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 0x2bdb60f3420d98a601ecd7b1eba36f42c8e6f0d477ee61de97f42a00adf9c3c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9097295-694a-4da7-8b61-549eac8d83a0.json and https://artists.proofprofile.net/proofs/artist/b9097295-694a-4da7-8b61-549eac8d83a0.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 0x809a76d917d57ae40272de2f73a7b48a8b94549c53ebd0b5c26187c0f36268fe. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN92220277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8851bb527e9e70d51451d5543d20167fd4f28ca0b3d1fa013ce7e180a4d5c60. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZHN92266487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f37eaa760098665876df88166825faea5306d4e0dcf7a28a19029a2f98750d1. 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/QZHN92266488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f670d4f2921a97d8838c08c2bdd7edd1ab54d032f0781d1d61adb53d9a797d1. 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/QZHN92257893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efaccd250b0694b32ffdaced6782a4a81134651b5ca69402e9db8d4999e3f46. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHN92266492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a57434677e4aaa461ff3efdd0d81beb7e5716cdc96d3e38e1e6914185d4514d. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHN92266494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ffe05a62b73eb8a051bc265a134cb8dd569c71437f930bcb944da44f79941. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN92266498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232f7732ade8c035cdeaf9a9995a650594ea8af23ff2be1c30071125255ee932. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN92266477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f18b8159256138a6626b4f35b06ab74a6f60d173dbb21ecd53845ce336201d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN92266480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23133f96d821ebd039f23142f8f9960ebc4c078fce10d50e35a4e7fc98ec4613. 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/QZHN92264575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e918069a40bd1ba9ecccf5bcae6940cfeed6d4e38d98a4aa3a8f470d0085f1. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZHN92264581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f5c568cdd14366da2c287b5b60196827e00682c5106716a1efc4606a2197ce. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHN92264587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c7bb32eb7335efe3ffbbb2eb374b75c05a80aef96691a1db1934d2753463f1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZHN92226055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1b54571eed8272c78c7e0999264d2b6b7352c5b792b38a9b8ce918201ee44. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN92246460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d99943ff3a98cf7967954d0f14b12f0bbe1b36bcabc2ac53a567265b90a2dd. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/TCAES2076695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa550cfaa5261c46f82be5992dd99ae9ee458efaddb27fbe9189fdfc42ecc06a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN92247303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1bed307821a3d7e534f9b31f4da6132985bbbb11871e6a9a61cf41218e277c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DEXM82104335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7c77a09c1da8a64bb52a1863b1cc219c62431ff7cf97b5ffc9a4df4ffacfe. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEXM82104332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0c824ccfca67b698f971098328bf4575e8317209211955d006b68c9d91d100. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEXM82104323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee78f8073e72fa8c39d2a61036744294c33e07ad9546cc1da687b2997c0ff2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEXM82104339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd432e075e505828eed5e0852d408f1a4ea3013793ecf65323847058b753c9e05. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEXM82104249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48136927b8324ed8e64cbd6d25459025f68ba7983183e9cbc1e0b3c5a5232efb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEXM82104328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9dd3c4ef7f89a9420003aefb69c00773a159bef46a99cefad27cfdfc1d796a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAFR2146566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92710ce277928c4d46b532f2b5f29590b91162777a4cbbde4ae30f07328c798. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEXM82107376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcfde7de834f6082bcc89b8bdda941bca01df75564f6254e33e91144b485db. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEXM82108964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a1de4370e6309adf54af9a0f20e5259c5a9b8310d065a57f3d93d9d837fdf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEXM82300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc54ecbf5923285779d46b993f54f2900cacba08f628ad8d2b2ef8becae27bb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DE1KS2500718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9c24b50d6d34f2def0dcecb58aafcbbc2eca885c4f5573d8faeabb0b9487ca. 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/QZN882547867.