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 0xb1d317841653dc1867a513d92b0645a6dc48adfc6e25bd80517f043f972beb85. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8eb9fde-a9a4-4f42-9304-c57105e5bd2e.json and https://artists.proofprofile.net/proofs/artist/a8eb9fde-a9a4-4f42-9304-c57105e5bd2e.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 0xe17e11e96ceb55c219caf77cfb82f2d85b17f2ae1f557edaad6c7719e37587be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGQ2202502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e961d5b3811fa7589f5c40b671de9a7fa63496a642e9d20d940ff8705e7eb65. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL8RL2456413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c161fceb992ffa9e484398e506235c7630bad642b81ed915ce7b2d08265390. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:23Z), 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/NL8RL2456415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e7ad3b442a907b585043bc51805df40191a5555849c29d5ffb476d9c50e6c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL8RL2456416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838c3fe632f50e83cf80afcda6e74fac4181186a840ee0eb510229309c59c86d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NL8RL2456431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85c2c7060856fdfd2e70c6b09a02ab8c87bafb099d0944ea7ef96714dfebdfc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/NL8RL2552934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb9d494bdc7b254826b5c6d54a3a6b1599062c837a48caabc054509a1dd6028. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:10:22Z), 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/NL8RL2558900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eff1baa7b9edc4a20d6f421e38a135b750df69f657f4551c8aaac94c395ebc7. 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/NL8RL2460765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd112c8040bd46d461703fc0c32e65c91fa0249e7b8d2ddee0e802dabb71c5ea3. 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/NL8RL2460766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc3d05d6f000075e496eb6b07f6df4a1d2634ebde1175ef91d3166592bf8bd. 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/NL8RL2460767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabec8ac649c88e60891fe950d38b51ed600194ad6109028ed3aa15a48b60821. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL8RL2460768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b43d30c8a2b96d58cc065749fb3b4932c613891d6d9ca0b9d2355cc790419. 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/NL8RL2460770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e565b5797cc9d7237571a3b19aea9b22e17b54de27a109fe6116fe46d856f. 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/NL8RL2460760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2ed29b97b5c8ec9224b3f79ba45d469f8de7de7e9a797aa18061b16ae3555. 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/NL8RL2460761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a6af34c7f4792c0420e6e73726aa86ce6cfbe4a1be619b52f1eab7694ae344. 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/NL8RL2460762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acb869e0d10e309a7581c295e8cbc0fb3a26ecd89e79faa6916ac94ed3d12d3. 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/NL8RL2460763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed9099bcede81d6e1becbb3ab7f09edd7d3a6c6070e043e8fb8527c24eb9416. 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/NL8RL2460764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609e705dca785d4ee69df29f78a492468c1d26dea4bb1262d86f71e763b04056. 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/NL8RL2460755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0525c448047c9aa3601e16682c10d9fd460f581f56453f786c56bf41bca1cf. 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/NL8RL2460756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea95c9eba976f042e5eee48f4ddd5d255abd70f0e768bd892faf79145b66229b. 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/NL8RL2460757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e463ab76d300ea6f82dfbf9727ae2cbdd38a2afa68ae1a5a7c249e321f82a9. 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/NL8RL2460758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68760756c864306c600ef8072b9f2f726fae40b43d6d08f55ec5f0e31753a86c. 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/NL8RL2460759.