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 0x217919dedc0af5bbd5b93bed0fd9ba7454cfc8f4a164a1fa0f48a0c0804e1837. 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/e3997aba-71a5-4313-bd7f-31a5e9ba4c4c.json and https://artists.proofprofile.net/proofs/artist/e3997aba-71a5-4313-bd7f-31a5e9ba4c4c.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 0x31d497afa369df789e88aee44048521d3d100a21184bfd0fc0bb0f4772d6c957. 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/NLCK42215166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c64f8135f8b7765e341c0f53875b0ae6d1f0c2bbf8ac9018b5452ed1de1d2d. 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/NLCK41018904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02bfbc93c2d921c002478249f1f7f24d105414821409ae23359c5e396da1570. 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/NLRD52413802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe12b84f8fe837d296ed73ac8677c6cc89caf9b762424aabd8090060b142b4. 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/NLRD52413848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302fed679f6191d3853ef41247973ff81fc8ca788410632bdb4fd97bba5fabf2. 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/NLRD52413888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5789173c8bc8e07873229507f362e29a9709fb24ef17cb102536c61ddbbe2adc. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NLRD52355161.
How We Do It Tonight (Command Strange Remix)
Golden Era (feat. Steelo) / Return of the Funk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb346512994314069c51095803b5e528b7500ee7ef4d14bdcf54129c6f286efc6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBCEQ1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05afe54c8b39527644ea52aead00df930bcde9e216d08964d8842067eaf0241. 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/GBCEQ1700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f52cbc0787509e9a78801ddb67eb75684e50043ec5fc1c4ee83958f7b4f18f. 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/GBCEQ1600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a1bef9fd94ddb5cd20690a641bc5a225592433438b469f7c5b93b08ec5d10e. 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/GBGPZ1570048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d492629ca42321e34eba3e0bac058206e69fafb4c00ccb2f8708e3d0b87d574. 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/GBGPZ1570049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af7bafcac94bda2a6308041401f3ac6b12a73779a660788eeeae0718f397eca. 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/GBGPZ1570051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2235a24367cfc1c1258f2377ab2e47656a47117e5ee30a61e982b597f1a41ca8. 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/GBGPZ1570054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03b3f8ec627a54c865205126235e1a62d051ed70ef50f07a5f0bf97562133a3. 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/GBGPZ1570060.