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 0x6d86cef3b18c59753a7109914f4f0a429477eaee5dcdb59a97e19a6d69f06e07. 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/0135e864-39dc-479b-b0c3-9c23e74a6b43.json and https://artists.proofprofile.net/proofs/artist/0135e864-39dc-479b-b0c3-9c23e74a6b43.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 0xb1e34868f6167fb06d15c183274de2a8b3b5e245985333b41cdcda95cf9cdd57. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CLHD21600231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48cfb11a8482d367af9fc4e09073433fad1cac37b3547369943f6fd39b6e604. 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/CLHD21600234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c81dc8ba91a95065f1cb49fecead1970c86b42792712534b17f8f1da775273f. 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/ES71G2009803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffadb2782be6b5e57525a3acd12ede2422a49df0da5b27cb9bb28c2defa47cf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ES71G2019787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7077d8a55be9177a336749f1263d506ea0c2ccd8c5ab7ef1ad86b7a68ccac9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G2033676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e35a18eaa8a6e6b8b99f2404399cfa83ad20b785b3322af422cec4f81009011. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES71G2052840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c7cd4b3902a118c223b93dd94a32069ec4b71fe8ec459765a802eeac91ff42. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES71G2043393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c00df9d7daf68df704bb621581bfaae8603ae5d1ff1ffe86fae3c2741e06f7. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:04:52Z), 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/QMDA72564578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aa453e4117d04bec6ce1794a311522dd5d64b3e7c785828c74690c598c6462. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES0912000019.
Cueca Para Un Pintor (feat. Daniel Bahamondes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3319e263afcd10ff1394cd3cffa72b7a8cb25f02223fa157ef890577abc14e. 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/ES0912000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aa453e4117d04bec6ce1794a311522dd5d64b3e7c785828c74690c598c6462. 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/ES0912000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3319e263afcd10ff1394cd3cffa72b7a8cb25f02223fa157ef890577abc14e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES0912000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c9988088f1b3cec5e22e08280e50b7506ac8a360cdf0f8f09153908b5b1c86. 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/ES71G2223939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce8c0f4df0da456c50343e8a84a2f3165cd89ad084f2e6ddc12942c37a6538c. 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/FR96X1913323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcb5e6544f33f1f24da37fb1a054dd91ad9529e1894bc35b5a1fc8fe7508ea5. 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/CLTE22400004.