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 0x8fedb8e0f0cd074bc6896532faa9e764e30bba3c7ef2ca3f26d467098bb1a46c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/471a793b-d6ef-4769-b6b6-519a1c7ee82d.json and https://artists.proofprofile.net/proofs/artist/471a793b-d6ef-4769-b6b6-519a1c7ee82d.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 0x3fe047d29fd4ef3f60f37acd1337277482e7aaee50c9680655409e2115b465c4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:07Z), 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/QZ9JZ1728145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c6730eede1a5b28d6ddc23d0998d40c9fe6d2f81f79f30c96bfab8aa2ce697. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAGF2292526.
J2 the Iconic Series, Vol. 1 (Acoustic Covers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d6de9dbbd84655be71dc22ea26c9d1c70fe371101e5244fe2bf9c59ce6e815. 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/TCAER2074393.
The Iconic Series, Vol. 7 (Acoustic Stripped Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c40de22de14b248dac5a736ca826082b3921274cb3d436f095a7e8625ba4f. 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/TCADO1882752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138e304d003461f15072eac1b2fb2031e766bbfdff30a6ec79f626b8a1f51dba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCADO1882558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b36adf248642db574bb8eaabd6a2c9ea6366aa964a4045817b2329cae24f3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCADG1737203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d74f0314a9c27932fdf0bdc0376f708ed1449f2b674cb1f2e7b86939beb808. 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/TCADG1737254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8dda0626077a06cd1798697d7f8318b3cd7c2ea9562660f5035ccd662935c2. 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/TCADG1737287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce86fe2db195cef509bf40471c9f566101fd9419a1207a5e24e8554de0454c5. 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/TCACQ1611128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3576644df17cdd5658276a404a8401effd68f41994c911f831eab76f52c2a3d8. 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/TCADO1882563.
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 0x03c14bc491fa7413c20af1d517f646dea76840da2ea66e9ab3670f3842a38ee7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCADO1882577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058fcb6c683e99980e39d1fea6b320f61237e3c41ada71fefaef6daca838a974. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCADG1737204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e15ef767a9a014bd871e324b7000db39652b08bb3d47cce192e1f0ae5c4a4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCADG1737257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56ed7a91831c301f8cefe4c57230e89586979551af46b5bb3ff671bf310b61c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/TCACQ1611129.