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 0x60067a34ceff151d1196e9ff5bac6b5c4f34e927d3d17d5c94472ebde0c05fb5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTBF2498318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0d834263674b2e4827381d3a5dc2daa230c5da104dc5fef3687c487021bac. 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/QZZ7L2489292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e91790e684e44bac9a78310b2a551109945ff13145ba53129902c0236061c3c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZRP42588264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778620f5843a8a9b6866cb02b84ac395190f6ac8b2ec3b295e1c53984848387. 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/QZRP42588265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe962131f504eb56b538286fb529d2f3020f8fc8494e59c185fa01887c0cf3aeb. 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/QZZ7L2497376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7be6da5f222c3bf9314f382a8fa91d6f0a1ebb67c65977cc141752594e7eb3d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZRP42588266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb113c86229a0487fddfbf64dcd4f8d5b84eaccaa616bf4f643bd6b10525c21f. 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/QZRP42588267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a24e51cc07200039c58bb449bcb3a53aabab6f6cbe24b3fef963e0f4a559333. 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/QZRP42588268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e5de578c3824f52404393e89f5b5f89cdc81dca5520a306eeb0c88bb146a40. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZRP42588269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b8591f8df4f6e02bdee1db7a998c733a9edcfa3b5d2237b8c49b025a035ac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZRP42588270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c099f840458a9baaa826befffc7a23834cd4f838c938139f93a78d9f9bbdc85. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZRP42588271.