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 0x7c8f77278844b7b561b9091872ced1b1b6327ab98a2d58fc08a50bb996c9239f. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a943f1c4-0295-4b7e-a005-0349214bbf72.json and https://artists.proofprofile.net/proofs/artist/a943f1c4-0295-4b7e-a005-0349214bbf72.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 0x8250ed4a038ef47655c314a70c60f8ea7ab31ea303a8def0fcb488101188d11a. 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/ZAUM72001543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63799a4a8282cd51d53ed71b6a83fabb05e1a5866b3d9a0b24f6d23d2ef7d266. 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/ZAUM72001546.
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 0xadddf8bdfaf481dd7aadd055486bf1d68ef7aaebc5bc3f2e0a59df02f873241c. 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/ZAUM72001545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417fbf79e2630b42f4501dd9d374d276bfabb72ecff85949e31a9e1524e86ab8. 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/ZAC582200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc713c913f56989132d530b8c83ce8f7d6021922a0ce8252710adbac6819b6564. 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/ZA9UV1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0636cb9e0f93cd812ad8ed96a309075aa7f8f8f1b20cf5e77b4a0663ebc3bf24. 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/ZAG852100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6c21ad66777d384bc8b2e50a916593aae600b493de0488ac608f58b627ab5e. 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/ZAG852100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4a4b0494c5d06e6d094670b9cb22a1abb51ed93ea7a16e12bf43ed6099de2a. 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/ZAG852000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f7b597db0af8803106f5c2ec321cf89440c2fa81fda6822c78fb8564c79a62. 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/ZAG852100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7915a497c298df2e448cb242f2356f93d1b4133d558ae7a8502972dc5beebbf. 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/ZAG852100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dac35db2d453480b110e62a1a22b38a305ff10a980eb2dbda9f7c0bccdfac56. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAG852100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb5136a18c470876ee7340cd4a5874ba81675745a9588ffe4a8f1fe80baec48. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAG851300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe081dada3904072dbc94b8a8b2574b99057112b0d2af5719116fd3f35c8c1ef7. 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/ZAG852100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c38db5cbfbaf10293804a42b97ab107379a3b8ea96cb169656054b62f19ffbb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ZAG852100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573e6857da05a3f2790d5e8228ff24ced0d568134836a11daf6e777f89727233. 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/ZAG852100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f171b693154122c66624b79544b5eba86e51f53d28bc238dda03b4b73ff0e7. 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/ZAG852100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee40f3cdc86944320498116c10329717fb7cec936cd6dddf355b5d53630691fc. 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/QM6N22197466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fcda8a58fb76c1be91aac1573d572d3120cd93c1fa99b6211b1f692dd933c3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAG852100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe013c2cdc16b5a43d1d0b98be145ea62cc13ad825ea68b3d711ba7e2072784c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:44:17Z), 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/ZAG852100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e556f086e663684b21dca884a661b21dc233958ffd56ada01958a5d3bd567e. 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/ZAG852100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0417abfa682eb22a6bbd754653932de21e5a1aa99c238cd7c115e783c7c77. 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/ZACN41600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b15aa3ceb92c15563bfc699ce441b5f059206e298a029ccd445b4e0e1e52ab. 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/ZACN41700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8448fd79d62456ea922f4708a711a5ae649fc47c2e488d3d6421cfc1137820. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ZACN41600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ddcae3463365397dd37e7250780c7dcb06998743b4577d93c858ecd3550967. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAUM72002095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fe10de78856aa624b3be138aeee68abba47802fa440e41d5bcfb174873a423. 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/ZACN41600160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681629f75b36c4b5426c0b558712dafc3fcf18c075526622127dde5b7225d8da. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZACN41800538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6cadb76d04e5f240ad6c07cd83a37cc820c6ebbd5b482069f870816a4fd74a. 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/ZAUM71900291.