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 0xd293fe61c89234a753f1af316df05abacea948ef1fd67b3084063911a8f5c0c9. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbec35e8-cb73-4b75-b276-5ce5cfa805a6.json and https://artists.proofprofile.net/proofs/artist/cbec35e8-cb73-4b75-b276-5ce5cfa805a6.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 0x9af5c5c2cd23fc903374f2a05ba3aa564b295befc91bc81093a2b65c7addf366. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHN32028147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a7fa967e5213b552ccbdf2663f2bcca20e85398231a85b740ed2c9f5e8c4da. 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/QZHN62054173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6186a562575af188037b89e8bff0fa7dea83834bd1414c3f729ce21927bfde0. 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/QZFYY2156765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d420aee5d1b427397dd88e6850169918e720c5baae9e3bcab89167cc6aa0ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92189328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad7b1d4d6ec21a03ac79ee39970d8023737872c6a6b16fa9e141c00e9fd6a7. 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/CH7811606976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953c8f31638761ee56111ae7db594adc1c056e5f61c804535daef3eb634ab623. 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/CH7811606977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac1b5109634e7a1baba9631b17eac01d6bfecd16722bd708c74d51c0dfe482. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7811606981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf22ecea0546d650d4d94385ee67f52b0e3bad8af254fd86fcd3d29ff735e14. 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/CH7811606983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47551ce25ce25224fb7bcf4c223ad60a7997b82f7a9e95a9948bdbcb1d503f. 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/CH7811606984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7201efca239c92bdc5d37690aabb7463e4a83b3764d426838af9cea66769ac22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7811606986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f571d14ac752ef8827e20964e99d73088c243bbdf35e9ec6542bdeac1f2eb5. 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/CH7811606987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466ea9e6d8faa821d9a02ee880321d75b66293a987e4b7735529b03fb0d35f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH3461205161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311459ce8a62b25f0d0a802bd4378c098e11f5e60092710355fd678303329703. 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/CH3461205167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f3b9167b4a0bdccb1458cdb9cb4d9d24a5f90305456bb151b2f1ffa0c4719c. 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/CH3461205168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188a2938c6bb41408e826e9a7692d068c31e4b9c8c7cdb3e5eb8d71d67e835a3. 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/QZK6L2186670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6186a562575af188037b89e8bff0fa7dea83834bd1414c3f729ce21927bfde0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYY2156765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a7fa967e5213b552ccbdf2663f2bcca20e85398231a85b740ed2c9f5e8c4da. 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/QZHN62054173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af5c5c2cd23fc903374f2a05ba3aa564b295befc91bc81093a2b65c7addf366. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN32028147.