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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451ee35454f9f51911d778b9ed3f8e414b183f4b4f7e871dcc65aabebd435476. 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/4a994fae-2ebd-4c0b-8e58-d0f6d6d98905.json and https://artists.proofprofile.net/proofs/artist/4a994fae-2ebd-4c0b-8e58-d0f6d6d98905.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf334ba4ed588662bbe52c87031a882a5338773a479899bce8c77a332c1e481a2. 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/USCG60811049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaf5b03f8dff58cd32c207f329f0fd16e17c8b0ebf8eb5d6e024199e96b1e3f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:35Z), 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/USCG60811053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1b4f0f9bf413d7d73ca14dcda2629dd1d033f0c5ebc084c5128e5a77910f2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USCG60811057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb481220b1be5cbaf62532e67987b6fdcc76b179278d57c30e0ed16473b3df9d. 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/USCG60811059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba8bd600beb61a9d526ec3c10e1c20a596ce3da7f13096a1ec356e08e6f013. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/USCG61400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22197aa1380ac7e25fbd8d3124021067dbac52ecb57e7adad2c78636ac13b5c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USCG61400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7600f141ce09251945e910750e2a663080062c86daaf6b881da91aeb89ddbf4e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:33Z), 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/USCG61400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d64016c37b55b05c068ecf70a96e7973ca3f6d0e3cc6c6d65eb4435c822d7. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USCG61400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7e059e1a6ee1627d8c6fcb249fbd21b55bcc6db7261702dd3f551ca0d05d63. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USCG61400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02a60377179a91d88858735b588e926def093e01394ec8510decb891171e4a2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:51:56Z), 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/USCG61400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab79be871ef5d9a935abb496dcfade86a367ae4c92da6df146768f8e76dba283. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/US7VG2520945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb0e14a590f04410ebbe524663fe6db043d77c55b4e1044a7cc2836b43c8e3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:28Z), 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/US7VG2520946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3590f1c55a1675ffe37b850058add0819f1ef30d794565b229828de552521. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:56:48Z), 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/US7VG2520949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f23d5fe3940d448ceae6deda41b5c26bd2e2d44ff35b6ec1bbca8b914fbcb97. 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/USCG62200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe957b4910472f86ce602bd3a175fe523d86afac7db482205b413f10da9c2c095. 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/TCABF1282764.
Precioso Jesús (feat. Esperanza De Vida)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33565f97fdedf0b3ac1a1bd59cc9586d3de50d1cfe7b8dc84f73d320a200a09b. 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/TCADA1708330.