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 0x32aa0be5816f4a7cfd30b6521d69b48a7bacef5c4dc6c22c003e0e241968d6ca. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7cfc4a6-b568-45de-b0a2-1e459349ecda.json and https://artists.proofprofile.net/proofs/artist/f7cfc4a6-b568-45de-b0a2-1e459349ecda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Van Sauers Staat Open Voor Andere Culturen
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 0xf3dd768e065fab794c2617bb5389e687d38cfee33ed6f4ae275b564210737506. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/NLD321301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85abe1a60afc307531514449a8bad68d1a4d8d4d9e6b752741fb84ef37295bf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLD321301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092d85b81e3bfb6d6bf4a6c62553f2e6336038ea78185d793c044ec1488a7d0d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLD321301011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc1d3b50c78bfcd8c54ebb7e000130b59789e05fc77d09d4a36d11289848a94. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/NLD321301012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27ccf3c99cdaaa5e3b3f833a8ba5103e56f745a1d2ca1225180c1625dd39542. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/NLD321301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de4cfd28944a52fab9ec283287e7c1615b93f32e4a07a75cf0357f14f8e454a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLD321301014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771dce641f6bbd9d3979cc1c0a1287731d69beb5b08c23b28bc375b3f6607e98. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NLD321301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3997fb6ffac3d3c02183e8aed7fab8665e297e781ac17bd68ff834d152d3886. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NLD321301016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df17e63112771c2ba4a33a1583280cc3c45ff8332f82b08e2b7e7a43240bee9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLD321301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cfd8781417f5abfa84cbc2bac9fe8ac75a1d713d0de80d91f7e36b521522c3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLD321301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f02affb5a437e373c4a3bbc62f52f4daac64f04382f10af9f7d4b64fb5ecb. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/NLD321301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4ff78e8470c9179985f6ef68f62da79e4a88fc7b2ecc00c8c0da994cafb6a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLD321301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f43f3e5541c822bb804e4238438e48b3d0695764aed1ad5b62b58606a98920d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLD321301021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56e3e48af54fe435942faaf283e2fad6e8ee6f7458e698fc17810382c22f07b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLD321301023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de8d48165d9c55746edb1e73ee3b86a0eddc604e6c81f956f675ad4634b73d2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NLD321301024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50addd566ba61517cefbdc555922977c19099a6b732d8e124ed23656ad44d297. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLD321301025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21140f0ea5fbf39469a9ac82f25959c00d3dfe88956a6038d2a486817c05c73. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLD321301027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481ededf334ce862536d97e61abfb8a163d5012f50f9b5a4d64b9ff13edbb15c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD321301029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311df7af1f6c73a3284aa855e9da42eca6955dd983efc82d955fbb8839b05bab. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NLD321301031.