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 0x98f3b7480f4c3d75e5e78e0dbc8c7c9d591538a3c102e2a8f027f0975b9e6215. 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/0baedef4-b2b7-496f-b4b3-ec8315bedba6.json and https://artists.proofprofile.net/proofs/artist/0baedef4-b2b7-496f-b4b3-ec8315bedba6.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 0x343c699197fa259a38db2c97c85ab641ec2ad281f6e8d703f9c961a52103c77d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZAY42000835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6864872091ca2708879c04001f945851da675c774d13248a3a39fd96c1769c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZAY42000837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce9275e45bb1de25b5ef5f427f9491476a3ac77a14117bee0280d8f94983deb. 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/QZAY42000842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb050d1627ed917b527b89fd509889ddc4208d6d29a15d8fcd74a5df6f78d25. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QM4TX2259879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03554725a2db47702e1d09b82cb091909e60bcc048669cbb1dc8193ae7d4527a. 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/IDA832200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e909dc2ff8cfa384ad7b39dcbf0459834275d8541ef5fab47780eeeec4537f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA832200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cdf2d011efd5c1f3ff9496e593a968eb538adaa088dbcb8974529e7788cf0c. 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/IDA832200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545bb918146553723e581e6838c9df5a602f61b414f5a6d1ba9143412e247a52. 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/IDA832200179.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a9fc0ddd49db4a4766e08319cf7640eec84cec0f5be791ac332fa0a40f8c1f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IDA832200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7053d7207e1bde3d3e8965db94aba71f3dcd306e9f07c9b9f661cf6461ba39dc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA832200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328e9898a04c66f35080820dc39dd1703f0deb52b3a5fd522d6e0e344527d484. 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/IDA832200285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173c34b11cf1a6674c44cb3f2ab757afbb4b8117bf639695eb416e3a9b74fe69. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IDA832200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4776fd2de7f4989f918c11e961a3daf5155cc898e87de2ae3f916c457b2b8b. 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/IDA832200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb205a3ddbd3682a4929a54eee5306ce63797a90b0e49a567b777213bdde566. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IDA832303263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ae277fe7d46a8ba0160bca5906e434dbaeeaac17a92703ef4f7b89a64c6857. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IDA632422202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce1b39a464742f9e4f993e5fdbf46724bd471e5d978563d647395a62a8cd640. 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/IDA632524440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9648cce7eb13c2cd92f98edb9af6f64f883050032f13c818ba6503629226e5ed. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/IDA632524531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d76bd4a44b45585f80dd5cdeb5544178300f3369dcbc0dfdbe973d7c2df453. 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/IDA632524509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf19ee636ddc1dc11aeb9fdfbb983f915ec3ff89d21333311931f1674a8ce15. 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/IDA632524522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a71e8c285961183c062c9f23b317e67d8987290a393620fb30d2ebcbd4461c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/IDA632524500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd712cf58c167700218c457e36d3239deeaa7fd3c8e205c1c8a69a4e005487688. 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/IDA632526593.