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 0x1dab6b08a24ad7fed0c1fa099793e236683bdb0b33d2aa856815ce063b5b8ab2. 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/235388d1-f228-4174-8e80-b5c437b51e32.json and https://artists.proofprofile.net/proofs/artist/235388d1-f228-4174-8e80-b5c437b51e32.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 0xe163bb2b3843e5590e5da884f736968d95498c0032081523c2c9a29299820ca4. 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/HKI498433103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aea8e2391cf9cc51ab0c65d23bcf874e32a57443a34f5ceec6888051e5542af. 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/HKI491500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe163bb2b3843e5590e5da884f736968d95498c0032081523c2c9a29299820ca4. 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/HKI498433103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a743cadecd2770fccfc9aa61837455db7190a50b501f5e90d1628d1f392d4c6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HKI491592006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55234bb651af45ec3e5965d84ce3593286d0c3105ba50d1af1b1f0f8bef7dd45. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/HKI498121104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73529ba1111c79cb66eada181b52baf48da785fb96da8ee91097411c4346e98d. 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/HKI498021101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55234bb651af45ec3e5965d84ce3593286d0c3105ba50d1af1b1f0f8bef7dd45. 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/HKI498121104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6fa474ec25ebe9845b3e691971472a4adb1cc1cfc209f64bc05d7671acea17. 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/HKI498321101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c550c38dd4e12a3e3ed6ce38bf4aadd9fcb19605982f1fe63cd9c9eec990037. 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/HKI498321103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73529ba1111c79cb66eada181b52baf48da785fb96da8ee91097411c4346e98d. 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/HKI498021101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045108a85e3e839d2f5fb3e2c65ab123a9efe3a146205223e79784f0ea8af96c. 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/HKI498521110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a9f3e363596099bed2e3b52f89a840f7f616a77f546e0c8765cf589fcd9f60. 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/HKI498321107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a743cadecd2770fccfc9aa61837455db7190a50b501f5e90d1628d1f392d4c6. 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/HKI491592006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd374d6ba2bfa90641b99de89f8dd6cc783f9991990986ed55c7fbf789e53a734. 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/HKI491521148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73529ba1111c79cb66eada181b52baf48da785fb96da8ee91097411c4346e98d. 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/HKI498021101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a9f3e363596099bed2e3b52f89a840f7f616a77f546e0c8765cf589fcd9f60. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKI498321107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6fa474ec25ebe9845b3e691971472a4adb1cc1cfc209f64bc05d7671acea17. 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/HKI498321101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045108a85e3e839d2f5fb3e2c65ab123a9efe3a146205223e79784f0ea8af96c. 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/HKI498521110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c550c38dd4e12a3e3ed6ce38bf4aadd9fcb19605982f1fe63cd9c9eec990037. Chain 2 (Bitcoin): anchored in block 957034 (2026-07-07T11:52:37Z), 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/HKI498321103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc669aa082873e53b1b1fb7bb69358000a47c0e958cf58b203a9ec196f30babc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI491592001.
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