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 0x31c697a42b6e658adf7c9c7bb4e624127438dffc174b50324bbb6f18fa664c59. 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/3db517d6-6bd2-4a97-a67e-5cff01bdb9a8.json and https://artists.proofprofile.net/proofs/artist/3db517d6-6bd2-4a97-a67e-5cff01bdb9a8.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 0x75641f9793d8585b37c6e24c7cbedd6b39836c92220565316d7baf1ef2ad9c25. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NL6DL2100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419c314af9f8b606426fc4ff552426fa5af445e1f703d50d8cb6551b970ceb08. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL6DL2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b2db010be19e2f0cdd084aacec4e886c978885a4165a7ffc4f31e04e1ea4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL6DL2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852a3329fdc7dcf91de079534c693d9f58b88feb480c700029f613eb599446c0. 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/NL6DL2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd343d0333739c09a70d1bbe17977271b6bac75367f38771eca40fb5d0adddc9. 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/NL6DL2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278c12a049fcaf807529675db586e4d3bfa3e46bf95def82d6ba39290137f237. 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/NL6DL2100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b2db010be19e2f0cdd084aacec4e886c978885a4165a7ffc4f31e04e1ea4b. 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/NL6DL2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75641f9793d8585b37c6e24c7cbedd6b39836c92220565316d7baf1ef2ad9c25. 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/NL6DL2100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab8ae488bee6c15a5142623984615a624083615745d212d3451b618185aa2ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:17Z), 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/NL6DL2100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9417eaf03428859afc476355ebb9f31259167b50ac9e4446ba54fc8d093cf135. 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/NL6DL2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0b29aff66dfd5d26e1785105697541f080f1740ca97d3e0823c1d090c9bbe5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL6DL2100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1c06c059e90f41b625d1aadbeaa2592e0e6a14d7baa217bfe094f7829ca9c7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL6DL2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911857ead302072e66b0af2d0df817ff35ce019dd109d1256bcec66f12451db1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL6DL2100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419c314af9f8b606426fc4ff552426fa5af445e1f703d50d8cb6551b970ceb08. 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/NL6DL2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bbb585c4355cd39d9e5318616b563a1d21b75a8500f8bc7e692215971ddbe9. 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/NL6DL2100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d338f80120e46f9b1d963db3f0f6507bf1c57ffc378a502ce8d1bbf1c8e9cb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL6DL2100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb524f8f33bc062f5a2a14818fa850ab3679c3f505eb1c7b450fdbb4d6edb2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NL6DL2100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f3960ea2e9b24fe6c0d0a1aa2955ee8f0372dc5999f6675b77136a4047b32. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL6DL2100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04dae0e482de85b9b445a3b5b8b93ef8840f8756e3afefb4f8796faff064d07. 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/NL6DL2100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc00119739301530099c388186fc40e2706186d29e3e7b544b1d3bcf5277d7b. 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/NL6DL2100108.