20cd7dae122a25427695926479. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCJPP2106994.
Alice in Misanthrope -厭世アリス- - 2018 Ver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f6f311dd0ee186a228a5dd068c1f767e90b472e19cd539ed97f5a78e0639a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCJPP2106999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ed738424af1f677e47188242ebf5e24c7fb5bfe4ac77a7b9a7ab23f44d748f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCJPP2107002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0fcb28c88dae9ec33645b9071422283057bfb8aa0f79331491c1baadc3d317. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCJPP2107004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1d1de41027347a9191acb6a7b126060472a0c31103d2337f59ab5f640fe878. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCJPP2107006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34057471f8509093c8eba51462ed5ad8e583c0b3b0c0a6a091ab86c0c9cf4734. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPA2456110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5983523171cf171b137fd1e7d2746732d13f2b36e78c283546bb4dd563fcb47b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCJPA2456119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ae85fa9fedd7eedfef2e1aa1b5610858071d12294d7d37dcb0f02f2d3f56ed. 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/TCJPA2456121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a11d328a1470514376ce33147b94a40fea12b9de8c9e699af62ce3ed4befe0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPA2456122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1f6f75d1d2ec16b79f8922d3a282859bb0e10efaa47ab02bec5c0534ea486. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCJPA2456123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfc69e74505eac2493c5c52377f48e8efeb5998f06db22fe5c60b64442c8b96. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCJPA2456129.
Calamity Fortune - Short Ver. - 2019 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389238f0d9267023be4842ce5b2fdfef09caeb11bad655b5da541c14701cf3a6. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCJPA2456130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04a5b83b758fe4820d0b31edebff988b2ae5beec782a2a89a64eb623d9c3eab. 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/TCJPA2456131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760da4b4d8812dcd292b888211fe832af5c6233669c02f06331eb20342b3d749. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPA2456136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1756aec5a1d691d5d5f51cd0df7e1fbd439353ac48c29311ee8959c0632164. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/TCJPA2456143.