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 0x421b150a91440280d7560b958f4569af84503a95324662a51ca38354b2fe0ca9. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d926e0d-ac12-4a23-9c2a-2591308a1611.json and https://artists.proofprofile.net/proofs/artist/2d926e0d-ac12-4a23-9c2a-2591308a1611.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 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 0xf23baf6a4252deb6aceaf0b8a5afa462dbd44e22b8c2ba3717e31478fae75034. 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/BXSVC2100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aacd5ad4a0cba2fa21e6a386938340a8984b4ea2921af1fccb98773aeeba9ad. 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/BXSVC2100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a863b432e7b599262ac558c930b6159ce7300014652fbff81b6d73b8e9a810c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BXSVC2100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2eebb6ab1b4c58e8a884821cd1d2fac5357fe2cab6564c0c29c032d58d4c00. 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/BXSVC2100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b751588cb4d6fe8de7dd0d17daed7356972e0d827986a5b537f59058a68221. 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/BCMRD2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc3aec2beb6253477b32f660760d3cc59e3efd2759bc9ca9c62b914ccda18ba. 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/BRBBM2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf17657eccc222427e26a63e0c1609b4ece5f2156696e591dfce1d459d134358. 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/BRBBM2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd9d62b4474d2cd70e0c4735035df8b86f3f542723197b0a0b02e1e6d69c0fb. 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/BC35P2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fc3929e16a7ee583b647a417f0ced7f481c4f9c0810b14f4a239487b01dd2d. 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/BC35P2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274c582b2721b6293850de76baccccf24f96d17fe99d2a229c1a25d2da009c20. 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/BC35P2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b9791ab8b319abe6f40f58508055bbe9523397427df127e8f030bf822e9f08. 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/BC35P2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee94da79f25893a6adeafc9aa40f1adeb8f9c35b23e43a98896383883099a9a0. 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/BC35P2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60a4ecafc99382fb24292f16ef288bbf6e300358c52f89738b9a43a6338ab4b. 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/BC35P2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6306b685c3a6beb2ab539f38e46c2cdb54862ed676695944869de20093c17940. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BC35P2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe948cc47edf0ff7c6fdaf7440bc52556ceb25e759629c7bcad2dc3e10bd1872e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BC35P2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e99bb21332034cc44143a3b36c2e7c1fc3dbb16af017dbf88c14d9b4ceecaf. 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/BRTG71800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa2082bd8652f96fdac0b2362c5b635641897a49122e25591cead49dafffda. 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/BRTG71800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddac7bf2d1f2b30e6adc39c5ec474427166a091f363efce7eeef61598e1ce07. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BRTG71800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307bd74cbf21d70ac7b0610c7beb10f2b66885d713c9f2789022685cc857bc80. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BRTG71800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d927bba7ea3f30b3277a9bf57437b8d8a26f4946f3133bd6727a7caf71087e. 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/BRTG71800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b368bd9161e86b41513b4508c567046fbbb9f4a75321d4a6a6ad73aef8b29. 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/BRTG71800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34889764181919b33f1ce2115d9614a13f3412143fdfa8c59105f6e78295c276. 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/BRTG71800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7765bcbfd6febadc5000116840670f13aa2825c69de6be8e424a1e777541461. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BRTG71800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ee8eb0d9acbee8b311ea111800619aa6337eead7e82917a1b67e4e8fa88aef. 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/BRTG72000001.