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 0xee6c1c6ae95a7e7affb0e9b0c37a934051ef91aea8f225fb1b1a1e9e233c2375. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91dd67cd-f6db-49c9-9138-00a9e2574430.json and https://artists.proofprofile.net/proofs/artist/91dd67cd-f6db-49c9-9138-00a9e2574430.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 0x1631a2dcb1b2832a449666affa9e8f0ccb5535a4e418ff3f8e7f6e3ad113a14f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K32586503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c5baf9c707cccbe1835f98cb5fb3eb016839b430c0049e275c48808d85c82. 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/QT4K32586504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c68d8a1cef842e91913c92fa6f994e09caa24a9be96cf3b9448432bb60ba4f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT4K32586505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a10ff16db7c0cec5fbbbea7b018a75e56f3b37e1207484e57d02b5b6446803a. 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/QT4K32586506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa87c147e93e0a44367ea41367f2b85b2e16f50b7401d77a1531d2d8d1d128a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT4K32586507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b25efce0b4a2ecb8aeab32e817d3eb3a8d22b92ac170f02e212d7db38102425. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QT4K32586509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7268f29247edcf3f0c1f09eb7994371f74b2ffcebfd7cc4f7b7d0b5830c2387c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QT4K52507557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a12b280b1e9d20d0da50d5b109afd2e36e81bb47b9d355fd77a3b969466715b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT4K52507558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba51ca77eebe7d16fbd736cb64f2c9dff4bdaccca622a831a92d3457089918a0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT4K52507559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d76ef358973a6e657ad2a034eb558d1411967a64847b41f8038280255ca82. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QT4K52507560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6db0b19b9415c823749d7f8156d70102d0a3c7f3dd4611d90950106fd31340d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT4K52507561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdfbd5a18cb7212ccbe45f80222022685968cf8a5bef7422d5a270a24bc5b5d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QT4K52507562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e9b96c64597c2af7dd7c36c6ca2077c7287fb0fce9714abc35f61ffa11a238. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:49:11Z), 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/QT4K52507563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c961ee27ffc951f8d2d3f41f1fda3cdbc843b74d6f0d6e5c6850e9f8ba32ce. 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/QT4K52507564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfd60011aee1f0625e6b027de2679bd43cac692a7a49a2c87befc97491b7f0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT4K52507565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd7c807df8dae59ab37ccff02bcc329383940c88a207341bbff174ceb6c39e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT4K52507566.