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 0x584db7fad8fdebe02e5556f71907f070dc82daffd317b03085d78e4eb099c6d9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47e16f95-0edb-44b9-b3a0-86cacb1b8b72.json and https://artists.proofprofile.net/proofs/artist/47e16f95-0edb-44b9-b3a0-86cacb1b8b72.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 0xd224df6d0e10d84fce18af784ae798a558e3bd2b34200db58293dd173758a25a. 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/DEKF22100625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b5ecc306bdb24d4ee367c61db8f9b3e3b7d91762f5afacb6dabe6c9eac539f. 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/DEKF22100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa105f9977b0b8ac6b7833bffda1395c7c7c24d017e47c2b3a4051bb264739d72. 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/DEKF22100445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08d2f24f88343b62c9c493a3f37052ca337660c2135dd879df75306a1171bb. 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/DEKF22100626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5944a60a0435d3c002399814032f6eac544160afc4106574c0fd9777e754fa08. 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/DEKF22100627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84c9effb202f6f040cb032763744e400c7e45150e3d724963d51886c9e084ac. 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/DEVY22300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335c53b7335bc3389d5d911e737e21055016e29e701addbc4c80687c9d9db680. 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/CH7812346296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86524600acc7d8eacfe70f5e8b03890fe172842f3b6330fae99580930dfb5537. 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/DEKF22200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bf977432429082ec52daf8349f9f70ce67c5060eabc3403681120933d4dac9. 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/DEKF22200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86944f6c7bfcb5e65ea9180d438d0afd791e9363e1b0532c1763908da8f29d05. 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/CH7812407092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03020f8eb561ea2f1a954841fd2a57ea521e052292b6b965178df2d7d19ff632. 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/DEZC62376931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a043dd8abb6f51fed40cb37f4d5cf8c7d2aba05cfe198d7690d7e5ea377927. 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/DEZC62276870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaac42aedfceb3f28f19c558938272aaeb71880b4fc7774609bfe4de58985bb2. 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/DELJ82076228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf5e3e8dcd78d575578776facf42a87d1114d940873a80b1b3e726421d2764. 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/DEKF22000594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f4c062512af827bda41e6a19aa6aaef982e75be11c6cc38b424f0d1b021dd3. 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/DEKF22000595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be01fd3f546dbba5e248d4ac616c4a8ccb3a29282505273e1ac1580b5bf4fdf. 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/DELJ82002421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49dcd9679d1e1f19877ac8777e90983679f822b9d6b1af143191ae4632f4807. 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/DEKF22000596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d616c3ddd539e6c2e4c43c18c324bccccd8bcc2be430ceae0405cb4b3f2c68b. 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/DEKF22000597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f597daa433e69b90f881aa8f451aa77743a990e4b9b9b2deb5d1908fe8f3c1. 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/DELJ81752109.