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 0xd9850f06acd3a750f7296fe52bcb4eab7314dba518b1a615a6eceec39f58598c. 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/674f9806-4b60-4153-b5a3-e9e9c792e9c9.json and https://artists.proofprofile.net/proofs/artist/674f9806-4b60-4153-b5a3-e9e9c792e9c9.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 0x1cfb4aeabb9849bff3ef83f807e3585494c0f5ed45f0eccdb020127da8c19b23. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:44Z), 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/FR2X41794096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d64599a95d18998a7c71f7ffc7748588a05e5bb47980ce569b1bc68b1584a. 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/FR2X41794099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d319f49a566995e2306f0469d249812a0952876e171373d8a373ed0c172cb43. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:26:57Z), 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/FR2X41794100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ff9d498f5fa6a4237870317d408c8e8c9dbba816a445f48ed1d14bd46426f4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:54Z), 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/FR2X41794102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e5ae23ba1a72f57209ea92ebf4031e8af31f22a5b96b5847ffb8fea8506092. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCADR1812461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55580f2f6d133f01bc0a8287a7b7e3298f46a6437a062c54ba5961c3528e4e. 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/TCADR1812462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d738af420cf39e89cf7639e340aeb9850d63e1e3ecaaf4005d5c0daeb6dd1. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/TCADR1812464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbed9c78899e66d61950351fdb465700bfe145b5b4e3aafef24d6f164223bc7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:30:36Z), 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/TCADR1812466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebd3a7dcedf46588d2631c633059003e29844bf18e3f86b0af8d35dcdfaa4c5. 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/TCADR1812467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1a5b78c0a4be74d1908e6cd2aabf406dd418bb3fc00a79b63fdb5dee595b30. 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/TCADR1812469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c86eaed5916c44a7cd222351cf689e378cda9f60adfed8506ca581432d3a7c0. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCADR1812481.