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 0x1f5c7fbc01a08cf4cb85483445f181ca2a8c63c7d9a10bc2340a48316fb329b1. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34496062-5298-4fac-a0a8-e4b86b6cab72.json and https://artists.proofprofile.net/proofs/artist/34496062-5298-4fac-a0a8-e4b86b6cab72.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 0xcab87df81356920fe07a00f647822d6424497e1fc04712abd4fda464c35517f2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NO8WZ2011050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee743058140955b737ae7e8f671c02f3c2d800f8e21f3664a1fce751fa940e39. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/NO8WZ2007010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478a26db2f6671c076e114eb2c91e5b6d7cc6fdb6f1e97d1bcd0c9a632817fdd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NORHZ2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fdea3727ee54aa5e78e4cb64711931324deccffef575464efb54e8d8061bb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NORHZ2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6efffe1758b9f7acb52fcb3327d0aa679cfb279034af550f83bbfbb4d649f2. 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/NORHZ2303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb675c81c9cb130d09f7a2b627f25c0ee6c2cbe5bf35fe334ef084a90ce6c871a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/NORHZ2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d0fd9f82b812fff9cb92563bba798c02f313a058b3b059c26c5a1dedab3a2b. 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/NORHZ2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296794da015a3e293d09c026f6a06cf10bf388e4241aaa5491bdb2b3522d2a8. 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/NORHZ2403020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a396a3f3819414b641422681f3c988912b343647a8b9a92abd168f21de88ba4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NORHZ2402020.