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 0xd9da0d787e28f655d6a3758456e6f4003d8d8f0bd4b3602ac95dccd3d34d8fa6. 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/b6012cec-63c4-4174-a020-c13082d6e0f2.json and https://artists.proofprofile.net/proofs/artist/b6012cec-63c4-4174-a020-c13082d6e0f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I'm Sick (feat. Kid Milli, Lil tachi, Kim Seungmin, NO:EL, C JAMM)
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 0xc49120571d45c2a9dc7d16fd215c5136607117da1d1e93ec037fabd4b22abb0f. 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/KRA381903240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521010cc63626854c27e0fe8edd0ee6e7031fed6d8a3c2937c1fbf4321423bc2. 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/KRA381900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ae255906574aec11286f6c023d56411dc7b92af954d9c8a02cb2f4b1c0ede9. 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/KRA381800855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b0876a2c62fb89a06d7dd298f4a9adba93883bd80415ad5e8857b37d62a316. 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/HKI491800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4123fbefb3ee6bf0049bea25062a636dd6040a60659d2dc7c51c41a25416792. 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/KSA002302468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a92946fa11664e6d853a656a0492b2b3909bc4730e7d199d441cbdd2f47c99. 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/KRC711800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425c0e25bceaf84427128b6173126472cfe2ba6fca0979061d5e1cca0b0088dc. 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/KRB462100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88021604119095e7a67177056397253c0b072c5dafd36a69f2c40072ff018601. 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/KRB462100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424797973318b05e4129dc0048a69653ca6673de0b9f3c697b6c68373de57e6. 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/KRB462100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3600ff9edd564df807bd6f5878f55ed8593a002eb09ac61f6b118497d9e3d7dd. 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/KRB462100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374cf4106eb232177d18a1f7ff16bbb7963b137875d6a13511afd4bac8fe193d. 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/KRB462100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf1eab200130fe6cfb11c1baa1405459599b84d883ac949d578e48803edb2ed. 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/KRB462100405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a978d9ce122874009676b692688348c92c1b1dce3fe9b4c49c35952138c32c9. 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/KRB462100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f4eb18081d3b8d74aa0a1b44ccec4ed1b2c56b322943c3c627c73946ee9de0. 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/KRB462100407.