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 0xe6adb3078fc080a5b859e20d964a72c9d67d1b5acd3e328b08ab4d3a038321e6. 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/9e50eb2b-07db-4639-a2aa-282c2f5df125.json and https://artists.proofprofile.net/proofs/artist/9e50eb2b-07db-4639-a2aa-282c2f5df125.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 0x5d4e7b2dd11d4574379f86b89a5634bd8bee7f650ca342beceb66e0ea795b63e. 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/ITK1A2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf741c39453e6fe7c210b30106f586b94f27d54b3ec23146da34c69f8de5759. 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/ITK1A2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493b48d4fbf46342fa4624cc71f6d13ed0a08c269e749dddff0cd57f41b5063b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITK1A2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47721ecf50025d728d171117a44e0102c685f3ede792923cadfb32b8c1efa787. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ITK1A2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f00e22af9c6b5f2c4bd148921c83149a34647561998da78a1bf4aaec53cfc2. 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/ITK1A2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaad9ae8e0772761c4e3db4935bee0c6679a423bd33177a0737d3c9d6aba0563. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:01Z), 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/ITK1A2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3a4bf317f8dd20f71452666dfef14c56225902638907cb367e35638f374a8f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ITK1A2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc011404d3f14f44b67d817f6517762ec297e0685c4ac4f02cf72062e3ef5ca. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ITK1A2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ee0a7d62f08ee394e87769650d85b8097019663a52a965ae7bde83e649459. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITK1A2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0a003b349511e156fab6391ac95ab0e03fd73a663d6491eb016a732cd8a105. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ITK1A2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1102a9661c3e884112220b497565cde0209dce1eaaf04373c4b514be357b21a9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ITK1A2000160.