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 0xa0b060cb4a3504972beb4940d7163bb62a987015f9b08774949805f1f6e326cb. 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/c88f933e-ed45-4ee3-8b95-c0ee4f589bd2.json and https://artists.proofprofile.net/proofs/artist/c88f933e-ed45-4ee3-8b95-c0ee4f589bd2.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 0x7436ad64e19fd6ee7899f1d40389cd18dbbe344de1c130053fd60b14292c7b2e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEXN82370395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe661deba4eadbaaf8d0050605b5da6fce8cf9975f7fd25e98ae03be2097aef. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEXN82370396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fe08b0c2464409a1e698c06eb47d18f8c1dea0dbee9609f6ca30ce4a3c042c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEXN82370397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50699cb8bdc8ba7135349704c8d26bb8f0c623fe25daab5a4c89665175ff60cb. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEXN82370398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26e07f4f750776f68a8a9c50d6caeddd0e79fe7a47b3bf6eef27fa57a1a9d7b. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEXN82370399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b213550d620e59624ab17b091eab49baa58d94fcd5256f39b31ea9991b2e594. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEXN82370401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e916b84423d9ddcc23bc44cfbac1008d4b7157c06fc4df8ba5a357c9e28215. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:04:33Z), 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/DEXN82370402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec6801915b647990b559ec5471de335f74fa1f1548603cb431c0b2a986cf014. 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/DEXN82370403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c8fe9e6abb1accd120ae18e71ce7955a57c7710eb3191abc77ddff624bae8a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEXN82370404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc8adbea46b00e9171f48395401f3c96a6ccb67b521c58804bc7c902733bc4f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEXN82370405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5055ef0c358b23d344ce984b52304009578d9201091250d40bf91f04b4ddd040. 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/DEXN82370407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf475d52e8520bc2ea67c4e1fddc4f96ac97b6e470e2773e9457eb5427f866aa7. 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/DEXN82370409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a32c21a03f04dbc1f224e3c15c85c85a808bd0048b48b8249e8623b3968c1bc. 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/DEXN82370411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f1ed9369b11911f2ac00c6cd4bdf90125db27a2c7ee779f996454d289b0809. 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/DEXN82370414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3136437f349c1a8f43cce1d321af4d44da90bf51e0328fd22a4d38f75669d2a. 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/DEXN82370436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4883466a8fd2a05fdc05ca7e2f19723617078b81f4b91ef6b72c65ce6fb3bb1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:06Z), 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/DEXN82370447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617d69d9bcc300bffe275793a40960cd361c4fc4838a9e7f5aa221baed24d349. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEXN82370450.