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 0xcf55f0c208beb7dc42227740684491c85901ee3dabeab405821ffccff26ebcc2. 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/13791dd2-1065-433f-8321-9acd98d254b7.json and https://artists.proofprofile.net/proofs/artist/13791dd2-1065-433f-8321-9acd98d254b7.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 0x8640f0a0294326e0c235ddde147ea4497006812300f4396130257978b4d7a638. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPN100900941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13816361be55a39df9cceb74743e6514b02d31d2a014b822f16a39ee28ce864f. 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/JPN100901661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30c611c109449c607cb7bf19eb0d3982d22c424f25a634734a442204065dec. 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/JPN100800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284addb449f1ee6a8592e3728bffa6069a177a21503ba760665ed00cc3b677aa. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPN100801061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81302bb31fb055f476f3241dcaacfb2ec08d23efe970dbc46c65130639124154. 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/JPN100900942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29b23ce4b98e8aa953a005d2ebbd5e469d6975d48a0c0895370d99a27596077. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPN100802062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30c611c109449c607cb7bf19eb0d3982d22c424f25a634734a442204065dec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPN100800661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a0dff8f158690301ca949d90424888df5186378a9b24370acecd7dbb77d8e3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPN100801161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9568a88b4f7bf76931ff86c31227fa11a151e9e2f9428e505ddb5339ef1aa2. 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/JPN100802001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2dab83135f2df54e538a74bc6211e00e0c696876b11fb08ddcb8f6f2db8776. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPN101100562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd9d0d891f9bfc5296ea3d4f1cd4ae8ed958805aef6934142b104cddae6a69c. 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/JPKI01310368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519b240aabd6152b419e21e12dd6a697165cce31af4fb223766a86a1f4fe42a8. 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/JPKI01310367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd681b56c3b0bc8e510a878b5b6526407c331ee2257c03769505aa52e91128f2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPKI01310375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31572892abb2700d723eb2abbd95e9ee82eb9948ed5d4e7a0563a047ce57839b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPKI01310377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8dd783bffe9591ee2311a261558928b76b8d2d149a7cb00cee5a85d67404e7b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/JPKI01310383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f74a5febe5a38ed06ae7231fbcf7b53fda339fd9aac9ee1c4c4f7913bc2e03. 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/JPKI01310380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38704b9a2658c73fe75962a04117efe2c12282952cd994be7cb3e77199e5b8db. 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/JPKI01215095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38704b9a2658c73fe75962a04117efe2c12282952cd994be7cb3e77199e5b8db. 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/JPKI01215095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3b8d631245489f26da44d648e517e9cfad372841aeb589da046e26e20ecf9c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/JPKI01314076.