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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4552f1e78663621e179e9ef971ca5b454625dadb6dd1758248db2ed2ae5ba0d4. 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/7f8914bb-146c-4666-a7c0-854fe60bfd81.json and https://artists.proofprofile.net/proofs/artist/7f8914bb-146c-4666-a7c0-854fe60bfd81.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9227e16bbc68a2538cc869e9fe6449256c77800fa710608a2ba0cdec92152796. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:39Z), 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/ROROT1614101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7027413cf3f87e010a7ad257177f7a5a53ffd23576285a80106935662b0722e. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZDA41891715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055e34275eb59fe6d5bce2118ff6df60fc99f8e6885419016c7a2ed51192b2a. 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/QZDA41896306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbb606a28b3155afb49bd7daa2da5a3b95ccb717d95e92770a9eafd941840e5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES91961506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bcccab17b6b404d5b2f02887bf0ac20b4e5ef8158f80f41a5279b87a52ee58. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES52015784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a9c8a844b4c89c49c7d4571ecc4b59d9ae495ea24b1c5dfad9f71fe0c5b9d8. 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/ROUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe24fd62fa62f9141260427ab566ea22c400a2ec0a89583a638addd7c719044. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN52180033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa619f49ffe43fe1e9d1f7f81a6d59974b38f3b657f3f213e1f670862007a948e. 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/QZK6P2280318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07f28c9816ea2f05978eb612a09d18fc2ac8cba441ab6f6993568a33f57db1d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:09:10Z), 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/QZNWR2281461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48c180962d6ec63b20dea4763e4849d0b4514012c86896ef95a711efffded93. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAZ2306652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50f157077390f79e5c70a287b7fed9f36b95ebeeb1c3b5e6e1992b87f85be6b. 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/QZTBD2364870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee779849c40f21708fb62edfcad892d1b7feb1cf2ad2450e608eacc6f0d84844. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:46Z), 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/QZHN62483027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3139d99fc5c05d617cf30c1492e25d11ccfd7980966fd94155d3b22c00ab86e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZMEM2455167.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f5f03ff81de2da72f87d144792486914b18a7865085aa8bf2edd38892b8d85. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAW2415495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bca1fe0bad7279dcb64a41b1a6783f083c3a407d0b07052b89465b008ee57f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ772490658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe0e4f339d0d3dbe47831fab96322cdf7a27d3118c362fa4526757d92121c6f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:55Z), 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/QZES62584546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37ca7c73bf84dc488f50b7c7d8e1a16b403e404e7022da9bbd41ab0fe046de6. 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/QZWFM2573430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffce7d3510c9651a2b6facfbb153795f21c4df99409c30cb86bbbec26d0b814. 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/QZTB62402548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855a4ef8e76e4f99ff72572428f6eeff8246aa04b712a83eb37f275e661dfc7c. 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/FR59R1811785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bad994b4ef1e87939b7c669c6a8548dbf4405ca8f63cc5569500a4c711a6c26. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/RORED1300565.
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