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 0x2afa0372424f11ee9940ee4b5b3dd0f7bacea81bbb536f556a5f5251d7e2f943. 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/eae888f1-8ea4-4710-ac6c-1b892d68b0d9.json and https://artists.proofprofile.net/proofs/artist/eae888f1-8ea4-4710-ac6c-1b892d68b0d9.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 0x5c9f1e7f2fd1f5609f8ce04f279c93b5334776a16df4e7763ebcab8b23b4209d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GX53U2402794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0215ce7a869b95bc9045c75bdbbc027717c8cb7aa040aea7fac1732d446cf5f0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GXF9Q2568432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9a7d7873ac2b8bc6fd7e8fb769753170c65ee86904c1c43f68be3792c4b4b9. 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/GXF9Q2568433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77175f84b8cd9b7eac72d3ba30ee804a5c6a4e68f1c1a4debd9d073218e92a78. 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/GXF9Q2568434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bab0a8b56d86d1c8bfb1171b1dcab082b1a7bd74de6c893893f34e2c33b3d0. 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/GXF9Q2568435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae23a59dbc856883efeb53fb83842a2a3474447d5fd5e0f69e925893d6e928a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GXF9Q2568436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce05f0d346537d879deaa349c95635cc033dbe32bbdcdff56a1a5c7180e8e6. 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/GXF9Q2568437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bfa54558c2deb2c9741c43177e085592b8ab0481fcdf9ca1a3d2719a41abda. 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/GXF9Q2568438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987cf88d23d52ae4321dffd2ec8efec87b23a1f727a090f45b338cef266eaaf8. 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/GXF9Q2568439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204274d2ad582f20f24e2c52cfa5685bae2ac468cfe2527f75eb7fc3bb355dd. 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/GXF9Q2568440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25baaa5e93dd7085e67e763ba82bce92b49c5313c7f4b326f65e4176db76706d. 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/GXF9Q2568441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0807473743c992c358ad63a0714b4ecf0860655d2cf5ff7be2900dbfe160b20f. 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/GXF9Q2568442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804ef45d393114bdaf512bae162a0fd27155b31dbd7d583524f1c6077b15025. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GXF9Q2568443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf599ac10ae038b9e78f471200b0187f4ef9e33d52d339fd99ab37d5bba67069c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GXF9Q2568444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d773a35eaf7005a7c5a5ad29b77fa424f6a18899664fe435fc828f588d82a. 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/GXF9Q2568445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab6c14c47cd830a25e9c34c6c5857e790858fa16d5bf6fbacda8ccd72fbd11c. 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/GXF9Q2568446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571a00c4e451de0e703b79dbd822661ef1bd4524f14d491bbdec7e1e73772248. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXF9Q2577121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28afeaedf96c0a7778307516024414c74aff1e9f68fcd6c98e88a6d1fc566e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/GXF9Q2577122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57f3ca176be6025ea1f5fe4226f6744431f98f78737ab33e49df122a14996b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GXF9Q2577123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358df4a6813805e1f45581cc4b0c0b5db165e181d0266cf123f98fe4cb462b20. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXF9Q2577124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83760d5bd53c32c37fcc1ad5058b2a5526fcb9790b4784edbc0a0f7ddbaddb94. 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/GXF9Q2577125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8206899fc1d91587ac43591fa75d4602af91e7b73d49b25546addf3b9c37f9. 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/GXF9Q2577126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04be2a7ed5ce5516565b61333a61e521794c766ae78f2e6ce43b2f34ac231a68. 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/GXF9Q2577127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669776bb39490175c8231108dd98bc1d9f52de799318823a44c9980dddf062ae. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GXF9Q2577128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62260f0302f8fd6087be6526ee2c85ce34e6460e4981511bf751086f50436c43. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GXF9Q2577129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00820c1b81d47ebcfded9aff3fecb2fefaa0a51c4b99c4ed632f9ea675d5aedb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GXF9Q2577130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38583f64931b82a196be51e99ef0a196237547ca8610c74ae547f7643c2a46. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GXF9Q2577131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22913a7db9142db9da5ba6067a50d7a3057927e1b4d79a267d99ea5a1cfb592. 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/GXF9Q2577132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9b9dc664b1370f6321ab8ab4ad552a9dbbde9976dea93b52ff0758ec1eaeef. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GXF9Q2577133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea9f3b4bfec43f3bc52bfe008ae61c7b34f05a4c86f799f732286928a868cf3. 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/QZS7J2514126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2047bd023caa8c433b47e611c8f4badedeebc9e865a5c79c660f885d3bd93db. 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/QZS7J2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a2a27e85a6c7284c66294ffc98d33ae4afafad435c2385cff447f55a8cf079. 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/QZS7J2537827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6c39f771dd36059a06da35fda08e04556142a451555ff81d419b90813d90e1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS7J2591569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30da71b1b1600004447f0bdbcf2f648c0fc4797118ffb6c0d14381ed5fac8d31. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS7J2553771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db5d6663c4612f71c60ecd36c7b409a6dd4bbb4d2e5429003ee32d5d1eb2b01. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS7J2518452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8802b52e244f5b0a6d8c0630ad42a8656bf09019055b013a162d1ab5c7fe022. 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/QZS7J2577839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90945b504b006c1f77a32e377a2f575465e98965228e70d48b25cc3261960e6e. 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/QZSYP2560485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad5372bd1f23857584c4d898a687f88529c3f942b2ab7f42404cb3b12ee57b0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZS7J2575635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2de019ec222a8318982223ca5c2ffaf6d2a765417977465247b083dc08f2313. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZS7J2548315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e52689c2ff799fb26a69f2f94ae3cb4baf27344abc39e5258c044853e7737. 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/QZQAY2553656.