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 0x264a67dbdc1e218fa639545c84b78aafb3a48c442ef2c23be151a2a608ca15fd. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb581802-31fd-4f7b-8ce0-245705b5f9db.json and https://artists.proofprofile.net/proofs/artist/cb581802-31fd-4f7b-8ce0-245705b5f9db.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 0x8d2a6296523bac775fef141bc5328d6274338df18144af415db53fe26b89e18a. 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/USX9P2032385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0568df1ff98ad85ca22d850cb5c6418a7aada8ebbad335d5f97edde30824e837. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USX9P2032386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa300a87d75126431a14b83a7621051ae61f986b3a997f18ad0a93d5412b90985. 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/USX9P2032387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9221839c4de76455b93a64a719391e0265950fc0b687b30c2ea5eec7792d105e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USX9P2032388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113d7b9df6b2c68a1ca6d7d73c25215eca90aad900464029a8d7a259435fa9f3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USX9P2032389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfbe5cad69653112accc6cb272bcc4dd5b9cdc60ae58a8bc1998d8ffb11d7cf. 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/USX9P2032390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51d8dd19d1c798935c93f754fb98c913e762bbf6dd69b648ebda451d38203a. 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/USX9P2032392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9b8f69e39ab2773da1293c0939f50ae32b3daffec6b07f966bd18d78e805e. 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/USX9P2032394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b15939a5b8e52836a7a676d1741f4f3151f13ba55e83c7c88bcf3a04a0ba5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM21500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b9bbf7fa25d47d28f8ee47ee89f79866461a571ebc497e69506cbe23452f1. 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/USHM21500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1564733d529ed473fa6ca7cf9d21acbd2f7835ee8aed3c045ad2e91515c4d26. 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/USHM21500305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6c6dfc0f30bbde5ad42f980758e78728a006a1f793a7bbed12121dfa8ecb12. 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/USHM21500306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa1647162e2bfaa98f58cb81dff66af03f4333cf95078704ddff2d604a72c47. 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/USHM21500308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307628dd2f592b52d6dfacf5e4b7e592da7e1c4568e443b02ae3a6f75f18fc8a. 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/USHM21500309.
Damage Done (feat. Sabine Scherer & Chris Clancy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8703c323f7e99bac42d2f61b58cf2fc65ef4355b7c1d7a6a6e509286e1b14e4e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM21500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a55eb1a7b26b4efe22563fa2a0ad04fa06726f82c3506a91aa57380d4ef149. 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/USHM91207937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88e9e498d0e049862451b87ce1f158df49f02648f83ed556132f96a14147a8b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM91207938.
Escape As Deliverance (feat. Jon Howard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620dfdfb9c46d829603136a0a400aea9abc5043a60f22b6d03aefbaa68893d40. 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/USHM91207939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995523f1667da58559dced878d3d1ae556316daeb6af948f322fed7dc37b0de6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM91207940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac5f8187c0cda460fa25af7fa3f73b7d65ec3b7de1d58b1277cd5f60ef72748. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHM91207941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069f0682b6cb35505e179a6a8755b6a0567b3c80c54fb33c126c478afbf46336. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM91207942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db730fecec0e85ae535eb0e25f47d97888d9b96809b6e6e0d6fc06401b456d1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM91207943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3732e7d68b97a960fd02940acfe13244cc1068813859c4b8f6227a873dc97f7a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM91207944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0abace2b1bff899c5a29b4d1331de56d384ded3baef68cc0e171788a267c526. 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/USHM91207945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc09ea542eb3bbdf15277f7f31d303dea53816a904ef51a81485ba19effe3afa. 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/USHM91207946.
Love Is a Battlefield (feat. Björn Strid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad7cf62566e5d8127ea055ef50bb4d5da0c7e82428779b82b9254d369fea19d. 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/USHM91207947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb10f1dd7ff7f78544e07ff60f4cc033ec424b973ac5b2b42a1d4515ad58ad. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM91207948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f094c9f549a06e27f0ce71b33a07d9c3d82c1aa91fbfb74021a87a10ce2d27. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM22438427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ffa4c605a3fec3ffc9e0491e36402f487faddba42e7f2999ca2efa33b0ecc2. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/USL4R2390131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e322bd2fa8decbbb14ee4bad525afe2f441edaf95d54f41fbf3c78206ef98cd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHM82156732.