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 0xa56ccfd3b9f08f419fd7bc212a3a386809beae1745045d8b4e8238415809a55a. 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/1406400a-bea6-4c4a-8626-88ff5d41266f.json and https://artists.proofprofile.net/proofs/artist/1406400a-bea6-4c4a-8626-88ff5d41266f.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 0xa7950c8dfd83ca95b2a8a34321075bd940a15b67d8bd0dc84f381a400b70553b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/GX8KD2345330.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7cec52293b09f4cda4f43cae3aad47ee23111d201970a8167eef2bbe60daf. 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/GX89G2319813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc05ab0542199954439d4cab44d84845fe8d9e87332021d1f09eec4c6ec3a28. 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/GX89G2323095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845616a9e84d4ebd9be63c6ef283c3af30f4dbece954e61fe1aa07dc6e7f90bc. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GX89G2349818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f99cb66834aafbbda00c430f95813db2c56cb81b018d5deacce3b440f4c761. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GX89G2371594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3755d22736a6b08da9adbcbd1602c1af628836416d724604045eda7b9aa47cbd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GX89G2375367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504997ee5db7e302663c619975db7c6896d6bde92bb662a956216704c15aa112. 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/GX89G2399128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e892af9d32cde360f1add65a6213e92162e7bafb6ab6636e66befa1fb82ee6f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2333687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bdeaaf638d3bdb60b60d50243bb805819cfac498978d18a72a9da257677247. 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/GX89G2335008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfe4e2491b2e2a2a24efd9b62c55bde55a52057a2d3e7d218c979781cb703bb. 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/GX89G2376464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eb6fdb9a263034b32ff31db71fea35f6b5fa2dea83789e37a5c7efa7667cf9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX89G2332721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95265c3ac1f3dbd40bcce96a77a5aac8584715af838096fb6b9d4c125b211d6c. 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/GX89G2311981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1789fa39d567ba8652a1c849c9cc9b6428740afd1cabb6e43fdfaf0a0d79b62. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX89G2316994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d49f5fb05a228333655767d6a0b729c37b19fce4e0b7d86dce8d9dc382d1aa4. 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/GX89G2307799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fff36b261fe3c19d4704ba103eb8ec3af9beae0d7db53dd417c48f3ff68a19d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GX89G2398078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b328c2c5dbdb5003a7f0196314817f6223d8050a1811e904aa249efab5fa3d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX89G2335759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6d930fa94ed1df661ce0cd3ccee62f59d995c7bcea2f0bbcd6943c42165588. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GX89G2356910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8abccece6547adff2850b5af3ff98e8f42d4d2f08df0c1ff5ffe9013ed791e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX89G2375852.