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 0x0f54b851c42d4ceb62593da2b48a6aa0f7e47ec86bf115dcecdeade96b9f50e4. 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/579d3981-76d8-407b-be48-a70ef9fce9ee.json and https://artists.proofprofile.net/proofs/artist/579d3981-76d8-407b-be48-a70ef9fce9ee.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 0x754013067252c29ef95fed3f0176618f54818de9475f7bc85949c087eb7b50d1. 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/QZGLS2103179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdad080481fe5a33f8bcbcd9c5f31fb7b6fe60dc249952dacd48e3f138c4e92. 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/QZGLS2103184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d449dfc8aa11be820989e0bad8942e768ae6f09d97edfcf8bb962008fae84c. 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/QZNJX2341334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46b1189d6ca36071d8de73f8ed51fe8cbfa795acbdce70489e3cfd884429d88. 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/QZ5AB2251508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc0d340e7aadfff5216ac1e4dbf420171a291922cbddf870aaec481d91948e. 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/QZGLS2103174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7412b1d615005e2158d88703f1b6dca39b538295ac40cf99460088a135535a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZGLS2103175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab29dc0a5f8b10f779c4dd2df2c6e9436441ab81764917bea0bd785e505891f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2103176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdfd08b7aec25afbe965cf7bb8d334df0f8ba7117f95543ddc73bd77cc8235e. 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/QZGLS2103177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c4d122973d14fc8181a16494b169269c588926390bf80ac7fd1492c61e0e8e. 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/QZGLS2103178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754013067252c29ef95fed3f0176618f54818de9475f7bc85949c087eb7b50d1. 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/QZGLS2103179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032759e0da5df15089180c3953e2adb041da007946e2aa0ec6fd729947cfa91d. 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/QZGLS2103180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604f29a84bd970257834ef8b8f2577d911b7dd7a7f0bdf77ec3edb71650d1492. 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/QZGLS2103181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead771e2fc76121578c76cfd88b38ea70ce2e1f93b18e13f9a7e31722cfb736. 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/QZGLS2103182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087afb9a60a5f17ba52632a31d09bbe3cb6d7640b5259abfba874534a683f071. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2103183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdad080481fe5a33f8bcbcd9c5f31fb7b6fe60dc249952dacd48e3f138c4e92. 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/QZGLS2103184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8959eb8fd7ac5956659fa1b8f358bd1b04d3b78122b879cab2a4bd3c8da3ace. 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/QZGLS2103185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bc26125a9294c7b867c8f46650033a0c02e0d0191c0a3dc02b89f9a05bd3fc. 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/QMHUY1750444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab29dc0a5f8b10f779c4dd2df2c6e9436441ab81764917bea0bd785e505891f. 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/QZGLS2103176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc0d340e7aadfff5216ac1e4dbf420171a291922cbddf870aaec481d91948e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS2103174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f238bcc9504c81a087f3fa9241fded25186c4e578481179257ef8c76027d712. 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/QZK6H2316257.