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 0x82c0bad7d143b492bbc79825b3186bc6b87175fc9180f651e32715fd6e7a0dce. 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/c1f33c27-3044-42ec-b8e1-5a878ce79843.json and https://artists.proofprofile.net/proofs/artist/c1f33c27-3044-42ec-b8e1-5a878ce79843.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 0x97dd4347dbb3674f52177dc0acada313d4bd89dd4d45080bc02146394dc81750. 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/FIEMX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a69cc4788cd7abd431fdd22b98182e7fc913776aa57b71aeaca774dcd3d09e. 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/FIEMX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765517a23e1d9034a34c67398b2b8ede29e4ec0d14f8a239d2518d8d3851931c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FIEMX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e90eb849ddf3a84817dcd35443e4754e1ab3a282760998b41713b6f34875c1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIEMX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aeaf8435caf453db64505a2ff71f09a009c02accde5bc367d7a6b07814f648. 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/FIEMX2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56059bdcfd00533b8383f01ef17cbe523e44a0257037dc8d33098a7035a74b0. 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/FIEMX2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56059bdcfd00533b8383f01ef17cbe523e44a0257037dc8d33098a7035a74b0. 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/FIEMX2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd22de04e32ae63a56f6f886384e7a7b50ddc8c2c82cd47133ae27cba6da918. 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/FIEMX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7d2c08ec833bcf206a7054de9681bb25ec5929e2aa89de9e168cb1de10cd7b. 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/FIEMX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0460cb9add8cfb92f53c33ec74dd5c6503d78b89fd7d623efd1ab0abc234f6. 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/FIEMX2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d938c0e64962e0f000ca0f150a6c1168cc7bed2b00b3b7beba332987af766a. 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/FIEMX2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18371f8b7b5b0fc7a9132e6f3facfa4517a3b06e091eba24c141c99976debe77. 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/FIEMX2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc50943fa00dc5a288aae420723500dbeefd996e9232ddc4e2c833513c7aa368. 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/FIEMX2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc0309beafd9891e9a549abb3b9fe90ea5c8119c1822b3e2fb41a4c1c8d6fc. 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/FIEMX2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf13c50d2193c086360952d511eb6791f3c4c9e5d59e5719e2cc455f5800469. 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/FIEMX2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247173cea17366ac66503020d5802221f01ca30fafbfcffca93cc588159d6c03. 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/FIEMX2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0997210501acebcdfba0afea86db1e2f62290ad938576bc4479a84c265ac4b9e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FIEMX2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba4a3a0d71d5615ccab0e11ead77a289597b2793c7b6f9f0afa3074d28a583. 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/FIEMX2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbab9804560ae3dece92d397046220eccd45330b0263f434121a2390784db261. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FIEMX2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba4a3a0d71d5615ccab0e11ead77a289597b2793c7b6f9f0afa3074d28a583. 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/FIEMX2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4068b7d90964b714866be2d98e342d57d6b58c8f57dbf44373b33dea69b8a9b5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FIEMX2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbadc494dbadbb791361bd4f9b4ebbf80e62d5c7b8d91495250bc91513d76b77. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FIEMX2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f25fda7ae4955056a0c5f6507ae236097942c2b0dbefa17f38c9938dc3258. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FIEMX2500018.