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 0x12e37a339d7c0ff31d73aacb168847911e5b054389766a0b6ad88129bc2d96a8. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cfe2c4b-67f1-4ff6-9d9d-d29bcd188e99.json and https://artists.proofprofile.net/proofs/artist/1cfe2c4b-67f1-4ff6-9d9d-d29bcd188e99.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 0xee1949b13e40c6fbdc73400cbdb30ee068bfa8254a3548c99341948bdf8c8517. 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/QZVK62200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085488944bc166a886c5a505a53b6e0fdeb3bbc66d17037a5f6d3ca5238b36c7. 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/QZVK62200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0d13daaa19804e1fe424fc62d17a79e572f586123512a7532b8340d891fd0. 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/QZVK62200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685e93e8bf47dde3a6c08f1a4ef46659b37d72192a522b370811b84ede6da97. 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/QZVK62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6b03c135b6346e090e2d1c5eabe1baffaad4ed4df6430d2eb4a89ad882536. 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/QZVK62200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54f0ff97123e967c46962faba18daf6a070176938785c11d0286e22fb2329e2. 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/QZVK62200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c263b3960d4e431e8d8485c614f33f67cdbe9eb84a4795701219e28b28a2be. 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/QZVK62200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ee976a412537db0f43f99d81ee379ad5db7d28a65271e77fb319033579c7e1. 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/QZVK62200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d092c24c6375d0a70c9547b96b6b375336ac67b45caf7e0bb6a35fbb9ea905f. 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/QZVK62200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7c3b853a5394ba2046e7149f48952b1e6c9956383ef1711bce4a7cf4136bbe. 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/QZVK62200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1966fff64a5e7d457b1c7c29b10db97d5ed4e6e85a42885dfdb0fcf9c7994bc5. 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/QZVK62200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87806423df81e3259a3e67d5ddc49e97621273aca6ce5bd2a3cd8c932d4345a9. 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/QZVK62200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6528fe8c9fb5d3ac53a330e9fa203c68a40ab846b25970973795f8a0c04418b. 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/QZVK62200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454c580bf7db4afc932de27c70a7c90f48f684aa0d6bc141ddaa2f9131e1575. 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/QZVK62200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acda49cf8d90fc67d9a0bc2c0ceaaf39574cdc6db085c50359812fd7b6fcf3e. 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/QZVK62200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dfb4a7d7a990b31a47a49a7208e9416a07a24586ccdb58a768e427daf139ef. 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/QZVK62200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800435cd5790378ab0cc687c7a531c0dae77acaec14d21605ebccbbd25f165ef. 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/QZVK62200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498033f862b4f69f113585923153ccf2a42a586d9e601a0a0e8a4f1e8868984. 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/QZVK62200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204971b176a442309ad361dd838b7a19442719b8754fdf6ee63ddaec7919b47a. 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/QZVK62200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cadc5a7521166c9c90f1d3ae20b51042a91ed98959c6cd95a87f052588ddf0a. 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/QZVK62200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ceb4dc6a09c1f11d7ecb1ad230bc976ef76d1b0330443c303f63201cce3517. 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/QZVK62200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf013ad9f03e06ed1cd650f1e8b88324cc42b0bc858eb9019170357fc4585a69. 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/QZVK62300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3ba751b06569e23d7728b0ec28cd9a5ab758d457fe31741c25cb11cd8db323. 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/QZVK62300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf013ad9f03e06ed1cd650f1e8b88324cc42b0bc858eb9019170357fc4585a69. 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/QZVK62300208.