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 0xd94d70fc70263be094bef649f89a35c61cb05d2ea69243c6578669407e2a3cfe. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5a9af59-cc5c-4c14-b363-10459cf29929.json and https://artists.proofprofile.net/proofs/artist/f5a9af59-cc5c-4c14-b363-10459cf29929.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Star Marker (From "My Hero Academia") [TV-Size]
Mr. Fixer (From "ID: Invaded") [TV-Size]
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 0xabf5e127fc53c1f6e741a4c3758d755dbc53186328872fdf7542a744a4898a32. 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/QZGWW2047655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2970e81510463d01eb692e0c59026c748b6c3c6835fd9f9c9988dc8e6f001a47. 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/QZGWW2037097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e13d30031d3f7dd93af0b41520db476438d3bed10a44700932d7d4199c9cb5. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZGWW2031759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a7a8f71da919cbf4f5ec5427327495b677cc11729948ff3c0028953947cb77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPJ32203266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b283314793429a925b066091e3f9900f66bd366abe9f272c3a5fb18add9732. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZES81891954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f65245c0d754299383334e68d880c620b3fe60de5949f1a755620301ce73b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGWW1985547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360b964f2026ab05be3fda92c99bde2841091a3103d406095828bbdf8d2bcbcf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPJ32203268.
Determination - Undertale Parody Metal Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb781859a71f266068fa499c45727a10a1bbd8f02ec14de449bcc3cfeefbc3205. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32203267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de984375d8d6158d6c52c8edc7c089129b2c1ea902045c4c3d2275cf4c1a8b7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPJ32203263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfa062142c8bc5b75d540e5c142e1e30f8fc1443f376e6f491e5dd2bfcd4ab. 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/QZPJ32203262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3629d4cfcbdcca18c0a72d5bbc50776c9f6984c41be5d83204f099c2e8b0b218. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPJ32203265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d557ff684d6b0e544dc623c670b11eb1c657adf2ea8c4cadd7ad39c89acd375. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGWX2109904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2da5a6559790c0b11f9c187abdc0b46620bbb15c0d42d0bbb63c920806246ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPJ32203264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca8b67f11e4c326fa14e0bfa489a8b3dc4cfa58c858d03b1fb77d8a4b3f8698. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA61895560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45a9d61bb0994207253df579cbbf1d97b30a6787fff5c74a875eb1c69639307. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGWW1955808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a31654da7c3b16b473b8cc5dc54fd8530569ccb8f14d95664554b184c80d7b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZGWW2043329.