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 0x3dd246cbb5d24f727b5fedeb03e43cba5f23c0108745b639c87279ae0544c646. 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/f59036e3-59fa-4181-a4fc-f68ce67cb151.json and https://artists.proofprofile.net/proofs/artist/f59036e3-59fa-4181-a4fc-f68ce67cb151.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 0xe796c6cd14a4702a3a56fc2df90ea5b534c9493c0a2e66dd06a830421f3c5c28. 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/NLF711703758.
Bulletproof (Before Their Eyes) [feat. Mees Van Den berg]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aa591b922e538787e699a0c2d5ebb0f0cafde0008d2fffe79667bff81122ef. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GBSMU5667555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b2ab334d4326080da078acf235e60efe403e1dc90df57bc89d909c0adf2241. 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/NLD681902759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25c65eac95fca1f7b50cbee69227e4c9459993dd90d0bd7c8976258c6286b3f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKQU2020257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2b70e9e610140a7e23337fcbb1051c8ae0a418ad65f1c1617d18c51ded38a5. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBKQU2178216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e103e742dfe949b72a5a861ab4be5034a4135c55d274aaca40738176f99083. 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/GBLV62316365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b083582ffba685f6c2cd7afd399db2b12f3fcacf11a5962b0c0b94bb86367c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NLZ542400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44c1be051826f65dae648d3f76722c3840964fea2d77eb190fd8cee3620ef0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2408455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f53d7aee0d284ad8743bce5115a73e82a6fe9505335794c67a19617a5ff839. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USA2P2400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6250f2bd4dd889287edd0a806c9115f8b6c6a15357ce38a5bc44a57d0080476. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:32Z), 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/USA2P2400265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12b9fb7c808cb39129e9f452ac27a905beb02b2e94022269978852e65532f8b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBKQU2462903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339455e57247759a12bde4584bfa8ce59ee9e82d01bdf32286cece1f6ef36273. 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/NL8RL2439675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f14652402429920addd77865ae5a62a64bd2d652bc9bc96abd5ff002652b6f3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBLV62400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94396d7023bc1c65e46a0ccd77ba73e2f1bb12e10b641453ae1d8f2a9c2932fa. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GBLV62400477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58201606fc1b8f9cd27b9d648df5132b9d8f39ede0ab55dbab8f4b4ca67ffc5. 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/NLQ8D2400984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432621fbce613febc7510ef004077267511e48d8d5b6248c8bde75333cf55c36. 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/NLXV51301131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c056c681cd609ac9db53eb8bd7b8d5ade88f9f73747a6a27f98842d70aa2194. 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/USA2P2229281.