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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378057813a9210e9badcb119736427401eca6bb8e8de7aca55f824af73c1eb4a. 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/596e7b58-027e-497a-8a7f-772b69fbdbe8.json and https://artists.proofprofile.net/proofs/artist/596e7b58-027e-497a-8a7f-772b69fbdbe8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a83872d6e5fe912631c35b0ddcb05fb8179a27ec51d2298da77fdef48c9cc5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BKLUI2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7da2ab7922f5d0c37e3d2a8e1ff6d07a1185f7676c3db2d5b8cfc819000726. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BKLUI2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568bf9f1737fc4f950a7d1a848598feacf0142be26caad42c3ac85be37649a25. 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/BCM9A2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49e501c02fd4aea8d3f924646fa71daa658d1720ecb8596c1a7bd0bfd945974. 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/BCM9A2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d95af628ee4ab40d1fa74585255ff15113a72bc0d15a15cd3d923a7f579e962. 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/BCBBK2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9945a475a7a993bb36512ea2aed88574534d09cca717c2a41b2e374d6b403b4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCBBK2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56887fc199164296f852b1a92f74ab881505bb2a46ba3e9b38563f67ce1ec4af. 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/QZWFE2329053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce4c248ab8e69f687f8a3a1056b744369ac20e3a7c1cf21199a7c1360c8c3d8. 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/QZWFE2329054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c0b9a1c798a65dddb1edc82e7d45cb04e4e2bb09165351cb5ca7ebb7e5d39. 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/BKLUI2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79e456e04c2aff13a6a8255cbfeff12c0fc47b9cf250a9072baabc329fd2b4e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BKLUI2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20176959f9867a30ee01406bbfd78df4c6a6bb4ab897ad82a0bdfa67fbb4fdd6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BKLUI2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc545cd3612832d86c8a7525455c704a7e08530c979daca8c1b4447d4ccf38813. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BKLUI2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a1aad41107ab05418fec578760d2e4ea9eca2753b435190e6036e444dec475. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BKLUI2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6164da18a1e8a54d34c9f95f7fd8fcd23eaee5184c9850e4f88b677147d43. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BKLUI2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c0b9a1c798a65dddb1edc82e7d45cb04e4e2bb09165351cb5ca7ebb7e5d39. 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/BKLUI2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a429d5adbe609dd5cf78419829830590c5bc6514a85eb052ce137465570536. 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/BCJYV2200001.