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 0xa881c45bf4742a16cc8b242a2e23ce6f84774157dfde7840dec3419ac233bfd1. 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/TWD950728201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef761b8c3f6b8bd87f7f00805fc24ae3ae9ac2231432510fb291596d2d2296c1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TWD950728202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb954fed39f663e98637aca0d695c8d3270bbece717e671b13c5fabebc028a4b6. 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/TWD950728203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed86843b953de1297734ab4e858872357726992fdd8f9515a2c789566dde973. 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/TWD950728204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6e97dff50bb67bd96ebad49cf97125f4ff6ba8c494a668409baa2a94f7a69. 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/TWD950728205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fbf16d986723a776cb868dbe88420ee9875782b2ca760a3def028693c25037. 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/TWD950728206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966fe05963d5907d702b56f5e6a159723a2a1eb036adeef38cb4c4a94a2fb04e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TWD950728207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e62c6ff822b0440ea4cd8885678dcafb21873177d6552e67bd6cbd60b03844. 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/TWD950728208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a79ac7facf7e44c258936590adefcaff981fe1940536f0464bc201d705abb80. 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/TWD950728210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52e4650f668b189e69a71bd7604cc81b16ec418807c03d92e720b9e54be05b7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWD950728211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4519ad85918868fbc8214486d540ae8fff0dc305e2e7ab09e50ee0fe1721da94. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TWD950728213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4299b4ce541bb1ff9e12ca22fdf9ccd9ca9f0600dc9e24359b7b56529f18a321. 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/TWD950728214.