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 0xccd4db6404dcf5a2a70b0feb6e0bc2658e88b2c3d663957c4fe6853b9b11ea85. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/732912be-ccaa-4f9b-a95b-d2548cf5c11d.json and https://artists.proofprofile.net/proofs/artist/732912be-ccaa-4f9b-a95b-d2548cf5c11d.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 0xa8473c9d3fabd6f586abd709feed7fcf0fe5a96e06a4c1847e3946d49b880131. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM22198938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138346ae7d4c74eaa9dd31b7d7f9313997a16064525224c7a173fd95191d50c8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USHM22198939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45244a10f907bad5cd291a3b5e6599b1f2dd02e6c8c8f37e5b825bf739cff52. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM22198940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c6b2d1783d1c7952d30dc55b7ec871c590d46414e64338dac3c3f9562b0eb0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM22198941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e352730b0df2a124345c13a7f3338c20a6afd7bc532509a1d968b19841f9cbe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM22198942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bc34b2739bbb017144fe18eca1055e947614c5e3a733180dc52d3635a32c9b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22198943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612d8e7c03763ee4489bb1fa6bf450457bfe6a4136fa39825e4bcd4fcfb37955. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USHM22198944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fcb98faec705d5d120ae3e47bc436fb3d5691e057a9220406da3312e30c745. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USHM22198945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c01449aef19b843848deb1d6936dea99f48c943e4691b6afcc4e50e3945f7d3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ITI810750101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9664edbc95357215310d76eb9a3066e781b15d4f5f9fe8d46a19eab6706f2e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/ITI810750102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed410d33ee4441c5edfa0467917c68b1b06a1719ca052792279b214f2893e8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ITI810750103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d694d129366654acbdf558dadb3e6c5da091fcdf4bac832dc3821b2296ec79. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ITI810750104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382285b5c708a71db5dfd594a4f93305f0b1048737fb0771848da574ca084199. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITI810750105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c0971280e9c73846c1a206b929932f6b5748569aa03ed3b62afd9344397077. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/ITI810750106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3936dd762efa37d51be3485b690d37bc459889890745bd89c43790e4a7a9661. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ITI810750107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb91939463d41876c93d4e75b93f30a82c5444cbf19da0bd9b66e83f61c157c4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITI810750108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66569c5ee8b8bf2877df78ba879a5e982edbe2b1d024966b147fc7301a3520. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ITI810750109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1352080f355038abada8a1f06e2777c3249d131b835246ee8d49c3b33db07ba. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ITI810750110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa048745ba755ccec39af552a6823a84d746c75f41590d1ec59a01255a1b8b8e3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ITI810750111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840050991022592b690fc4293bd93fb5ee825391fad0eba426b4ec2798064d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITI810750112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21efd7029a0e5cd6ac01cde23871b699b52a4c4673e08b0f4519a91c540c3f16. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ITI810750113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebf29a91e795d54f6ae528741c13f3cf0f07f55ea6c4f9c92aecd89dd8fb24a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITI810750114.