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 0x37fb778f33dbf63d5641282c2a079f7b13066ec38436664fdc13520873e46ee0. 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/7e22036e-784e-4f5e-8af5-1e254bfa6fc9.json and https://artists.proofprofile.net/proofs/artist/7e22036e-784e-4f5e-8af5-1e254bfa6fc9.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 0xe8b76cf569f461ed16a850620b24e8b3f27f92ddc92256f6e44c187d71a18737. 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/QZK6F2425963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfd4e6adda3e18eb01ea2a93d69d80ed7444c3215ac32f7cb5869f60581d35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHNB2197284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f41c2c10bfc263e68a15550bf7fb3fefa5fdef5e0b64e156715967472ac65. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZHN32134516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0b3951200c49754529780a5893f6217acec72b32bd2f662f42e1aed8783a3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHNC2159295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71f7a1576e174dcef7fdb8d340774c5a27d340b07ce735eede2916c105dcd8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2097734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5746097995aae0ae53e06523346993bee1a1fae4aa0bc8f1e76ddb1d98b2065. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN82118643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfc8eb8db354ec41920612be94222d6145515ea096cd28cac75d1492c9f0246. 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/QZHNC2159300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd489a940d70da7771bcebfccc6e2e9d0c0e279dea0138e9d245d7d527d7c7900. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYZ2055428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3a9fb5fd752648aa1ad08ffa374d2b6290e615744df62397541decf5fedecf. 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/QZFYZ2055430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5aad343e9a790ff2eba8367084f19cb93cea3f5bbe383bb6af2ce564048adc. 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/QZHN31999637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edf738c9f50968572a805e6dfd3850d8cb626facdd0216b4faf70e471772067. 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/QZHN31999638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d2b300b06a922d695f40dfdbb47d273978ae1be796f64eb3b94c25c18ab4ab. 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/QZES51863900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3e566e2e6cfad3f639b2adcb1a4821eb6dd10b8b6b5f49a021851696d7fd69. 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/QZES51863901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29958f5b0a6f7e732dacc65d94cf6d0149e965391ae42fa2e407ba7d6a6fea1e. 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/QZHN92482739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35dce7f8a1d45628c97b9fab377c5b02f0c1f492d183187d1af05a299d73d6f. 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/QZES62434273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266b0262f9bc2f9b3e1d8c2c1815cdc75cfd919ba02011ad85dedc71d6440aec. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFM2369083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d1f72a165813e38a00924bf5f6f8c13bbbbd259379c9138348bdfac0d4ad90. 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/QZTAZ2269094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6231dbe8ed0a5ec15f027ddcbfcf085e574a7d589abe8f5f4ff2afa62e63c. 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/QZTAU2222626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17c0d425f91a36983fffb49a61d2c7e0f00fda6648ce1854c4c77055788f3eb. 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/QZNWY2230459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5a928bbbecb230184010c222cf56ddb83583574a333ada0a7cc3ae1287f10f. 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/QZHNC2249321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfd4e6adda3e18eb01ea2a93d69d80ed7444c3215ac32f7cb5869f60581d35. 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/QZHNB2197284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5746097995aae0ae53e06523346993bee1a1fae4aa0bc8f1e76ddb1d98b2065. 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/QZHN82118643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f71f7a1576e174dcef7fdb8d340774c5a27d340b07ce735eede2916c105dcd8. 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/QZNWT2097734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb2acc1ca5c9b915d67a4f57108f7f29c743205ff34c1db034efc5a095ea0d. 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/QZK6N2011631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1ad077aaaf19256e8259387dd41d507f8ca05fee5d2f780e2706ba2c346e35. 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/QZTAT2504797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e866312ec27dd8169f1acb38acaf1ccf9e64d0ac133aee4a400ed5147ae8c45. 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/QZDA62555361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e40d958c712f867756b68a68b27b3a03c9ae7025c7ca6de86ccff48eeb0fb4c. 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/QZFZ62586937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6ffe9f1a09b6c1b24442b265d3f6072df7c71e8902100f1321309134ad5283. 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/QZZ7U2433592.