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 0x8c74ea163bd939048334b19fdf6ac8a8511e99fb935f19076ed671f89873a4ab. 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/ed9ef5bb-dc6c-4c8f-b200-2be8f045d546.json and https://artists.proofprofile.net/proofs/artist/ed9ef5bb-dc6c-4c8f-b200-2be8f045d546.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 0xcfb5c01aaa005a6e07ac1646d17f97339841e8c32f09dc7865631ba18c1b3815. 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/SE62M2175560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c30345b64f06cb49ef72fe813e9484b7e6b7f09c6f4fd5cb52a3d06daeb6b6a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5752261849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c7c671b20a7a2cebb2515840a510c91ec018050cec12d4271d8cde2949a700. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6HN2279962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14b84d9d45da9e2b489cc8d657592994aa35f734b1dc4e7d98d391e1590bb43. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:31:55Z), 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/SE6SA2228587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80b46db7392af50f1d883acf71037d105485bdc4aad397948a10fdc612d5d3. 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/SE6XW2279566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21958cdd90ddeb3e33ad95b7ec573cfab8266757fedd9d58bbc5c7c145a5a6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE6XX2267669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae31f9d7d660b0d09b90b3888c4050d55a075539bedbb35483de63cfb1a1a5c. 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/SE62M2175362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c30345b64f06cb49ef72fe813e9484b7e6b7f09c6f4fd5cb52a3d06daeb6b6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5752261849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13182532736b452f0a2ed3df224e236afe159d5eb7a52ab1c486001fac6eee0b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE6XX2267685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c7c671b20a7a2cebb2515840a510c91ec018050cec12d4271d8cde2949a700. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6HN2279962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974065efa9050c4976e1ff0fc0cc24ca0b727fa402d58b2194bf4644b316ef4f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE6HN2393897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ef29422c8bf7f533bc8b20238540420092a5fe5d587eb5d7a18d30279bbc0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE6XW2358921.