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 0x07e6dde48cacc7433889141a70dd73abc83492db4812f26ebf56f55311bb6c46. 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/8b37c936-bcb0-4d79-b040-6a88819d0d24.json and https://artists.proofprofile.net/proofs/artist/8b37c936-bcb0-4d79-b040-6a88819d0d24.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 0x39e1d4b042bc650f537d05fdc44eb202a58e387ccaa7c6eab437025f70371a32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2370387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16120b1410ab90cfe7ec515087df8bd51cbd67755b1bc97f284315bea24381e. 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/QZTPX2391952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2937b45495271b0e39364b9b56575f4305a851e5b39474507a438a305aa697. 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/QZNJZ2247245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da1bbf2a3e56600bc99869a2e0b95832cbc311dd752c74c61667fca7521a24b. 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/QZHN32061450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d2ee9e8d9be890d65bc619517c6b632d323d1a23f0965ade536c52eeee54cf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHN51959113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d9815b10fe1bfd193e19dd63c2db4a12e6c0113df3333cba15a2675fc213a2. 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/QZGLS2291529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6315961900d68f2f8686db41b5b44344e58946a0306ad241271f62a5b9a49c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2221827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61b1f15a51a995e7c6a83c1c66e37bc8b05de934388e1ab96fcaa230d2f73e. 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/QZGLM2285935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44c32a8ebf4e129080f04b6896c2ec6edc7543fbc7b92463c569ea5942cedff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2285872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d8e2fd655b66b09be38886ef904289fa2d4dc8c93fea4749a94fd89067fca. 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/QZGLM2285831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adec870cfb29f9ab7a97bc1277ae846edda0b0f18d29959571b56b7c06df07d. 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/QZHN31911210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540e694ba0c0bf80089d09fb081ee46b5f226d3e595440b9b98431830341c26f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2223499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd55fbcdb45001c7c8a2e0ed779cbeb118504268c4c9635f067885c410f313dc. 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/QZNJZ2164949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952cd1a40961781f5d30c2970a5babffd67f1806228f5b1eba48a695be188691. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJZ2165133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4982c626d283676da1af5a68bdfd7828aae803c9f9bf658463c1331df7a4d3b2. 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/QZNJZ2164927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf092106bff3bff0483fa95c2b4d60d5ce378fda83a29198e030f815f3666b98a. 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/QZNJY2151226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f6fb0bc7e9546e5e2931d23f8d0d487133050bd495ed3b01fb843e996ebe99. 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/QZNJY2151211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7a19bcbd6f0e1c2cd5887bb120b8abc05a9d4944eed0d20f74c019f8dd6215. 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/QZNJY2139002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eee422f51b742689ba1410b0ad2c61a21f6ef604fb376d85b7bf3ee92011fc9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2120370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5550c3c6d6b9e7c48de95515d000232ce2da2a7a52e217161f3f2da589defa94. 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/QZHN71990925.