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 0x7d7f37f3c31dbfe77b3558dd88e3b1c01533e26af4e60ed2fea42d2b2e8fabf8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/485e7a46-7778-48d4-b9be-d86616b69546.json and https://artists.proofprofile.net/proofs/artist/485e7a46-7778-48d4-b9be-d86616b69546.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 0xb65efb391fd6b91a34ecacd2eef4b2ac9f82b6a07d018208e66b0662fe985043. 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/DKSR61500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5167ef34073b9e456561598f737c62a754ae6ce3db6c8fb8d37812073667e38b. 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/DKSR61500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1c7a29cd2b452c5c57fa964c7c8f58877130ff0161ec71115c8747aed490c6. 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/DKSR61500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e28df261d8fdae095d9f1a6abe70382d6af99dc52615a841583ae90949121c. 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/DKSR61500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b6913b41a60acfea008e1fd3a914ad5466437e0e1c527b9e140c8e13e37a6e. 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/DKSR61500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be4b47ba456a60588749f1f35c3c5b33782e3ca31c79c2f5ca2d85f5aa0a36e. 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/DKSR61500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc63ca7ab0fdf50d6b12daf11c25703fde73dee6f6ac641235c03149b337cb8. 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/DKSR61500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fe200c2538449afe92b9bd1327e38a6bb70c628a9257306230fe41e9d9e27a. 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/DKSR61500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05fdee6a44c862ba8780db8b5944554d079765d38c0d8f3488b3989085544b9. 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/DKSR61500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f93d7ea30c7c5cc6fcc31168c55564b81aeb85062cbdb50ed4d32c4d532ad7c. 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/DKSR61500111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b2bc50d1101c20d708fc96e6185d0c3d92da568287980e890b9ac7fe1b7c2e. 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/DKSR61500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba886e340eadeb224141d1eb9c85e86f05839e1ec7f83216cc6e92b2a7b87829. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:12Z), 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/DKSR61500104.
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 0x112bbc255cea8890fb85461b45684e158b3485ca12aced9b8502a0e948da2cdc. 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/DKSR61100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761f07ec7cf21a305bbed2731aa2e150b1cdf25a6585edb2b1f40444931b0699. 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/DKSR61100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb1cffeaf05432d90ac5b4d0a088041d5e1cc8c75cea8874a9eccd9a92c3c44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:41Z), 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/DKSR61100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1854e8fc00c2227a9d840c602cb9592a6f5dc0270ccf18242a93aab08cceafe1. 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/DKSR61100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff47eab379d417fb9d063ac7f507de18e830b443a2209919c23019d46a81cd49. 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/DKSR61100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ed1bad0e80ed69b62988137c48f9e8da90f2a43644f2ade35fa4a91dbb3427. 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/DKSR61100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee489cd46bc17ebff3feb2f71ef5132c886da6b6fcc9091411c92725f3323a0. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DKSR61100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe411c6cc12e688c2a3d6dac5dbd41a2a1870e51ace1bad65a46f5bffe127ca4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DKSR61100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d00ad5edd47c3230321fa2db65a85a39fb18b315f031ca7bf481f9fdf4f40d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DKSR61100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720141d9b004de95cd31f9b37c811c5209f77a3b6ff01ed3f3d8817790f3848d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKSR61100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c24d7d3f8fc79de415d1b7c5583e47ee2c4141003d286bc635750164b1075b6. 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/DKSR61100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a24f10cbb54120794f00cc51e612d88acbecfc145353b147e00de3ed747349b. 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/DKSR61400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc584d407885f9d57d396cd7d6fac779fd7a2405a4b30b5c57061a0d68470e08. 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/DKSR61400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4df1b37ad98b69df06322603400a00d84984ab4c5b639a0df3b910affa3b53e. 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/DKSR61400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077d817954c79ec0752d39de56e19d035f33b7982f6f8f54517acdae9ba48e0c. 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/DKSR61400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa10bdccc47fcce1f7b694b51b2e6b867a6a6baf77d2ce293e1e32afd70208c. 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/DKSR61400102.