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 0x96e2691da0d1209d37ce06307f0deaec6457b75e7dc205f1c0237d34b85cc93e. 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/57e6b09f-d675-4824-884c-84d371646341.json and https://artists.proofprofile.net/proofs/artist/57e6b09f-d675-4824-884c-84d371646341.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 0x39e58f91e783ccc668c1e7155a4c6db4f3afa558b0332aba191cf138b46f04e4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPA651904769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dce9763568db0b72e6d2e440b2ea22e579d3d877c3c25d99cd82ce201a8ab9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/JPX562000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ac249b45d48150eee388d2ff5c2744ed5e3bb1e56469830c49d54aa0b1f1dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPX562100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d741cc54d34097938347dc58cf24a60b505278e0cd4806902a488455b4a849f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPJ222201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1ac7850d77d49d8a1469423b08f4d7e6875ca262839be356540b7f4afb777d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPJ222202252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2d51664ac94d9ca7a72210dbce12e880e27190e8224fb0ef9ac75f56a989dc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPJ222202246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea406d606ff61745daffa7a0aa97f9087a56157c9e27d3c63437d05474efdc. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPJ222202233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d741cc54d34097938347dc58cf24a60b505278e0cd4806902a488455b4a849f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPJ222201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad571435966f076c5bd375fdb132124a60bea06373c7e253f5d41abdefcc3da4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPJ222202247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4a3fa99682f9067cebe60f86974c0861fdfe566b1e0db216638fea972c2fc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPJ222202248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df9fb4bf014b397d9a3a7a078f079265b74586b79ddcd3e611a8084e2d38df3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPJ222202249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1ac7850d77d49d8a1469423b08f4d7e6875ca262839be356540b7f4afb777d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/JPJ222202252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea406d606ff61745daffa7a0aa97f9087a56157c9e27d3c63437d05474efdc. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPJ222202233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d741cc54d34097938347dc58cf24a60b505278e0cd4806902a488455b4a849f. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/JPJ222201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df9fb4bf014b397d9a3a7a078f079265b74586b79ddcd3e611a8084e2d38df3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPJ222202249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6287965cf70458b9dd6b0f22fa693e1d0b42d03de9e4bfd6e799c2031cb4c6a. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPJ222202251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1ac7850d77d49d8a1469423b08f4d7e6875ca262839be356540b7f4afb777d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPJ222202252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1f81e7c07b90a1ce41795b8883711273c716fa597b3b3cf08396283461fac9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPJ222202254.