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 0xd9abe21300fbb26e2cd99407825eae40c52570539eea60bacd7de3d2df4113d9. 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/e4c2668a-3c03-4b04-a067-967c815a53b4.json and https://artists.proofprofile.net/proofs/artist/e4c2668a-3c03-4b04-a067-967c815a53b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kimberly Akimbo (Original Broadway Cast Recording)
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 0x28121ab3b66610f740971c97ea5b848a6c732fbc26661082a6442283f37d8dff. 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/USSK32243204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07842c45140e314262b07335a99fc87f9810c490255aa2fb735909aba1ba07da. 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/USSK32243207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbbaf1d5d6b9987812bee82cc93fecd14d4f76e75edbf309da816c8311257e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSK32243208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a834d3495f7f99621d0a098a4cd21951b364eb4d614a999d3efcc3198db8329. 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/USSK32243211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05df6371294084e053e8301a134aa1d3b01b8351df1455d34041a37707433b08. 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/USSK32243212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6616e04a2f31e522742b0b5c236256183cc49ff1bf45f9e0649f2d61fde73a9. 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/USSK32243215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8c1f034336ce5ec8f8087c081274b732fe9cd460ba00bf649b1cd7eeca89db. 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/USSK32243216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57391a6ceaa2496686047a9042e743f3fbf64629294098ad8d0806f1428c299c. 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/USSK32243217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7171914f435af176dcea30ed9d13193ba3c6f30d0dbeab125d94911ea6060a7. 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/USSK32243219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836a94d420afd3169930bc62134397351332dede6931296a71aec88250013238. 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/USSK32243222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a834d3495f7f99621d0a098a4cd21951b364eb4d614a999d3efcc3198db8329. 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/USSK32243211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbbaf1d5d6b9987812bee82cc93fecd14d4f76e75edbf309da816c8311257e2. 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/USSK32243208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbbaf1d5d6b9987812bee82cc93fecd14d4f76e75edbf309da816c8311257e2. 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/USSK32243208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07842c45140e314262b07335a99fc87f9810c490255aa2fb735909aba1ba07da. 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/USSK32243207.