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 0xf34758aa8c47b6a9fec3f403098fe1d378bf7da7f617a5b56c39b5c7413ae626. 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/0b5319b6-1185-4608-b44a-f85cbf651725.json and https://artists.proofprofile.net/proofs/artist/0b5319b6-1185-4608-b44a-f85cbf651725.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 0xf00b27524a2449e937efd1be446f7eeb63c6793bf2bbc5cc57ecbf02189c7c5e. 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/QZMER2484769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e468cdba484888a0b4e5d92e04f97b8b9ee511def7483cdb61c06fe75461a. 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/QZDA42445011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483f4c2dc172d30c70fcd224ff04e429288f1f280628c3b9a9388225f5e1ad0. 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/QZFYY2438667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280245200cfdcddb104386a21b09f4721b7d6630ac377b5463e97d1c15f0592c. 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/QZWFF2348825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0c53fefc9fbf7f91e4ebcd248e7a2cb9947423c843c251b17d2af7848ffe6c. 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/QZRP52318875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b19e857e94010eb403d05bbfe745516b61ef87d5e436abd5d27af7dc1faad6. 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/QZNWR2370117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e271a54acc927ed4aac48647c49bf9739701e54d29ad30e790143a6ff26a645. 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/QZNWR2370118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3529cacf210c2ef53535906d53134ec511a3f85540f80cb6001fe5441f5831e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6M2340242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7310ce507bd42089686f3ea88a083feb0376433a5f9d3e1dc178000eb45e23. 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/QZTAU2249566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d3460ad9014af745a09a780d2cae042644e351ce6b924424557d925e991636. 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/QZK6F2270764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05654b8297ac19e30f3023eba59c794aa8fd295d03ce9798912b2bb899977efc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA42182081.
Head 2 My Toes Clean (Rasheda & Hd4president)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54bab5cea7981b4cc24d4925bcd736af7fef3b47d4745d97b9d87695c945184. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:53:12Z), 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/QZDA62115460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d9aebea517fa57cbfdde879f0a77a90a13a503f89c7a62014f6978c260160d. 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/QZDA62115461.