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 0x4f276fc26735f31bbf0a563e1e5f77d7fe552c742337c81e83491ddd8e5ab97a. 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/cfe54c8b-9f43-4692-8787-a67428bb49a8.json and https://artists.proofprofile.net/proofs/artist/cfe54c8b-9f43-4692-8787-a67428bb49a8.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 0xd06f435921da3a5057b9338622af2431aaa20b7af83c5816d85abfc061743f54. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USE9C1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76d4e511da5c2b4748723a29f47e3423736fa5f095d75940b0498af790f1307. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM21748730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cac27ba1ade65600df1349ae97d2161acf117d299c31cbf185c6546e481fbe2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3U81800364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30ba1065401644663f19ac5f8a1516bea25fbfb47168cb22786e2943654e28f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:16:58Z), 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/US3U81800371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaa59ed852532197b40f008c1c1cb5268046822354d7e92a6f96c09df435e9f. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:20Z), 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/US3U82000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c0dca674a96ad6d57c0890a26ecac850a3706ddf072475186d3a55c9613258. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US3U82000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53765965cee1ed8ce7c6235ace522c325258af61fc36133c57d7219408acfa7e. 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/US3U82100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66469081c68ac74aed3591603891dda50acd4dd4d6acfe0c3cd5030484266487. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US3U82100183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25bc1c333fe4aea91dff81434036dc428a70c621fcb7214ba4f3c1b0f6b8ac4. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US3U82300335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f317a5260b9deec895819971421809bb5e73c18c12d88922235aa38d2330eed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3U82300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa424ada65e5508b9b9f5fb014259d8dd24a893037dfcb6a617d6ebf08b3a18. 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/US3U82500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce87552c569cc6660496fe04be8774ab3ce56064b1fdd509a8cef9ae03dc3f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3U82500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa90ca6fcbb7bcf186f3c3b9cdd4725e60305e78995902e4ea1a7c55ad283a2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3U82500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8879dec9b0a3e52ce7cf8a1b622473435af8950b5d3c2a44d5837b5686172768. 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/US3U82500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172824a0277ecbd5c35d95f120055a6e76bf0498c70141d542bf4dd688bf74e8. 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/US3U82500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220bcd596ddc98ad2830ff9551c338c36a65b8ddca7d8ddc47a0eafcf6c2528b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3U82500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467d8ee3aad106dcbca9b98b01c191a9fa53432600dae30215e8ab18e88f4561. 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/US3U82500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a643be4675e727df0a9981d74862f0bbfa3a60728501b6e693075812cb5765. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3U82500091.