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 0xc46ade39d1d64256866d02239bbe69e5d7b328c948820e371b4047456c018a71. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2075657c-87dc-4a57-9d3c-7f75bfe3112f.json and https://artists.proofprofile.net/proofs/artist/2075657c-87dc-4a57-9d3c-7f75bfe3112f.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 0x14e85403e8472c9d1ff7a1ed4766f57f2352dac72b889f21395c5f5ca87b9dfe. 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/QZHN72156609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b94f280526ce5098c06696427b77a132601e5708d2a5f118437e031d3edd3bc. 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/QZHN72151306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38eb3085e9b6216fc4e891c5df54886490a2f1f342c019ecf35328aa690eaf4a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA62181981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9fe97690000681cfd1dd16b69417d6e3e9062f8e106843cb5b54d294f62480. 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/QZFZ42107288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa23846bc43f28276458b6164d51e544fa8e74b193b19700e05f62b9f2eb23. 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/QZHN51942914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d26274bc0b583bb495c2e165ad892506d634779d692c2995425d645c5a3cfa. 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/QZHN51943134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167a5d0dac60d0a0c52bb9a1340865d6ecf5371a1dfffa25e77a4e70a857c472. 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/QZ8LD1980928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e2bbb8953dc1fc17fe5051b35bb8f83e1afbe218ef48d905df3a2df8dc3076. 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/QZES81801451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb670ad7f69c1a8111a1bc28099e5fd2d5197b729cac5100f79783c850e3c5245. 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/UST8K1813832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d07de3b1826016417b44cd0b9284055c3b07ac96d585cea7f3ffa03e9fd99. 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/QM2PV1823643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d69e3ad58bf7b327f3e417649748f658eedc2726e93dd41cb0b40e51b1d2f. 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/QZDA51883858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0a2076b567f5383d7d6379a9ef251f268528f9f995171bb01ad4ee27c2243. 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/QZDA51883439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10df3cd8f43d5562a01322c82e9b4a388e9279bf82ca5ab07f0fa20367e6d305. 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/QZDA71807943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc4425f13c5036f99e5a15dd29e28e9558ebef3cae864836986aa2c0ae4a3c. 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/QZDA51883281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74616ae27aa56284f8c4c05c77a594361e74a3cfff2cda243167d2ad1de0e09f. 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/QZDA51878116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd82cba37ee1ce9f4260c67369786645f307ee37aa54159a669dfb8351260999. 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/QZDA51883183.