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 0xda93da15d185f89faafb8016acc2b10d92ef1aa52d6bf49fef855cf857c03613. 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/9ff38dcc-792b-4892-9a30-e186fee821fe.json and https://artists.proofprofile.net/proofs/artist/9ff38dcc-792b-4892-9a30-e186fee821fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Estudiantes Definitivos Rap (Danganronpa 2)
Among Us Rap. Un Impostor Entre Nosotros
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 0x26ad803dd204ef91b43fd8dca71feae14787404be9d420e4dfb2dcac9780c5a1. 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/QZK6J2052110.
Tomoe Gozen vs Elizabeth Bathory | Maldad vs Justicia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2336fcd4e5eb7b4c93a0fcd3cbb1ce861eaccbe09365948caee542141d62c5. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZK6M2154560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97bd265c141d65781e2c2c4fa3b0a0a1bcbadf0c9516c91499165a4cb8d572f. 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/QZK6H2103501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b330bc8861e6baa55ec3e102d797bd5961d487855aef4eade215d087cef7af. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:06:12Z), 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/QZK6F2186065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b21102bf586e2e751ad4058274a87e7936181ed3f82988433abc9594e6f343. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTAX2272626.
Concierto callejero de Bocchi y Hiroi | Bocchi the Rock Rap
Tu Segunda Opción | Friendzone en Anime Rap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125e059476e3c942416900a1af3f3be2b82ac63081963ed77832bdcc10acc5e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2365568.
Wu Zetian vs Jeanne d'Arc | Supremacía vs Nada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f041c9afb310b933c0c854d21dd88f89f8534b75dc830adc40e4317e385ec5. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:17Z), 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/QZMEP2391387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245b4536167a22595649fc00c7a320340d6291bfde0630e69fb43fa4b0b7d929. 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/QZTB42388310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cbf63f8e81b3d4823d4aca301137ab1f29a46ba71c9c19545673da5600c4df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBC2324379.
Concierto del Festival Cultural | Bocchi the Rock! Rap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fc48dc1e51a0047dcd41edd6507a658e9d4c1de8e239d175207367ce0e9aee. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTB32416426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e62752b07ecc60926df11e680f0e025760943600a58c992abb79d852dcd235. 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/QZWFX2459852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03944fc8e5f789ba3bb71baf1e3a9059e971a58177a0c551ad77177b2c5234eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7R2563656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30426858979579f6db5d07acdfdfd433ef7a160af748fb339acad69a9dbe33b0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:29Z), 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/QT3FG2554814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6b5f4c912e6b9245a68d6ccbd44e64349f0e3475c8d74d09d83da26ea21e79. 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/QZRP52351535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4685b784d5d0ad2403efd3d702c5552ad8fb1559747fafd38ab69d6230d22e. 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/QZTB32276311.
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