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 0x5d263226f42c880171fa8c92785cd98db2ec55cd523e08f46ffa93ee91bc5b7a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c76fe6dd-cbdb-401e-9e49-1eb6dd1aba45.json and https://artists.proofprofile.net/proofs/artist/c76fe6dd-cbdb-401e-9e49-1eb6dd1aba45.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 0x825618a421b7932ddaa074987b76574833af7e434fc7f71be85e0cda51078a45. 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/QZMEN2200734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd811de95f6a177f4446aa73b2983716cd34534a88ed10ff3db40a4b474dc367b. 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/USAT22101490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9f951c05c2bce176e3e31c4f7ae89858e0441fe3067700bdea7e685733b0dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES62157661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf56f5735c7a4f30d631c903ec4d72a6b645e73316d226f96c6a1db767ffef. 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/QZK6L2022086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b22adccc084399c9e6bfc0e20d7a43b68f3fd9702251feac97e6026b8582259. 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/QZFYX2097403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0414365b954b8a8826f9a1468ce82616c52274f1b163c6e19186432c2aa537e. 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/QZFYX2097404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc361effaf5e5c8043eea5680edaae8730f8feb8eda109d38adf04dd8900c3154. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYX2097405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5ec8f706551c8db89c04ab9920c68292c96da5413e3761c3c86d7a6300d6e. 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/QZFYX2097406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d061deecafd5417fc2d38330e108d0b8820e72079837df69552cb20ef31e1c. 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/QZFYX2097407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b261718fb03ee73e986fcdc2ffe120a90712718a1c60720eb1e2234cee3c8b4. 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/QZFYX1967144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198c82d3e16086b983c1723cd354f54796b01b9aa60c3b94ccdd0b04a3f780c. 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/QZTAU2234360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f76de1685bf8d360795f861f6902bc9900ba4de46a4f9f8262b81dd5f2ed9f3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA52221768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d785b5de98ee526a65a1d7179ab7aae3b5f28742c1723b7b85c289460d5afb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ2112308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4262d720a2a58e4156b4d7b0928d11691cbfcabb8d91af3ba7e5a0c27783cf2. 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/QZDA62046847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d0d02bf5bd577a402e5eb47dbc60915fe2fe2a9d6bb7568d8314ddd20fad64. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN91925866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee07e20c38fcd592d3598dd004f7467c31cece953fd9b9625461ff221379a50a. 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/QZFZ61914194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4a365787627beab9e8dc623d4c56690187b4c2644bd597d779a39e7452a429. 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/QM42K1906089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc7ed384e0bc5958b4cc63f54fc94c89c5d01b2b471e1841f84aafe57acce93. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHNB1913711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b3b741bb23d076048594a0c8e4a67c079b2f5b8bfe50171ff579d396772db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEB1926111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6849a526aa9d63cc3ffd34b6d4d2519b8e34bf47511a8a99d6f366a5226d779b. 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/QZFZ22182182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6fd79b878fa73e5784dcabe602b66d3d7af735f7fe3cb502bc8f016a31def6. 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/TCAEC1967646.