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 0xbef7e511214e78b37335d35806836302370e46e4bd546417c42fb9db4a5be7f8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e2a7873-60eb-4fc5-b254-e1d9a3b55535.json and https://artists.proofprofile.net/proofs/artist/4e2a7873-60eb-4fc5-b254-e1d9a3b55535.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 0x747c60b35888b42087c1cd08a3e4804a9d56a1e6b56add9f17df2eebf2315c76. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/DEAR41176029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26052a3f24a0a330f0f077b4f41ce9538d5b938557ec043c5dbd3114a0646cf. 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/DEAR41225574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d238bf52405d9354d2e89334c51ac735744ca28a91de47b9c0addf34c6b5acb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEAR41233184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7391470c8ecd5d8a83eed541e421bfb5e069342e138489ecb75fb35b51c589b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:20:54Z), 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/DEAR41233186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8901b856a486709af1eacaa58de0f0adaee05e81c867f97a74aa04d0d995d69f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:30:34Z), 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/DEAR41233188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf02b4a59e28a74eed9689680b4df430ecfab562fd3477b8bdae961d05c06aa2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:56Z), 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/DEAR41233191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a75d83b956d05c76a43a42e07480ad274919c01e3d17a3dd0986d752e63d4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAR41233194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff316d0bb60bbf91149adcd65da0dc9eba766628e2dab29811efe65068fe4c52. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAR41233196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef52d73ecba2a1d1b34a9ca8ab3474c8c8b084c6bdb79f0c38a682269a90aa. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEAR41233198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe657d908719fa35c89e081670f6e2944e949346a02c6cacefd74179dfd1c93. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEAR41233201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1baa76bfa89752ce91b1b32954ddb5b0e08bd5fde7b9b0f7c5ca44e553ef1c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAR41233203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3666ce4ad078ad1902a8e6cff2e2a54faa76cdb0c06152f035717288ffbd84. 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/DEAR41350774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a11cfd7a34ebe80b71987ce46018bd56e2719fe3df72a344acaf253c7a272e3. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DEAR41350776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf083a403dddc29ca26f022b8e54d63d9c708fa2e56475af9ccdf40750b1fcb46. 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/DEAR41415813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb986d09459f446398a614c5d84e756274248bd6fa6d158c2257211094c6948ce. 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/DEAR41431294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7d4699a56881c6d658c35eead1344c17bd7892592fcf3f50ccd1a85a76c58f. 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/DEAR41431296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d7571c86b90f42a8fed2a181c7afcf77f2331694fa9b520c48772e68987a2f. 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/DEAR41431299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e815e36b67a6792f7a012a2930ec79bae29d2a79013241d9c36ffa6ed7a13d0. 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/DEAR41431300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578da96165665deb08e3c9b34a7b9328e9852f3df7004a8e58cb643b1967f794. 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/DEAR41778948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d708e490f13bc7723103d02118f2edcf5ac702448c6094e63ba929c2bb55c02. 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/DEAR41950018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f9b974cf79fc6e061fe52c37eb3f3fda941532d1030402472fbb5901c3e116. 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/DEL712000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d66b492dc794fc6bac5ae44a260543bdc651aa4ecf605587e15df76579b6b. 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/DEKC41400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900a5a19a41ee019da120367cfb4ff2cd97d7b43233cbe6a5e904d92e40a1bd0. 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/DEAR41322630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd3a1790a1727e51978cc131a5fa00dc9eb2766ce8f637aa460f39e13d690f0. 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/GBBYB1301354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf056ab928dab9cf9c4f782d469b87082a99dba002893c53596f4103d8513f32a. 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/DEKC41600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68f9288a05bbf1082daf07d1206f9dc176d9350042c2e6623f94475f82a8fe. 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/GBBYB1301358.
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 0x164d88273d2295f4c8d20d49bc1368a4c1ecb7c0401b802f60452c3911d7cc08. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBBYB1301357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe523bc599ccb6e608a81d6305765debc440c3b546a011bf9dcd6b591e9fd7bfd. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEKC41100747.