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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921bd7061adbb19d4f4ada2b9c4ca6e8dc88916924d7665e42db2cdf97a8bb9. 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/f539fe68-65e7-43c1-82f6-698a4ed19f56.json and https://artists.proofprofile.net/proofs/artist/f539fe68-65e7-43c1-82f6-698a4ed19f56.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f53c14d60240fc3b77098857da40d9f535bb1a8e6a0f6198e42f6d08f9a67a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPEW2499762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3675bf4d9b00df8ab2045fb54487173eaa1ea0435fc2b7b160e3665b183693d3. 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/QZPEW2499763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e45f1fefaf7a762eec0c57a68e7d6ad50ff4c4a37b360ce7793773aed179593. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPEW2499764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07ef9d4553aff016e8b471dc74f2524dd5806bd8a5adf6ddd58951f400121cf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZPEW2499765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567c051514e7552d4dc0a2d1a011b17add7bd0a99e783cec93e89a56af2b18e7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZPEW2499766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4289f81e9246dc6d50c4a035b252db032f0279ae3d2a075198098b620deb9a58. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2499767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0c78c34c689a479c4b0137a067dcc60016d52bca7316f19d639934b94e5f1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2499768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f711f4e1e47a87afa6b8f53693c0cce56dd0541363e4b8b0bf3d3401fe91b0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:22Z), 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/QZPEW2499769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f0d6bf6aa881629267a6df4842cbe2fb95a5d130fe6307a01ff8e4037b908e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPEW2499770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a733207b0a65270ab1139987461f5bd49a1e0aec3ec84550596d9370ab86622. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZPEW2499771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f618dd65fa0761a22169d417950cae639331c865d106045e6795343975d7b4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2499772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68e50fb339d8de8a3b06c2474d07623d6e4b8070092bac5244c361083bd2d33. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:51:46Z), 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/QZPEW2499773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea5256f79134e76754f0a2dc84aed5992e6dfcd167a949e7d674e75e18c8131. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2499774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660610cc59132ab4e58ea8621f25fdbdad678e7904c77343d9cd818c1324ffe9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2499775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5e8d9fd67589dc95dad64f056773847c93d08a40f95d7a2b3e0d8a275b486a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:33:57Z), 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/QZPEW2499776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c027d0adf541922510ba0eac972d030cc102f392ec89441c4527cd0820a8ba. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:06:08Z), 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/QZPEW2499777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c8a83a02e8647200541d190216c5231cf77e67c3b80c1967b03ba5b8a00721. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZPEW2499778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e20e33fde7ee995042ef39a07d5ea41c6f68a41a5a0db910ae3552bad8935e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2499779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabac485287c96ea8ec7f5966a6b5a53cc6399eda0392d60c7164850261597713. 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/QZPEW2499780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae0c240b45f12df5af6011ce91a4e0de9b234d753294e4202ddb050dc4b9d70. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZPEW2499781.