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 0xa0c56a6acc250d0100784bfd04a06115d732f77ec4ca4ee188e8d3628b42fcd4. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8abc1142-a4c8-490f-8b33-27c0f703e0f2.json and https://artists.proofprofile.net/proofs/artist/8abc1142-a4c8-490f-8b33-27c0f703e0f2.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 0x98badc3fa4bd7c9d47fd1f8fe71211df141020e1e62efc4e033bc52877805115. 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/USHM21710759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19c7f70a16817734bc20620777d9099967232bdd6c28cea74b22f36aed596eb. 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/USHM21710760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cbfa65d37d78719288dcad7eba0fc134f57ad4c6d3cec3d87431e48dea5f37. 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/USHM21710761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d9fe585b25d7547280697d0e1e76c041c9712f639743ef3bcdfb055e279a2. 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/USHM21710762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c7ab4e73bd1507a15f980d9c0b447a8050bf58e4b65700270bf713e9f4e0cd. 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/USHM21710763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf3280231fdda747cc0a2be7a119229c91ebbdb2f57e5f03f285532eac71ef2. 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/USHM21710764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fff93b52eca24f1621e2edd0c371c1c38d3063246e160f9fc3f6d83e56126a. 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/USHM21710766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdb1d3f3588d525a2bbe485fbea52b287691df88e264130d970443324e14c66. 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/USHM21385675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8997806885c46deae6c3a462c53b1a90ad3e8216dd0279b0004361ccefc246. 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/USHM21385676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea8d27f184829e57b39a48f1dc1e4ef0c8a5ade11daa17779f5737b3fead60. 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/USHM21385678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0a8fd128e07bfa83860ea38ff07226614c8c8ae321d59f028114129daebc9c. 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/USHM21385679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c8eb5dc04d998e8ae344921ca432d74b1da202d3ccfade9c0d49b595672ce. 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/USHM21385680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079d74499a3ffc8a4840fda5c054bdcc3cd097fd0149fb188d48591df9094e14. 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/USHM21385682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1ee190277e7341542e1af5006c4e47234268b8e2c42320cd76ad49b5e92aae. 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/USHM21385683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f296c00ecb9c4fe10b322475cb158ec32fadf1adfaf7dfdd8a9f2defa12db3. 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/USHM21385685.