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 0xdd528150c18c2305facf84e10b8ad34ddb3797bc0325a47e487a5062612796c0. 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/da871d0a-cf90-410c-92b1-9d4acc35bc08.json and https://artists.proofprofile.net/proofs/artist/da871d0a-cf90-410c-92b1-9d4acc35bc08.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 0x1cf9e3c927cf399e74df2bebd0113a6d26087e59d9d7db374ac0561958e3fd5d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB8KE2421359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6104465028bb0dcdf243563c64805d9c1fc3f71f70d329aba084ee4a2ec73b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GB8KE2421326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0710c4249f1aa6e2a272cc1a163c7717dd0c8fd6fd1aab8e408a00a5f5b1570b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2421872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0020219c7c471b8106269dea6d145352f2ee0509526a7b68196a67114458d74c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2422280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbcafe1f76dc0938691dede5f8fe32afbf51bfd3d0f236b07f33d784ad9b035. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2423616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fcfeafab861fb68c839256d81ea041247873bcc5982436026c1910733c3ef1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2424906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2958176b1697b2c97b559aac02ffc5a25a3c98e39feb5197d93d5947bbd676. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2426424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e418f0b3581e3a67f97bb07d1e46f60ce36c687295958abad3d522a02c2bfa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2427603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90bdf28dde1d67a7df03927b76f53079b6af382e625291393809e4d7ef39871. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2502863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960e34d34d763b076eac1e77c3a2ef47b6cdaabca26d19b783ff267e99134fd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2504261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378037c1fb2e49a8cdae81f507112fc7778c9625f4770461ea85cbc6ead7bd28. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB8KE2505139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a8e09b8c9d6f05216d1926bb35856874a691889554ab442823aee0a98df378. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GB8KE2505502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb7362186403dbaa915fa50369209d6220da37a7b0969c60a00a5bff8bad9f3. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/GB8KE2506555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3b12134c55d73d0aedd53ef5d55020590e2c61a572ba39e1c941a0857af457. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GB8KE2507042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5673a69545078b722220b0dee13e34aa9ca51607215065e95855504a9a53c5d6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GB8KE2507043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574af5236c6ab2f314e849b87607c67c6b065fddf82cade2de57241d28138ae. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GB8KE2509663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aacf1219ea3dc96908d503a61735cf1653239eb2d2c1437d12e3bcb5bf6e96. 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/GB8KE2510044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc068127ba2eb7a88a8661b3355a6f4ada248169085b05e8af2edfce10762a1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GB8KE2514064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd219018adb333d9b51ca16a1861145737e1ab5152815c6142647b85436cdefa7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T01:09:53Z), 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/GB8KE2516808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd2defc4bdbf2db2a58fb5b413bf7a1d8dd4e9408c97c0d0106a03ded9689ca. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GB8KE2518647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2983560b38e7e7f83fb675b38eea8aa7519d271db5ad0f8dc712d8f2706eaed3. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/GB8KE2520312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1833b9776e4d76a8641d4384a5dfb5d88fc58a80d8753cfa57d7a46bd067e0b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GB8KE2523694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd108589ae35dec24e252ba828076463a8a980cc8eca754fe21247a023b40686. 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/GB8KE2523695.