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 0xf92d6df303cfab9b0cf0959153a8ad6fd16722efdfd0c1ca87586c58151e6326. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a452eae-77e1-4a5d-9908-07f8707f2b80.json and https://artists.proofprofile.net/proofs/artist/7a452eae-77e1-4a5d-9908-07f8707f2b80.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 0xa93432415785222a9d99c5f14803acf95289550ca84a6e31794bcb16c7a0b44c. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:50:38Z), 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/CBF2G2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c0c68c0cced6534c0fe8ca8556fa0879c21cb1e90fcdac7493ada0827a78fe. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CBF2G2400004.
Le désert (feat. Catherine Major & Moran)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c0c68c0cced6534c0fe8ca8556fa0879c21cb1e90fcdac7493ada0827a78fe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:46Z), 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/CBF2G2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bfdf3658508f2328a6e17f3ec6c293c96a2df531cb003df3236d70f0be0d45. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CBF2G2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2453ebb3f48c6572f8b54b98d4a17810aef730b7666c18bc84392ece75a416. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CBF2G2400008.
Bunker à ciel ouvert (feat. Catherine Major & Moran)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e916e3bea30806292413cdf6884624316bb1a64a9e479f1e7636ee7c79248f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:23Z), 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/CBF2G2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab489ba8555ae01427c839d70bc5ab619e9f6c72a2eeb3e21066137a0e255eb. 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/CBF2G2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93432415785222a9d99c5f14803acf95289550ca84a6e31794bcb16c7a0b44c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CBF2G2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d261b2590c1b9c883216cc8fb5520065c8f0271296c6503f87da2b0134ed37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CBF2G2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc33281041651f1f1dc37d2ed7fefb91cb99dbc0faa613a829c848ba4adb95fb. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:04Z), 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/CBF2G2400009.