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 0xab9fa31b5a2b0b45b53fb3746f7078a6b4da35504057e601ba5da3528e288dbd. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/252ce04b-5331-48d2-bc61-1a2ca05a7cbf.json and https://artists.proofprofile.net/proofs/artist/252ce04b-5331-48d2-bc61-1a2ca05a7cbf.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 0xe105308ab1cc18e1d712ffb0f39eb9c2505069da4c5b4bf0a5b878e08b30a80d. 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/QZNWT2004286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3315de53d7cd30787a47a09e7b430438d00bfdd0f0ddfc229894b1e15e0804a1. 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/QZFYW2196248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c737c9ed79cab8662fd0c41f838f87bae7089a00ea24fa3529a6ceedbb5ad7c. 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/QZPLR2049328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5821026ae317322499d007fabf1e7382defd73e0cfd157ef0fc618f6ae7c3b. 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/QZK6F2094195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba1f7838c83904039b507e8e7cf13f11347512dbd76020f896a9fba0b1ecbb5. 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/QZFYW2196260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525c9af21d58b03c8bf4b4c4c7a74597a7dc08b4babd09b56619eb9b1a4db1e. 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/QZFZ72278103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dccf30c05a1faf85d735f13d5b543a34b64cca9d60e8f89d87c4f753479980e. 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/QZHN82396685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5622d4b8145f3f3b8d5332650915309f2773f881aff6495f6d694b60c352cfd. 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/QZHN82396695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed486b608617557b2af696e83ffccba179598c07d65cc93b9aa30cff22de5451. 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/QZHNC2041899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f2b7b1c0876995dd678a71a6e447b00a5dac4db588900d81a1bd01fcf61a37. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZHNC2041901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8730acfa1e8d63fed4167485f01596e5754e06e369e4ad79c89df363baa766b. 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/QZHNC2041905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c5f8a625fc2f7586b9ac73729c6eab04275cb2f404f193fd37521333225a9. 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/QZDA52327707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f535af14a50c003fe27da293412f9ef0caae8f6e289d918be472f3c5ed02721. 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/QZMEM2205179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525c9af21d58b03c8bf4b4c4c7a74597a7dc08b4babd09b56619eb9b1a4db1e. 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/QZFZ72278103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc650011c6ef5c3032e9885166831363590f12570ab7aba9b225a243bf85eaf9. 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/QZNWR2130768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d58643f9b73e9c10080ad4aa8bf18ff10b9697c043a7c58a2ad82f73e3d082. 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/QZK6K2131139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c737c9ed79cab8662fd0c41f838f87bae7089a00ea24fa3529a6ceedbb5ad7c. 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/QZPLR2049328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9c3d74df59695b75c1ca27379f879ece8dbde087feac809c7b23a52f0b0870. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZHN82072370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042543ddd520ef07884c8dc300182e53d6c45185ed56d6226976b7d433fdfcf3. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USANG2126759.