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 0xc5978936278ce2693e451a6143838290fd1f2ec39331db819af54a37ed549d0c. 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/f3b8a1d3-d408-4327-939b-df6a409d6f5c.json and https://artists.proofprofile.net/proofs/artist/f3b8a1d3-d408-4327-939b-df6a409d6f5c.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 0xc8f500972449e99c5463e12f80789db0d0d19cb7c1753b82ed10aee9396b2222. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLW2R1709910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaef973591850bed490d80b22495c4b2a3138b753df1fd63e8ff86b9b76a96dd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLW2R1709911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c58a4e76ec52e0632c9bc07f9033809c8ed7d49cff73744c38907cee8995dc6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NLW2R1709912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1130e95915f3d363946f7b09696ee9918ec48f706a60df123031173bc4a50555. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLW2R1709913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1328436129dda584c91fb7e09f64333527bc8cc7aeafd44ee9109f4aab819b91. 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/NLW2R1709915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3c9576cf1a8ec831a79653ecce9f3e68e6afed504202c656ab9084447fb909. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLW2R1709916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021382a6d1c14916be896f52c709bc36f0ca4d1b9068ff683eb1f6f835deea68. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:40Z), 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/NLW2R1709917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437fced2d95066fa286d9807df132a6a70c1b1ef56aed7ec392b1b3f0768a158. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLW2R1709923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8266bb99b68a7668a0efbf85fa2450db913bd3df6bff07813fbf056c3519a3dd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:10:42Z), 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/NLW2R1709926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f0f5f08e76c855eea933864f4996f06d1d6fe380a421437e0cf7f07c89182. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/NLW2R1709931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a2678dfde674b61154e6bee6e6a727cd4ddd9af5a4dd1d287f474a38471320. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLA306300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f0ac2cb8353c3a1ae16e58e810cacfa89cd56a286fd69602fb355674177171. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NLE3R2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ec2d91dc9938f037194c278dfa4916edc3f9ecedd6f8f92f71e8d5f21e64f. 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/NLHR50926037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26681bdc289bfb0cb8ee719f96aefa22f1dfff02aeee1b123b07d6f8f39e2080. 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/NLHR51268455.
20 Hits Ven de Jaren Vijftig - Dutch Hits from the 50's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b1efd210ec7062570a0e060bd22ef6e53574d3023f583590ef7e3159957bde. 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/NLG620457509.