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 0xb894e76a27d95c7ec16edb40349e611f36d39b0ea4d25e3edfb98a469e287ecc. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2177fdc0-98af-46ba-b31c-c44bd9c3d29a.json and https://artists.proofprofile.net/proofs/artist/2177fdc0-98af-46ba-b31c-c44bd9c3d29a.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 0xe9f48cbde7172aab2d939ae5c0289af98f7210edfd9aa830a8ec9903bd9c9cfd. 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/QZFZ62254768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ddaf96dee9fb838c71266b6a517e567d8ac24812f8fe292da7c60f8313eb63. 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/USA2P2124556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda43c8dbf1975b87be7902fc42cb820054dc35216a4f1fb79773e6531804a45d. 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/QZHN51949259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258d2be88dcfc5b4b6bd28944ea987fe52c9b6860fb3e3a452d35af39b0ae2a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:48:20Z), 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/QZDA41982862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54836a36149982710268d33563dfe4d2a36031e4ea759bb4e0edc92eabd06cd1. 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/QM6DC1892530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf329990d9995ea846848492c72118b0ffd91bdaf830613df7ee74a2ac9e1b4. 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/QM6DC1889176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f904ad602556e7fe1b1128f806005467c99e5675d9d8b7a43ba4d09775a2b5. 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/QM4DW1841775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a691ebbf3c07fe0d01547fffd5010736487226994c9576dd35356d3d98fdd98. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2147088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ada6ea119af30121508f0f0f86f2243883ffc88662e10b343bf48bd7137857. 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/USA2P2147093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d78a4a39b31810207ed629de579e10ca855e4b334d33812f6f2ebe0c791c1. 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/USA2P2147092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5520df0153f898192f52034ee0b5e298e26db50dc249598293ea763dd7d7cc6b. 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/USA2P2352332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa29bb3afb9cc3cdabafb6c892b2b3578281018d32cab7410095573161eda25c. 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/USA2P2316431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323d25b85279b191937fa5c36314865775e5ecaa8db6a328219bfa5f8ca2db3e. 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/USA2P2352465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03e5acd95346ad077c2e20c85524c5aa42ebde07907eb87601201853157b9d. 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/USA2P2463296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0f4ea81ea737c7982f7187ac7aca0ee079b9a945b6993470543e34e19f4fa. 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/USANG2125206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4110030a8658e2dfaee217e47f1506c50163d1f93159c0238e89df754b3354. 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/USA2P2427776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8120d11da258f91680f8defccfb12f33022b8aca9a4af17af5e38576b1dfc6b8. 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/USA2P2345507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1231a5dbdac6c4dc96104573c8e3a15304884d3666ab567040b92d438f2e69. 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/QZDQH2263494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e09e2e7b45708133d6ba759c0f802dc9ff2974e614157d23c2bfc7e3c4dbb6. 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/USA2P2477010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0f4ea81ea737c7982f7187ac7aca0ee079b9a945b6993470543e34e19f4fa. 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/USANG2125206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c667811ed2e0ee6a0e5747458ec0721ae80f3a2fd3ff40cbe0a8be587c63077. 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/TCAEM1942267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7f1439ffadd0f781b41b614c305560055bcc96de17396f506bc086a9d3efb. 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/QM6DC1891377.