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 0xdfda849677737268ff85d5a67da9fe8fe239dafe27e1e80ca01bfa1dcb3c444b. 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/01a175a4-5bfb-41ba-827e-8f9802f00c35.json and https://artists.proofprofile.net/proofs/artist/01a175a4-5bfb-41ba-827e-8f9802f00c35.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 0x3b6e17c969501756aa5eecfae589fe5ba8a49b4f971ed72ff428030f977a034a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA0D1910150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71858af77aecb927e073674da3ff1e72b44ca30b9d6c1879d15a3f4a05ea55. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZDA62062926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d57550839a393222905260a60cbeb7cee673e08da09018d1264fd7174e3b86. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2008448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe640ad5cb29e20b7b3227de7d4529075d9c89f6d05ba9e8034252c4106c420. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3DF2128258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6221436aa39aab771352f66fc99c56ccbe8dbbc4803c482e18e1b9c47582a714. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2228901.
We don’t want to hate and despise one another
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2a5c7f1dd99b9ce138480fde8998a2f9701457c61388f149b4496ca4733a73. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKZGC2200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac8f27669286fd714cf3757f9b4ac8f39fc50399db038c0ab284901642f35b0. 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/DEQ022391401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5193eed384278ff70ac4100d6bd187f9e57364005e5d2241b59915111926e53b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEQ022391402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69bfcc0f7b3c459accd257e6a567ea70a0c8be7853ce1ab2b12bdbf881b33c8. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEQ022391403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60ef9491e5bf5b3a734efb54b07e6e3b16efa93950b6403a55d9bbb24722b2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEQ022391404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f9b517343e81ba986b5bf2acdc50f09e876eaa612a9cdf6f578bed3cb2bc2e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEQ022391405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401975eba6502d141b351b655019c4e455f4618a51ed577ae08e18d49ddc5310. 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/DEQ022391406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4309d6f81e1b4635be059f7f44d456d795ac66721ebb229f0393a4e65ff03534. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2412203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5188a88ae7be023e8077c867d69e579f3076b92667ca56f60f357ebe8016106. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USANG2463159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1240a7660832f65678f7cc8d2ca2d78cd25ee92cb09e8c41ccaee27af4085760. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USANG2488221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0febf71a6eafda0173b6464d81900e33acead213d8a4817683448faeef0345. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US3DF2571032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae61b786aad2efe9fdb43916d55377fc67e8d6c70ff360c53690260e2bcbf31. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US3DF2586355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7c41b96ff6fa310d6fa150e45d1d09a3fc370d50fff94cdbe57b60bb2d834b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/US3DF2595782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2a5c7f1dd99b9ce138480fde8998a2f9701457c61388f149b4496ca4733a73. 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/UKZGC2200503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1510901f76c0bbd25edb5b2014e0e83d4dfa1ddfdcc6c0fa46606dad0b2ef. 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/QM3DF2168487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6e15aa48391f892bfc9edd9f2e2cd9117f864ddcfa20f93093b5e7a240c785. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM3DF2205425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c645b334fd2340b5fc50337de67ac350f907e20358802da35cb48917b11dfc1. 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/USANG2223289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd3be5989f7eb1a06162648f259eb94c921329cf913724c56646570773b5591. 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/QM3DF2142011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe640ad5cb29e20b7b3227de7d4529075d9c89f6d05ba9e8034252c4106c420. 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/QM3DF2128258.