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 0x9283419f63e71dd73ac78b766071c213dfa45bb071803a0851abdeab961d1b27. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e81f15a-558a-4d0f-8494-8db618e208d4.json and https://artists.proofprofile.net/proofs/artist/5e81f15a-558a-4d0f-8494-8db618e208d4.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 0xe254d5a243e3fcda939ff8fd687cf621a41899df8b2a1b2b1f253e6759581a3b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA0M1907880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e805ea98f319758d29e925d8c9aa3b3fbb6eeeb1bf947a7799765cbdc90675. 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/VNA0M1907932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a1fa036b65ceb371c2606dd129d8bbf76457e4b6df2c9d262343f89240081b. 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/VNA0M1908479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4b1fc6c6ae2cf50d4b36bfee1f22613c8d4aead2e619939d1b801bdfccdd2c. 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/VNA0M1910060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feeab39a978c39b823e93414ce0b73710b902799b556a807700183fb48fdedf. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR10S2316898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d0a5f81e7f3e48b72dd1f24462b2ce5e05e3c7eb91bff263d403a8e3eea7b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/DGA072431640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a105d92cec1e3388a9a7ecce502accf395c5c77e0d843d1ba6ec0538a7d67c. 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/DGA092439188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e6e1dff76d1fae0f04ae8104c037eebd9406de535eced63d45e6a732946ff6. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DGA092439189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7d361ea1a01cc4eb2f57c1187a19b9fe2e5578b911191696fe8d32e9b57c47. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DGA072467438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe836d90fd521cdaea2f652e560d9904e26ea59b4b3ec42e45fbc4bc2b44c08f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0L2455461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd56b4262a4d09a1f88eb968494252c4069291a00d75bd6a7a60a72739cb91f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA0L2455463.