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 0xcc2a573e2633fee0fdd178296b964bd36b103dc7b974bfc2e1d21a17e5b8133e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df12d2cc-d30b-42bf-be52-88f14d1187b3.json and https://artists.proofprofile.net/proofs/artist/df12d2cc-d30b-42bf-be52-88f14d1187b3.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 0x92ea46c7a6f203232690781d118d7886c2580686d90160c3dcf4d1eda3bfc974. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/US3DF1907962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b0b6f58654ce3552c9a733f61564c135b3ac78f8f0255d4cbb73364ec772a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES31G2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc472dd7f770585d9558d07544a2c460458a43bb039e36e205f6328ea04da3f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR96X2194218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4222d6d4a8fb4415e9d3dfe69363f573c868158fdc79392d84b699225de31db6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES31G2012001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c967846b069721a3c9185f284b3ae2d942219e83785c25fa5576eaa364f52. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLH8M2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7375e6a12673e7c1660d5b19ab04244abd517d7a2acf2d6899c251f2df23df. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEIW12200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732f26dda1277994ef9c7e3e3b4199606f409d18ca2ca9b9e30eb11bd9933177. 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/ES31G2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5737354b70d251c94bee9988df32bc60993c0f3c8a7eab97d47830fff46bb8f. 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/USDM32301251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8effbfdf1169179b0fa1dd0dcd1b2e7990b4214c625822b5f2012b4ba2a6545a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESUM72302697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80a6ee9b144dff0cb984ec791b207cb3cdf8ca15ca6ccf7505217fac99fb692. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:37Z), 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/USDM32401351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a83b841bc240c8a8165c2c6769cd140d01aaf9d8ef739790532009677f35c3. 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/BEIW12100169.