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 0x4d050df29be64e90eb89304933916d3ba363cc8da95154171c6f720d573a6e45. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7513bafd-bef7-4b01-8219-4b08f4ef2ab0.json and https://artists.proofprofile.net/proofs/artist/7513bafd-bef7-4b01-8219-4b08f4ef2ab0.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 0x6f611c85519dad445e5b08d4a7cfbdbac72949b335efb0f4e0206b1bc20dc212. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3Q92503554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa581d711e57b7659ebd2ab730ade037a68d1326143a2552d0779d78e8fd3f623. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GX3Q92503523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d941fd917a09b36030c6daa2829bece6d341e5184d9661adfe9ce989f0eaf0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92503552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61400f3cc7d0b0d4d0ae9204da6fb1b254cde8366be27227aa3c32d467826ecd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:26:54Z), 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/GX3Q92513518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d8efef895ce2e0c515fce30faebd2527f7dcd8879e12e784b6f934a00ba09. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX3Q92513509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc7aaedc77cbe5cf5c23b24782643553f6729b5ca9bfd9fc16b9c4adfc1d8da. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:55Z), 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/GX3Q92522019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ac1902bd585f187e01d7be1b820f6f3169d7c1af8b35de655569ee3cf8131e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3Q92522169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a5d9300d5f37ea21e9035fbfb30feb455d7e4130e133f3eeee6dc8b579c4bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3Q92522168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f522593b20f7cc00586256d8411586607bf7d1a1698e7cb298e6e868b0897e5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX3Q92522166.