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 0x1ab89b5e6974f230844324717168d6795bbc365075e5cf25257253ca3e93c4ad. 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/f47310db-6331-4cf6-8907-1e434a842dba.json and https://artists.proofprofile.net/proofs/artist/f47310db-6331-4cf6-8907-1e434a842dba.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 0xc78d8159901ceeb37a73b83ee344f92aecf59b9a8d3363b05eb5469b9968fee6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJV2439613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e4d1ccf2585c9152b6d26f19aed6fb4566b2d8765b371e4ffa13fb7aec4fa7. 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/QZNJY2446903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33d6aa8b60e612c82d5aa628253085b65c3cb09ab3aa467cddb22b42c3161fc. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZNJW2436704.
Quer Masoquista Toma Só Tapa - Eletrofunk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88262c1df825637cc120c6da70d115b5b15cf903cc6b8bf78739b6f4008bb1bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2423045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a93655f08af1380eb350a69de974432a6613d1f744133f44ebf5989120d7946. 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/GXD7G2311712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaa43d2f644d8abe4ed4a8ecc55144011ea8153ce68cbeae06bc0ab338955ed. 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/SGW502438929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6193ce008cc3c128371a36af26ba87a33e7b46bff3a7d241d2b5adf4c9834f19. 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/BCZ582500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192cd5c11ef71d06b3eb8438a310bf5d13c1ed3ecd31d01971ac0dee79054f62. 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/BCZ582400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761423768c9871aaed5d4053d952536fbaf430d49d92749bc21e69f898f2d873. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA112456988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc621409d8f4410c7d9d050dc6a92b8d4cac21fce70b6ffccb31bdc858033baf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ESA112456987.
Tropa dos Sem Amor 2 - Super Slowed - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f3c7010380b0a46106730bce92fc50402c76150bde6a67c9857b0e46f2896. 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/QZW9L2458067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae08f3e850085624dc373c8f82919d81b2a02284f5374071772adeb0e39301d5. 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/QZW9L2458921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b76a7f75f47569b6eccb5d1b90bb15396a83c0f38746e407dd34f73111121a2. 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/QZW9K2493245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e07e6fff0399796c1a09a523b53bd4f2d1b4bead0a8bcd156c9f7662c5d0e89. 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/QZW9K2432138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adbe5498b42fed9f3465351c8b52f9921555825c5ec4a00d7aa612e8b2ec440. 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/BKNU22500165.