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 0x19e0e1b042d34edd760eab68c5e7c20da294c430ff9720dd75cb7f5d6749d5e4. 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/bc2847c2-3446-46c8-b2ff-c62d87b760e0.json and https://artists.proofprofile.net/proofs/artist/bc2847c2-3446-46c8-b2ff-c62d87b760e0.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 0xda837fef30fcda3144e6295f4e993f45f34c597ffdd11e566dda7f80dae3c964. 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/QZQAY2470014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85b8925a6f3f551d8cdeb9350e1f4cafdc522501b27d779ba9f2292bdc614f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTLA2419208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607ad9bde2c56ddcdcdfe0f7242365d426a7b66c5b55aafe9c2c5dad09d412a1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZQAY2444525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94672e4a33c1b16bb9009084f3d6c2b8ff5ef717a6a7c57d69dddbe86b829adb. 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/USUYG1473182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821cf5e36afdba594c9f10ecd8c159ec66a271bf5e6f0bfb723268cab6620c15. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USUYG1470504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c38a5c131da1de9e7a17a12fed6b510fbd9a845dbe49a4912076de52876d472. 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/USUYG1386355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8a214f4e299ca1965c31c63407587f94a6693e863a6642ea79ae2f7fbf2f00. 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/USUYG1380327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3c222b0fe5343d91fe84a973c47b2acf4e04e66a38d78eae22c011bf606002. 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/USUYG1377037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58343da981ff89393ee27a695dab4a17dd9e4bce9413a7d7cbca1690c5aedf36. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-21T23:27:33Z), 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/USUYG1445980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85853bc96eee45a8c7834f6900a21ae7b514d50c15e7330426e378e8333831. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USUYG1445983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13111106b00fea3db1da9608d2726d3e3375f9add89c7acfc4e101d510558d3. 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/USUYG1445985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa5ac9f523e25865fe93ebc2c0a195ec6e87f0eb28c8eb14470dc50ef62ac09. 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/USUYG1445988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de25781f26b49ddabb1e7e85674aa85ae33076757b898c943f981e32182c06. 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/USUYG1445987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0499add216aacc50cdd5ace1bf8c541d5a2733b4be5c6d819ec01263b06ac. 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/USUYG1462769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85904758a5d0321929dd2905bd78fb37eeb28d259d333cbbc07bc09153970a2. 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/USUYG1462770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58343da981ff89393ee27a695dab4a17dd9e4bce9413a7d7cbca1690c5aedf36. 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/USUYG1445980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85853bc96eee45a8c7834f6900a21ae7b514d50c15e7330426e378e8333831. 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/USUYG1445983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa5ac9f523e25865fe93ebc2c0a195ec6e87f0eb28c8eb14470dc50ef62ac09. 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/USUYG1445988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de25781f26b49ddabb1e7e85674aa85ae33076757b898c943f981e32182c06. 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/USUYG1445987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0499add216aacc50cdd5ace1bf8c541d5a2733b4be5c6d819ec01263b06ac. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USUYG1462769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85904758a5d0321929dd2905bd78fb37eeb28d259d333cbbc07bc09153970a2. 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/USUYG1462770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd387d6aa7da7b389feb5bbf2f31b18eb2cfb4d0987c7e38d1bed894ebd475f96. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:51:31Z), 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/USUYG1485674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f79dafc72a2e2a47debc81fe242062a4ce872b48e47494d9022724cda868495. 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/USUYG1485671.