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 0xf34e971a6c882893b12f41feb8f628f015655cf5243181a87fd63a5b651447ad. 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/6a5a1d2e-c1c5-456c-9975-2c840291d940.json and https://artists.proofprofile.net/proofs/artist/6a5a1d2e-c1c5-456c-9975-2c840291d940.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Poison (Hazbin Hotel Original Soundtrack)
Poison - Hazbin Hotel Original Soundtrack
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 0xcf28ebc3b20d27a89d0a4fac113685f944c93cffd0676d7746d80a77e40e6b66. 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/QMB622301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa535ec5fb18df0501ca847efbe07ab516a1d9b5d4d4cbdd3c8b6c04c5cae48c6. 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/QMB622401808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ea6718e1f5c22723049678f5294c54c29728d5aa02e1317dae5259bf41e354. 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/QMB622401809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fd6e2310b78b73db5efe74d8ee423bf32b79852cea6de399af6013fc7e8913. 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/QMB622401803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825422b386357953f3fee6cffaf64cbea1ee53a6f6eb4a481924fda2df1a90ea. 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/QMB622401805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf056eac80c90805d4c399258f4378e309a8c12bb74badebf4c0446fbbe4289. 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/QMB622401802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3545e3d058e210ab937ee1c63a415a66514e0828e850c5663ed7ed071f865. 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/QMB622401812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a4bb48f5de126c1ebde2cff6daba60513ddb56a5950ec880b0cb3ac073eac. 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/QMB622401813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b45bcdeca9df118108b210d0ce4c3c2e1ac9fa30522210278ca486244d361. 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/QMB622401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30dbcce1158f9a00ad2734bc0a9294581a51205955a01832152152e34ae1ded. 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/QMB622401816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c49d2a87854b7ba9bb6e2f50ae9f476b530b2bc10e7ffe58c091f58376c6e50. 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/QMB622401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8086f354e388128761ab012ab523fe003667c7f260b5243dd4fc5649dc1e02d3. 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/QMB622401806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc5bfb7374252f526bff34c149c55d1875c88c255ff29beb45c63f456c0bf1. 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/QMB622401804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48891a239be629dc2c2962d3bded0a3e61bc237ad8492b9a3e7196def27d309f. 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/QMB622401811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a62d073f3a264c31d781b85182c642041b15516b9913ffb934ec9095c83b7ce. 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/QMB622401815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4324025a393b3fd1cdcfc08c6c0e550f6f69492a8ef1311f0361bdd4e39ef7c. 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/QMB622301801.