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 0x1156539f27ad62252dcf27f2f8e43d905ea3ab30af7ed7643d788fd98b8101c5. 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/f0f8616e-e243-44fc-8685-4e3c99f95aaf.json and https://artists.proofprofile.net/proofs/artist/f0f8616e-e243-44fc-8685-4e3c99f95aaf.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 0x0fa0e8f9a68986f92e8eeb93e3b7a27e6569baf0eb8d4a81a20ff95f8e043bb0. 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/US25L0700762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aa6a5f0416dc02d25280e96976fdf9939b403c5573f987423f898e936e02fc. 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/US25L0700763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59a194ca3874d7db0a73600261b8835e57a0eb1ea2972bb8bcae01d9f60014d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0700764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543dfab089ed924eab0c3c6e7a01d6c0d81efe64ed198cf7372a5b8c9966d53b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0700765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d6d007ed2e2c26eb81c327d0e9ad6b775035c2077cca7822bab319dd04011e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L0700766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b97fda713a7a8ab0ee14d95fac43fcea755b2aa0fc2aa9b688c8f89c8f44767. 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/US25L0700767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d45a570256bd7d07e145ddd60f576545ccbd4d68c9bd2f73941bd1115c54e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L0700768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fccfe2004e78d1f724b84bcc564cd2abfa070eadf65ff3f45fa32e2f65116a2. 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/US25L0700769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5d52760509b6d4460dd8cde96ba43c330e24857af2433308cf18180b70128d. 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/US25L0700770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c815b6dd232bf7ebc7176fc781a120f4d36f9663d751957c727c3acd95a0177. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US25L0700771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b7c7f593cbb6ffef9ca30db238dbc670aa7d5ea3b00ba07ed61770f2605d45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0700772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b8c92fa68c5416f26ec6bfd9d70ab5b9d9b8ddb5d34050d0151673000ddcd4. 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/US25L0700773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff15d56a7d28192a42770c746f6bc66def1790755368cc660c3d1f191c879509. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25L0700774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570b87afc749d9e29728a3ab0a0c7b581deb8d19d06df5da70f3854a8ece9f05. 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/US25L0700775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a8302a7fab0bbf9d5078eccb852be0c9d702f838912bcc0acf3e93ce79aa71. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US25L0700776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12346fdc14497010afe15db62fd91e11264aa5d7231b65a1c3126c3e0ab04ba3. 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/US25L1001458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b97fda713a7a8ab0ee14d95fac43fcea755b2aa0fc2aa9b688c8f89c8f44767. 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/US25L0700767.