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 0x0ad2827e69632468cceb1b04ab8cba2f8bbd6c88fec071c5c5a665142320a02c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cf7bbbc-7e68-4c16-80c1-6c70ff15f6a8.json and https://artists.proofprofile.net/proofs/artist/9cf7bbbc-7e68-4c16-80c1-6c70ff15f6a8.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 0x6358f0a22d99ce0516272af1779561af697882bcd8129f9beea75c184be1bae3. 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/BCJQG2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40c821dc611969c12f99a37418115a1947ccba251d20e946570aa45adc1ebe. 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/BCJQG2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d288afd6e338f7b190aceb9531bb52c811533ee431c5ca8eb4ff193a0db9fe. 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/BCJQG2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df701c7ce9628187dbeb348d1c384fffc549e64fd0443fba8b488b82b78edd. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/BCJQG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a638b87db9bd40170aae3a47bddf57beb427d7751050f7719a277cbaa3c6b8. 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/BCJQG2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8442c92b9abe57ec2078fd92fdc5095367a8b5a91c9b27f794b955d993a247. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BCJQG2300013.
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 0xf36cf5d14f2642aa3fe3445264ef136ef3fdb06092c498218de8c12f09ab9f5a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BCJQG2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c956eddd27bb4bde1d34c1d30ada08a4b09dbb055ca4ebe324a01a0d143fe8. 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/BCJQG2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d0dc387f448a258b18d7ca04366cd417ab70e6880788e17e19c736f77b6f10. 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/BCJQG2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49ba12174555bf14fe466dfef06cfa5d2d49f72da60061c8812e4f04b85096. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCJQG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950708614f867a24d6f9b38b5e7e7ca108bdb10fbfc7cd6eabe673e75e13dd13. 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/BCEK82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27d753898737aca1f45b8bc0cf61e3c629944ac27659fa13de47fba2b7f79d. 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/BCEK82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a5c50a79ebfce11f034a0fcc06e83351790725fc12eced8a86e1ef360ac62. 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/BCEK82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b2ae8baa9330c3cff49a31aaf8fff7b174330c8f35afabfd20bc28c199ea8. 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/BCEK82300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb9141572a601db1824eda247e77a9e9c65547b0e3582c8c1e03dd967729bfe. 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/BCEK82300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e10a418fde9c4c68a55e62022fccd771377233bc444cb6e4af96a12ab7353ef. 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/BCEK82300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50e79250ac78c18c8359541933a88476877ea89683ee211c97d527072d08574. 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/BCEK82200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabd27d50d70884c28ab443c00de6e57ec11f3aa57857d0326c2c1e4fabdd0c9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCEK82200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ac8ebcd5b37a83b4acfe2be653c6fb8b2abe4874fbf1c90d37937f1a4df4e0. 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/BCEK82100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0c705984b9b54af9189d380d45f765a815d183f16f28229df7d1cd7da56f3d. 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/QZHZ52054831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06c811ada304d5808516704b140ae9cd4e4e8ffef71f095d233d4e59308bfb6. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHZ52054832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b294b49988f18c86f25c0be8b72f170cd5696408c935a5309a3adbf5133b64. 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/QZHZ52054833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c8d41a4a00064fb3002dbf52f30bfd8624df6cdaad15f99737085101b6fba6. 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/QZHZ52054834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d90c7fd494efb10c3a7572df20ba19297d6b019305f762b3d513084a4103dd5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHZ52054835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418fbca783bffe1cdb0e08936ed9768295c446a88c2ee873d2a2731299d43ce2. 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/BCKWD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816685e15801d08abcb08ff606c030a4327a988459bfb18d6c7574c08e3e1916. 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/BCKWD2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232b9868d048f579b99d0f4e584d4a213123c88f255fce4fee96ce42c2462b78. 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/BCKWD2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1b6dec5de8cf2b18f4f0c0f61d6767a093ce39c4cdebf55a3170119dd0e125. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BCKWD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7594873bb4a01b1781c553c607e56f74f2e61dbd6a6e82e64dfca3a222c47f. 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/QZTPX2279553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dee20f7601d00a7d33802bc5d62ca5dc774651c94be4de5c45b5033bc3e538a. 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/QZNJV2132361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d02ab938c55a91eb49377e6d9f8a1e035957ab187fa688a5cf28b42e260f88. 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/QZNJW2431342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69df6154923671e41e3bab0c94222f215a8ebdcb46cd5b5df605f866557be5ec. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZNJW2431344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cabb2aabfdb56b71c3c22f20ca1417232236b5b15b934c8a26449c030c63a3. 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/USLZJ2429635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148e4d163f6a5200da0b9ace91bcef18eb892a58855dffb002d03335796283f. 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/BCNA52400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0616f33c29229977655022c500d4235f66df0dc71789ff4f29757a2a4208347. 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/BCNA52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8c79f30b11dd617a0f2962988552bf7fb378920101e0b9604c19433a31a2e. 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/BCNRU2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf73fff7058527ce347c8519613d7189761a070e68e6429c6144e2d9f6cf5794. 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/BCCZC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9447111f5277799904266608676aff7a0c021b6c05ce07359537cfc252ec39dd. 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/BCS8Y2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7702fb10f787274bd100b732aacd2665b5529c380de9b3c5d3a6c7091d0cd685. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCS8Y2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d210b9cb07e6dee86b29b0ab7ce05f96665daf1abe92cfc637e9d01245c8402. 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/BCS8Y2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff03f78aca7df1b8f0178f646a3bdb9a783fea7202e1ed6a93440b4e352e86d7. 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/BCS8Y2400015.