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 0x3e14f27580f6e6f1047c3c596f899d1db2586f0b8d6ba10de2b43c1aa5983133. 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/60bc5f9c-dd41-4ca3-a138-1cf63e9b563c.json and https://artists.proofprofile.net/proofs/artist/60bc5f9c-dd41-4ca3-a138-1cf63e9b563c.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 0x3c9959358bcd75b18f84695821b3e3cf3353afaa64a9b4906d6d0b6ffc02645d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:46:30Z), 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/ING211003606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0352b7b4be4e9cbc6d4794003b8de17af066b9aa0bb7383329c4d0112d5522. 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/ING211002960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf5bbf9ffd18c76d3e99f9922f24f3653e37e2d05cd228108a544347ba9524. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ING211004189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f2ea6058ded2ff68cb718e2dcd068dca3e972d7127d70a78e1afb882460d92. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ING211004932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ee22f2b431bf7ca9b29e00570835b456adf6d0182cfa95e5b9c2ea77cb187b. 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/ING211004991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ee22f2b431bf7ca9b29e00570835b456adf6d0182cfa95e5b9c2ea77cb187b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ING211004991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b75c489014b55e0b7380cbb660691d818d1f85c1f2e235e69903b568afa2d1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ING211005774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427c6f760961a36b873a13efc9aecb1d3151300abb6baadb3479b4f027bd2b6. 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/ING211005736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8cd57bcefec028e9125b98d19803020f7f4a9e57f9745a50b33f6b3c9d3eb. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ING211006898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bbfedee6e4b153df550d7d12081457f7352d42f52ffc1c4ef23d9e6caed3c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ING211007632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f4231e4dba8aaf98c2c5571837a41acfc07645705357d6a124816318d3f754. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ING212200365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049bd3743e4c2f7ca1a712677523250d8ef771c757a1f26e2ef0e127bec88813. 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/ING212200371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7acd81ee904571939d07495a89b7bf32261aa46819db7804198a5f243222366. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ING212200533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6727378310e76dd9e45d98311d314ec05888f057a35cd99bb4ed49a4813403ac. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ING212201084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a833e2898daa4bfd6f93c1a1ed55b668047d23b62e172882da6f6757d66f0b9. 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/ING212201449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8be3aa3d3fd3f41a5f87382b71c446c0d2437522600387d130932e73c79213. 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/ING212315517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22919754335f9054213e003708e640b11270bf66c20cf89196d7be0d6ea8e26f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ING212401243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9056f401eadeea2317df2289cef91409d9c57ade2e51fd124447629c0524d29. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX202545128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e7cafcce25aea6b07b05a106bd4b03b61861008a9215fe83d99df0d6726a57. 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/ING212533192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4a80b80d06c810b4170a58bb1fe17c4d66c475fbd8f9d8dd861d30ac3555a. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ING212534401.