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 0x066d3d761dbeceb746a0f91fe6df66d455e9789b1db880c60dcbc8ab2f110434. 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/7915ab12-4450-419f-9f83-6c8493f95fc4.json and https://artists.proofprofile.net/proofs/artist/7915ab12-4450-419f-9f83-6c8493f95fc4.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 0xc7df54d83c77cbd1487f5568b5a70f8b38dde943097bfc3fe768694fe2397c50. 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/ZZOPM2220742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce768a33339da0e3c52e6a2e59de9866d41d99b30d2d6bd797d7d7dc00bb43e. 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/ZZOPM2220743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a556c95302aa43334c592ffe930a970546c2ab97d8fce1db0278d5853d9f68e. 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/ZZOPM2220744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb752396667c11dbf68cd35f91378524b64b364fc3db61c17b69238162d2e574. 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/ZZOPM2220745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbac68589a51e2e9f35a354e4b8dba694673944a08fd2bc04ffde653dd04a6a. 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/ZZOPM2220746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da961f86e0ae0595656bad0982a4a4e5211b7cf349d852d52e641ba8b9f53e. 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/ZZOPM2220747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0936f029b67d104c9bfc99355800cec873f43d5169876c858d4ad3b7005c1b. 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/ZZOPM2220748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628fb0c4c116e9104977fa10e7bef7d1c945d6c34723a28f7a84d076e0bb0974. 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/ZZOPM2220749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd24f2fe1d395b647ab5710d3c510f33058c7d82beef1fb383841a70aac4c0b. 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/ZZOPM2220750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832cef571b6b35912d8291e642b10d4ffbe89d651892d88fb317fedf532439ed. 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/ZZOPM2220751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0cc19d555152d07bdcbc4836b153ba31ebfbc2dbbeaa1c272bf88d68c62aea. 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/ZZOPM2220752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feb19dc44313fe7c75d922e00c803af048264a79663029b29f9b0f44d33b320. 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/ZZOPM2220705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013fa877420b30ff6d0f5a9baef60b9ec67652f97c43426c1e2b9075388ae2df. 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/ZZOPM2220753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d1e97f6e5b1ffb3a55d8d720490875862e6114681150b44aba5c809ca6e11c. 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/ZZOPM2220754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ee03400eacc49677a85b402d451bb9775f422db94feb2f85fb7c6e61606314. 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/ZZOPM2220755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9989924374c1ee5b9ae1aed6d75b6342c4efed69c41367100c7c97564d49fd60. 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/ZZOPM2220756.
One Night (feat. Dappy & Haze Da Martian)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dd84cdf95e309e08df99d28f167d9fb4f557a45c541f8eb17f51b7d3e936fb. 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/ZZOPM2002834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c1c7f4f4e990df46ee9889ce1d2000b29e7843fd63890aaf2d28a1ee41c83. 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/QZHN62400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08db80acd1c6d7b0ea5d891f186166e05d4867011281ae55c73e9dd17c8d750. 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/GBLDX2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d089d30e163437cdc6ebded30e5db496caf0f5d07d54eca7bd0dec716fda30. 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/GBAYE2100850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39da0d0a97bd29ba4ba2c228c6c9281246c888c8cea77e2bbe7388c747dfad02. 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/QZNN32118462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027374aadda094b486a5b4628b1db3a6ec5fef2e89edb3231b992879802414a2. 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/QZTAU2427866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a1cd936bea467fc7937e5ba9c2e17ca60eee3e464314a2c76de5028aa98e7a. 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/TCAHL2314711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0f8e24f777aca595e9238c24f5ef45b01f261684b888abee0f856441b58742. 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/TCAHL2314744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec4106d2f06ec7597b4b635e1eb4fff0190809b5c74626109d67762bd81682. 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/TCAHL2314750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471baea6867b0574b649cc84e45405448c9fd4d4f99fad42d4c9c23ab4a0c77b. 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/QZHN81975194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebaf3dd5dc81f9335fc3f5f5caf805693a194d18d659477551c2627e9541139. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:53:37Z), 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/TCAER2027365.