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 0xe5ac6c6507d0360378356ee17691c5be6c11f7a2aad1cbee9e391484f732bcbd. 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/4d00002c-7f83-40f8-980c-b474dfec4279.json and https://artists.proofprofile.net/proofs/artist/4d00002c-7f83-40f8-980c-b474dfec4279.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 0x9a6a5cf04595a20240d932007f168ac381c131d65bc19f96e8e693dd699521f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHL2459638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3af413327688a88de4c12ba825e788bbdbe92e086f80e1102f05961f5a33dd. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZS662129018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6be2b0edfc6e32706f090c095ba9456792b2d598c1920ef68b712b14f56a95. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642161171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eb3be42cce1996d24f4c9b48f7d1c61ac1bd7c583ebd00dc451ceaa3c28134. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS632110657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e9b24bd3a44e6b475b78093b1d1a544a35c352fbc54e7639bc8353b5c4798. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS662125368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81cf33b8c96168852c2418e43f0bb7feae731cdc40898170e77cd64c0e9b401. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZS652164055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f33b25fb214e38a29f55d8823736e3a287248771b29820df96be4bcfee6bac. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZS652122835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e20eedee84ea071fc3e67db0bb969c80379978c91df98dc74e91adc9f1807a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHM2041875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f04092d03f4e6a88291a1838ecd9d507f4d6f00e47e2174e4086908d6e8b70f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM42K2051855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36fec1c2e7fbd260b6281353b3217c29f967ed1bd165b721865bae3649470ab. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM42K2010188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccfe4ff24b5ba080db9ad382ed13fa158989bb34a8c60fc0c1a364bce246585. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM42K2075232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6534fca7edbb143dbd361e35fdabe01ba31b9cf0c4f53bd4a212e3996ff6e4b. 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/GBXED1100870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c52787c0e43ee256712afad4abe8dbc363a39cfe0d1b8f03af303b9a3fc48. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBXED1100871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e600ee67ede9fe74084a090bc29b33f9fd9e98e1b1028562fb69321f422a5. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GBXED1100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe67de0300dacfab5a4375a35cf6f9211c03436797798125f7c174bfc7e07c9. 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/GBXED1100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09851b1fdcab131a509f0d5c3ec13a6db17fe5cea45863beb78214ea182d5e79. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBXED1100840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c221b83ee3bf97a9e2a5b141c9d7d0ac98c746bd688fa6c3c250932cf7cf1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBXED1100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e291bd6b7458dc294969dd305a2d9a8d2e33a9048b8ee9b8dbeb4e96063201d. 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/GBXED1100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc436cd7a61168e4015dedf80586f3adf8cb9d8003bdf46dc510058a535042a8f. 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/GBXED1100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb7b8ed8499b4884c257e6a66a6bf64215c2bf3f63a096981099bf5e08995fc. 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/GBXED1100408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f00b80f0f2d41137d9e68aa118fb2048be2315c7850f4bde468782c9ebee4d. 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/GBXED1100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d029b15dc90ec9c98b4597b074165f8fac7ac5e07f6ca9c68992494116e46a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBXED1100410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ca0352a3cdf0ad50d58d6ce41cdc45ba2087e9b6b2c62b00cb0407ace9e7f6. 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/GBXED1100125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3322ac39e3264e334e9008324f780bb3989c68da37759931efc6f12dd597f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBXED1100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99d503b76f4ce2a65e808b512059ae41877b45a62ed685611f4aaac287bc023. 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/GBXED1100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a366bfdea9a851a031b280df28e92652186ab61cde9174f364f5ac7f7aa09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBXED1100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd490fa85b9edf2d53b8041cc3a7887a3ea7da8eee3da2e8b717c2fe506d327. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBXED1100154.
Tomorrow Happened, Pt. 2 (Liam Back Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec1db2408f1750106e187c58bdd0f24dea763736534a1a89361e2da969deb6c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZES72016859.