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 0x2fa82bca6d351d845868c446cd89ffe8c2b0dce10ce750f2a5844a53aba865e1. 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/0d944129-2cc3-448b-96c4-1eec2d008354.json and https://artists.proofprofile.net/proofs/artist/0d944129-2cc3-448b-96c4-1eec2d008354.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 0xb25ad834795a8c4aefecf415b84c04c32a49fb5e651ac9be4f177816a766c953. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G1620575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fed11bf714717a67bcb99984685fcf0f6ec007cb568c5d4c0d673e039e245af. 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/ES71G1642596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885d182b33d7d60af4d196d96b0b0b9ab3dba63986c86133a21a13bdba347a8. 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/ES71G1749700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee79118ffe7e91dadb55df2b91a3d521c8f5a31d8d6dbe1f54e2f9bce820f4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES71G1951319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04756e2c20a9c0b35bbb0a7ee1d1a6c39e538e19337f4f2a0a34b8010439ffff. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:13Z), 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/QM7282096892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d22567dd6382e17ea26c8fe1ce871960e4862fa50da2106ef51aa503e8cca. 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/FR26V2032829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d0b9ccd857e46d379fe694f49659ccff2cf8d1978e079e3f2cbda8f4ec50d. 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/QM6P42134989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3a18f2753de543e620d54d54a2994d44183b2d17e326fa61f25d5ccbe82348. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2210451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7193edf79308b144a7ea4de5cc76f386f8ab8373d4e506717dd484c0f78db06. 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/GBLFP2285028.
Cuestión de suerte (Natalia Lacunza Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757e42f01ddb130fe30f627ffdd909fc3bfc457ed169b806d6f4d262e926a618. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92337433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5d97a0b12936049001ea0e5fad4f5d71b612dc2877dd66e98db1bb4c743e00. 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/GBLFP2343462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1d6f4de14138144586d1928fff103a9124b6ddb8eead7ac01b9d462c50263a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152100443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b27371a2466b73557f0e2e59637109d564ac12d5bd8332d58a4f45293cb24a. 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/UKXN22316872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e236bdd0a3c9db6ab00a1bb8331a41d4ae598e68a5fad7064a087ddefaf64c. 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/QM6N22461676.