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 0xf8388b7fcb440684aa3524a0a446ca1990fe37d996e0e95f89bf600929796dd1. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11519dcc-dde5-4783-97d6-5dd3d8d343e2.json and https://artists.proofprofile.net/proofs/artist/11519dcc-dde5-4783-97d6-5dd3d8d343e2.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 0x155897e4fc223d66294dc1c628dbd5fc7b14d81ef1d0562d84b43b4223d9b063. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/TCAJO2563293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6684a9f0847bbaf93312b0be641a774595b3869bab3a6ed86eab748af65f802a. 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/TCAJO2563305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4c8bc19c7f17d003ee3336ccd8186099b679ca4c3fc9c3cec402e2b09c952c. 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/TCAJO2563308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621db36544417e5fdabc8bfb85bf56313c2424e6600519d68e5ab513786f0b7. 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/TCAJO2563311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef5f19c5f8953800325dde03c7f4c5575fe1593676202de2fa9eb962e74ea5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/TCAJO2563314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946bda3af0b1813182252c235178a033e651066430bdf1e1bf00f9fc2565055d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJO2563315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8928859f87665e54c7a2a56e090daf7bd7d15dea6435a00ce514021855b1dc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJO2563322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0661ec768ad9d177f9379547e381627184cc3f59b1f93930276a0748196853. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAJO2563325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0302715490da636234f530c2d0d77ee804d7ea49cec27d63dab80b2a1ca21cf3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAJO2563328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79cf45ceb41267583b8d87b70c16d140c48a6e78d38556d94c745447ee1012. 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/TCAJO2563331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f6abcb58810fa6f41f6683d2d9b6d25d04487b21cd9311db53c3857f2a2f4. 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/TCAJP2563337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bdd1ce7c2abf421ad398c79a0a34bf230af03aa21c5b3f35ed4143dc2ec89f. 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/TCAJO2563339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5f2f1549e0dd34161a136c6366c400b9038cc77afbc539278ab145af6decc4. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TCAJO2563343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7b82f0e036eef5a291f213192cd9406b31fd9f745d9d0a4cce172705673d23. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/TCAJP2563351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1066b61736ca24a8cefdf5dcd9f0bf920bd9725ce486882d692dee6356f5b917. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/TCAJO2563355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e59291bc99a951d0577f459d4ad9f8badca6b67862cde819070860218da4436. 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/TCAJO2563358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34ffe880964f9d18c69e42460dabc309cfef9c25c1e392711cee007ec06674. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJO2563364.