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 0x4d1345ba7701e0567290b47dafb3a311f5fff93ae7bbf04f943dfe801b5573e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18f2f2b0-5aa4-440d-b02e-06cf25e2bc9d.json and https://artists.proofprofile.net/proofs/artist/18f2f2b0-5aa4-440d-b02e-06cf25e2bc9d.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 0x42b2fdf4e4695e0ee0a09f64c7d14e4b721a4e8ca65c53bc2b6446eecbb2d729. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7edb6227f0b626fb6e7b8f9764bd746f58274b4a0085b0f02f9e0f2c11fcd1a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:48:52Z), 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/DEPI82200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ff06f7b936d0b9b476118abe0ca28a2d871aaa95e34fd3465539a250bf01d. 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/DEPI82200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd433bfca0de7177413db2df7cacc9c31ad46cefb864b6a56a3ac2cd1a1e5d73. 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/DEPI82200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4269f820865bf3e62aa03cf565d7f0ae025d1300b2fbe41a424b3a439c94a73a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEPI82200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ccadbca3744f22d316c4fc1b185ca0c0b21f63d07acb7afbf7a16ea0ac20fd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZN882136460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb28d1fca801295f98feb3638eb6699484b2ac527858bb1c4a6214784b78ba6a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZN882253940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7c2a931e06ebe3690517b4327b8d2128df790dc96e662f410806a4f333e5a7. 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/DEPI82447047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3789c281cda391b354dbf82c8b27da0e79f63fb8f7e36c53b4c50b84bda28098. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZDA62355878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d6e938ba4e82b5c5e301250866f8ba2117fa976751b633334a3029cbafce8a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:47:55Z), 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/DEPI82446919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e473272fb63fbb9f2e740e89aa6a146545717ad07e198774b601c27b2f198ed. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEPI82446927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c63af68edfaa51a11b255c3070bac48ca749a71ba911705218e62e60ba4c0e. 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/QZTBD2456134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023a562a8b63ad8d7ebaa490c0447ab72a07fe3132c6115d78c3de501224b16. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEPI82503411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953e5de2db4f3edb92ddafea3d826fc7e8bd13df506b9f2720dd5cb3ae43b276. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:04Z), 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/DEPI82507969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe660bf1954a694ee58a6c171716c2026b818aedd6ae09e7f9113c9660bd040b5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:24:02Z), 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/DE1QW2514408.