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 0xddfada570d30d2023db7781659e9c3f37e7ff055ae0d76e6cfa8d89e1d6e33a1. 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/3102cdd8-1ccb-4241-be0c-c89af5482e1e.json and https://artists.proofprofile.net/proofs/artist/3102cdd8-1ccb-4241-be0c-c89af5482e1e.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 0x8986cc9e9e6292306886dc9986d9577acf6e27c1e6bf5aa884860a67786f27c4. 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/BEI662000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48524f19bc43e0b046ff5e08d79f66154db23e7e80ac58cce0709e0b46d286. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:49:31Z), 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/BEI662021003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf030ef9ccca504913855ded195948e01e2018bcca2694e46d1d27ad8a9cd15d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BEI662023001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0474e8392809836a10066be703156ae25210aa976c798a09dbd61ba3ac2e6f45. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BEI662023003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebf4c5abda5bd7682d43469d60645f107b416e42de43f16dc11a025e05e8c78. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BEI662024002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870ffe3b03c023d90376c164899186b03606fd57898f89f3182b75276daa6d88. 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/BEI662024003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf67dd5b3922cd12fa7a46f8fb52799a0cfca693ba5eb8e5f04ccde88f7b97. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BEI662024005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814b25674b7e3f5498eaa8318cda7c5cdbc219e45d6aad455cc96c2e51f4331b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:06Z), 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/BEI662025003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ff28c0baf070675bb3335e8fe9f1e2a5ea12853dee84aab12c16d7105e608b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/BEI662025005.
Ton Guerrier Massaï - Black Domino short rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256e46dfd99c9d431aa318d57524f9dbb542a7352ec3bc1db323b0b7d024d724. 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/DGA0P2338278.