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 0x8576d36e33290f1f8dd82dabf5a68723552319522f9fd7096788224a9eaa1df4. 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/a1c27a74-d73a-4d7b-a418-e8e74a2b1806.json and https://artists.proofprofile.net/proofs/artist/a1c27a74-d73a-4d7b-a418-e8e74a2b1806.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 0xe420305743fb239a00c2293ba840f2addd020e0b4e8eb7b1bd4a9fdd9ee4bdcc. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:04:10Z), 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/TCAGD2278586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8f278ef425cd3e43504163910d8a1743c5a74619a83c687154353eac737de. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAGF2220339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a0ebd7538919d3ea576c0097c4234dfe967b8420786d244d607ccc206577bd. 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/TCAGK2287741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a32ebdfc324ef09fe5381e52da9bfc68c5aac5576cb578cd4fff70c155587. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAGQ2205847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc926f4d111a8e0e9ef0f4470b61816106190eb611ed31142ad2dd3117340eff4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:05:33Z), 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/TCAGU2342526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ae0c9a1e9eee99e26a44408b5a8f6a52511e0b6f7526fbc3c2602b694e958f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:00:26Z), 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/TCAGX2393628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ae7381e08ab48f774a781d3bae35391846460745a2c7f5ef1fbbdf41e58bdf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGY2385721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827b5dcf3a35a758bf00a38a8a010958434e90ddf70409a9ef07dcf7716cc810. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAHD2365410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1981ac368c49a7fb9e283fd5b36e6b2ae91539fbcace4d0ed6e8ec306a5bf8c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US23A1571271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eeafd92ef00aed10eef7e0bbd16b253cd070714a3f5bb2f154e6064bc62af7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US23A1572777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f58791f6c532ea176592d6de53e52f85b66b951e69776739f238b691099f126. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:40:05Z), 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/US23A1572779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353ae65182d40597372b68ec4ab0cd548aa26a5197f8c97cd162c2282c7b2265. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US23A1570686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f18e4897212824768b3a4baad4ed0804d93f21fdbe60bf15bd88f1d81a2f99. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAII2402034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec404b6d68a4377d7fa464e6a7a0d8638676f0a09dd4c016f380a9349d05a94. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:38:03Z), 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/TCAIL2446054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7958816e67e5115a87286ed790949fdcd82bae001294d6da643477ab27d2c205. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:09Z), 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/TCAIO2401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498bbf95894746ea3ca136a7694d36282c77afaede0dac0c7bdf737f82485c2b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCAIR2467031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66c9cc7b020ce5b8364f9fd4db8ae3f7fc15bb57f68ad1a89cb57a9d3f2d420. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAIQ2467035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52562aa3f76947281a0215e21897dc10b6de235c5c28f52cacd05a9d86a3a46a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US23A1578366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1974af5a6087a1beb9a6ca64cadc93cefc61ca1a9a5d344923a5b0d197176. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAIU2432997.