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 0xd4d134d3764c0ff3ce51f9bf68484dbc81de821d78866a8c293f4b23d05fa1aa. 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/727468bd-124b-443a-bdbf-4a9202d42bc8.json and https://artists.proofprofile.net/proofs/artist/727468bd-124b-443a-bdbf-4a9202d42bc8.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 0xa1d80a37fb0dbfd9700e7ec2f2d58fcd06f9975cacd8d61b539ff2465694ef45. 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/QM24S2305569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc0e33a5c1d82c445880b9dad8cdc23b9b5d6ac9b6b723a6c17bb0e6bf3af5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2304339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00601342145e9097778dede9032d51b04cdd5f058633d9078a9fe8eff5dd6d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05acc0bbd6ea639888a35e578f479708b3840d3afab1e6c8431f7ceaaaf14c0. 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/QM24S2206217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e63797aae3b87fb2576b0816792419e052b454cf9e38706fbee06d8b318562. 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/QM24S2202964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a79a55e6c73072034dbdfa24f2a94ac5b5dfdfdd87586f77918d7babe556086. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES82250800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8d1cd4de467fe07033c4dbc51e075f8706cef2a6779f6ff0a4f986efd67ccc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62281496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d47400933dda9cc682b14785fc8551dc1b1bbade46c407abd3c266c17d7044f. 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/QZFZ42205729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0889f3bf3c541647763a77f87e5adfd40ae84510df809eaecb1d980266b4febb. 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/QZTAU2131497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed324d094314076083d8e16d39c9de445fe61a2201b91e1d16f2d32dfc15f9f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJY2182299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6f959ea3c5e055b2a2cd302f1bd66d1c958a9ddb0119b6644f466b68f306e6. 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/QZNJX2103774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a216710c598802066e593d4421693e1c20ea0e4052e650efdab6e420844c9d7. 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/QZNWQ2102285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafb2453d9dcb28bf9d1eabb6a223fed795415ff2e004e185b491c0b7e27fa01. 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/QZNJV2161116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff6fcf93f0f84b1213b8de466c40c4c40b4780ee4771be4cc76cd47d1c807b0. 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/QZK6H2120600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ae7a4f5c36141c5e5d42f69c03fedae188a4cbb8cd88f7064650588fbe5f8. 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/QZK6H2100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61cd707faa652195b818fe2a9cf29bb95b4ac463d2c8f29e2b3945329df858d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMZ92101039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b346751ca0afb6347dbc38b32746ac3fddb27671820b5e257c4ad32446bd61. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2149628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb8b1e4cb0edbca5bbb9885258aad1f46ec884fdd813d510ca593fb3d9a3d8f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHNB2149629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88795a3d73a10f9c21e6b7ecb2ed11659820eb9673a8536b78c067b16d27a7f2. 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/QZHN52176782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85664c05fdf66b38482dd0c2a51f13b3671a8b3a2a2c4dd08075ef9febe32049. 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/QZHN42129001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee015252607d1b815fb4f90181e84865287b479f500fe311036eb1ae8413da75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA82157369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffa03e52ee3196274732a428162cc3c68743aec047ecd810cf381d9d7a96532. 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/QZFZ72131741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c610131bd046a4ffcd0616d24d00a271870eee343ba2e5fb6b10720cc8f142. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFYX2162022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e812b40cc920d693d0c47ac23ed81a779190119599249f9cf7a98260190b33. 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/QZNWY2089674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51371923c2d440681a0251252b5f6cf967c057fd286609f29a87cdd2e633d625. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWQ2069539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfea8a86ba8206c12d8ce68593310c7df3f324aa88787f22dd6feb796b99f92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2401666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca6683bf981ba7659e6fd7a37977df084fdc809dbaac2eed3709d6747790631. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEQ2308099.