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 0xa3375a1a4543870a10c5814cf62722a50f57529888cad8b890e2eed9b03b9eae. 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/0f56c6e1-aa0c-410f-aad2-cd93af7c444c.json and https://artists.proofprofile.net/proofs/artist/0f56c6e1-aa0c-410f-aad2-cd93af7c444c.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 0xf74a359e470cfbfc823f46139dded42e2b32a7e636d659dde1fe367df0d1b5ec. 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/QZNW72414606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c7a109aaf6e4b255d754bd410e914a1ffad92e492aaaaab9ddd55edc80fda1. 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/QZNW72414607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b66222d88797cf9b64307e3363685abd58868112ea9169741712d51d746c6c. 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/QZNW72406672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d25c9f95fdb9188f8cf812d6e421f2675cebbd8f70ab557b8689a87efc5cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNW72406671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772468092c16c8156486775241dae071fda84c61e22922bac3c1225844bced14. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNW72403566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf525248d20aaaf7512b89e4aca54b4509758fb133009c83466ed94e34a3a514. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNW72400888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa145c92c9192324f9bd11fd81b9dc4ef2aa3899e2990b54b9186917ad51596a2. 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/QZZ972462311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146ce1e666c001e17a7697c0656cd7185c30d96388d3673b0eef31fe43562fcf. 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/QZZ972438164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef72200410af9aaabd411b912d90eeca4b60ff7d00d615a5f2ed97f0b5957d7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ972458274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900ea15ef7730f4d80ede64f9bb95ff43ab489d9c6af3fc29a2129647e73ee1f. 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/QZZ972458240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb597f9cb8cf2dd77bdab561cbec011b5733ee3aa015e92f12d4d1db396ec2. 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/QZZ972459089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77755072dec5e6665a12722f02ee1802c7a49232c0275c4ef7661ece1f5f0a. 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/QZZ972404025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe23e92691e1097fe00e6d5f9a733ecb514247714595ea66cc2a4ac123accc. 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/QMFMG2329991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8475c112d868ad5845b76d42cfb09782df82151a4e905443990b29c36e7974. 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/QZZ972369836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52786ac35321147eea884c9e200a969e9b8bea3d06321ec2b40d1801fc9e0d60. 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/ESA012275682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1387902cb3410ed546603fb1d1d40010119651faaa477de6b22b97afc22ba9d. 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/ESA012264990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c924034ad088661600727bf56ecd25895ce666fb94bd0f921f8455c8da3aab. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESA012234582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370ee7f9dd0403350045bce20d42fd2c855a208e32cf77a6c8d089fb91aa675f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESA012264986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6623c5b529325d897c636930e544403e10fdd2f0f716637f60f4562bda55485. 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/ESA012217842.