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 0xae82a088a2fd0b5eec4625cfc0c3cceb43d112ff2fd0d139d4f59672e61eaf55. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6c7325a-cf3b-4ca4-9a93-80067eb2a58e.json and https://artists.proofprofile.net/proofs/artist/e6c7325a-cf3b-4ca4-9a93-80067eb2a58e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rhythm & Bluegrass (Hank Wilson, Vol. 4)
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 0x0df939dea2deff8d6c93ecc074a625a1df31e3223bae22be7db73b42efd559d2. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T16:51:10Z), 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/USJCW0700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0530729332bdeeb068b667257032bbe26d812cf628ec58f7f7ca4f2eec657. 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/USJCW0700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe2c5b93a2147eea3e9584ada9ebe10e3911597b42114c1859c25baa913e419. 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/USJCW0700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42768ccd64b53a61f22c0b3f04195bbece4e5defb6f33b7c62f057a2d5041843. 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/USJCW0700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6563b49dc08a27004d3e3b9b984c84d21388f66a0e75866e70cefa427438f935. 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/USJCW0700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3468bd5ecc6f2eec3ff5ab6f48eba15b3b2378809594fd652ead274adc1a6bb4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USJCW0700071.
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 0x7f9c8aefe5cd7ff6ddadf7258ebb61107dcb8152aa79f44e823f72b81a85b81b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USJCW0700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85d81b0b7fe4ffbd06da2527c3e3d4eb0c1026ad9f06e7f5df5c0ea6b3b38a0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USJCW0700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0ab7850b6b392e27792064359a8401383e3f94a6722e6ce21f6e33c08a860. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USJCW0700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e1a769992618f6d4497484637332f3d821e4ceeea3ffac74ce4847332e8390. 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/USJCW0700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dc1f3bda859ff554b55135b02082f765c2ab5cf04de8a18b8ecfeb9a1625e3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USJCW0700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbe37f57a015b58f57140ec535715fcb6110b75946f7c91d113ff4631465f2e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USJCW0700082.