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 0x2138086f0e4d056b1836e26dbb4efb7f0e2e92d41f3b742d20d8dbc9bed52043. 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/b1d0827b-8a12-4bfe-a74b-9dc65bb51b60.json and https://artists.proofprofile.net/proofs/artist/b1d0827b-8a12-4bfe-a74b-9dc65bb51b60.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 0xdb8b4f857ba698669e0c1d9caa6706d113661f289b01cd4bda93f053aa8ba1be. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9M2208358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccda1b0c50768a6b3526f4cd84327b047e5edba5ae1b5da75ea6ee089381c72. 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/QZWFM2305929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfeed9a2501a47f97cc8d4bb84e4a5f0f76e56a24c8bfd8c2a4a2b19ee6608f. 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/QZWFM2305930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db876f23954fab2821c4e8baffeb97f36d139fbef7aede0eade863deda86338. 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/QZWFM2305931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1022581d9432d13b3be96e9b3081e9145d2898b6998adc822a45a0bacde627fd. 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/QZWFM2305932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8485b957ba2a65a131faab4ab580e3752c236c7c16a37fda54f77b62cb54b5b6. 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/QZWFM2305933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d31bcb3dfa1dc86ed0c7a43a23874d6b92dca6616ba9fe39822d50e06e294f. 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/QZWFM2305934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5683c5077902586fd9b2f3e7e3bf09d0b167781d47c5e5bffb6ebb1843a1a3. 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/QZWFM2305935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1427980a033861b92938935bfb1fa4417b237ec08f1535fc0458b997a112c479. 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/QZWFM2305936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae18a1a00112cfa1c0c82f5fa69cc79eca8ca6f0d701a56d4d486a15f36e6896. 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/QZWFM2305937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4763c97f2c08b41ba8be73a258aebf554fe3a4d1c654cddbae6c973536b9982e. 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/QZWFM2305938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674fbec4536b1a192375fef61a31eb1d3236679f3f2042111820a546ded89b5e. 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/QZWFM2305939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286e73988e60392da3d648b63123847a7711efec5ce576008209005f7f460572. 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/QZWFM2305940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa38de557e20dde782c60c8bbd138fc05a7f7177afbb2206f052e70230ca5c2a. 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/QZWFM2305941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3de710c9b0eb0d9c3464f917a53c7dab9b1fbb31d2845690c8e446e09c706a2. 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/QZWFM2305942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ae81c4f0c3906464a9ffaa5759a63a4289372659c245b847efd00b3e0a05c4. 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/QZWFM2305943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88715dc760ee238e2e68742e9bb475bca57acdf6763d2eb399e5421db140f55f. 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/QZWFM2305944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83e737a255bfffdf012612db56d08ccc6d7293e2e4895e88acec859f31fc047. 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/QZWFM2305945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ea91e811d60507a22fe8414d384ebfb3b0a791ac131d6a7dcc6b1c5a713d79. 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/QZWFM2305946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad5f16249177b7996139243eb98c08df99494353fdb79ee2258899b2678705e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGLM2394137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e16ddd3e0c08f12786967ebe7ef2695ead9f31c542266602c04f113d0dd1185. 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/QZNJW2570057.