thumb|Apache gangsters battle Paris Police on 14 August 1904 A gangster (informally gangsta) is a criminal who is a member of a gang. Most gangs are considered to be part of organized crime. Gangsters
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 0xaea821f1a4ae8d911253978f924513d730e498f4bcf75cc008ce71bb92575f92. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1fbb619-4d8e-44d0-826d-93d8027b2c5d.json and https://artists.proofprofile.net/proofs/artist/e1fbb619-4d8e-44d0-826d-93d8027b2c5d.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 0x5c81dd6074c6da65d6f9fac3987a883fdc8bff8f6dc9feea66f86d77c2a15d86. 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/USDY41753678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b56154f48a7d63c93075c5454c0b0aa5b6b87c718bd164028386111966400a. 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/USDY41753679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889e9d04f79fdc3e17d354b022af93efdc38281768bc03c0ad0d87c5f5479fc9. 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/USDY41753681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a6b33ef295fdc3d5bc7ceeaab17ff29e4e22ced98d3affd4032ba2dd3783f4. 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/USDY41753683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edcfef1d178d0d9f419cf1233902618b20e8f4f149494d4051fb81eb1f604c9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USDY41753687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb5110764b76c040e02856ec89b29f409498f58d33a012533f396dea23e4b43. 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/USQY51119456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0c35cc50febe080474b0eaeb4d42ba257fe92f20eee17a2c48a3b436530283. 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/USQY51119464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d50d03b9f2602ca61f81fab46f05f33db457f70d7eb2e5989423a92b9ae8b9. 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/QZMEQ2457358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003c8a4f83e6a66a638dd87fef18353047d65bada375cda0c77f43b56b88976. 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/USDY41834064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf812597666449a0c07de4633aaf0e4fdd02b8bba2db51752021d129161d93d1. 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/USHM91766726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140b46d46422928cb02f68b6ea8b890696dd95948d41c0c6eaafabcceee706c0. 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/GTA111900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36a111db098c88a4dbc7c999c80a9f1dede64d6e52553855c304485e5308499. 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/ITBQ61100257.
Over the Rainbow (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31f23d0bc136e3dcd65a4f2727c76938195b0893382172a11901df6bade6808. 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/QZEKE1843497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd9e8c88b3c7119cf849a8683a74a2b2b368353d0ab20e771fcfe0619f3faa. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZHZ31944830.
오버 더 레인보우 (Original Television Soundtrack)