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 0x563a6bc5faffc20db435d9083653ffc2ab95a1b9f7c83a00f928d2a9cd384cfa. 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/670c6529-db33-4116-b33c-a059f83ee0bd.json and https://artists.proofprofile.net/proofs/artist/670c6529-db33-4116-b33c-a059f83ee0bd.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 0x82da54ceb3d069dec84b2cea10ce6336795ff3694178fb30b4413bd3ef0388ed. 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/GBWUL2113200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e5a15c4b9fbf204165caae276bb28d49f303a87f26431d46134b71c4bcccd9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZ5FN2244283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177229614a61a1816608fedb6a8012aba563d4b742a2b64e52ee238e2eb0d886. 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/QZ5FN2265321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc82fd36fa94861d74853ce4f4f2ec6d15c27eca1f01eeb735ebcf030638c8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5FN2283130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb04bbdf85bc41b8aab725f4823a8f7cc4c5ba9a2921540520ff7d19b62583. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLZJ2252356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb04bbdf85bc41b8aab725f4823a8f7cc4c5ba9a2921540520ff7d19b62583. 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/USLZJ2252356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545666d68ee0f39a7844c0c121064abd7a4103367cf67d1dc0f52e528a6d6240. 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/GBWUL2274384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0285d95061477add08a7c1ca48a9cb14cf8399f3a6b5bb122f7726a46fca3b71. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZEB2304352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2101da5380933568759d04bd58c855de04689b0293a5093c088acf10da8b54d0. 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/QZZEB2304353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb1eeee2caee67bbe6d407db83c3d01b7b128f9631807bda2f5048ce6810a8c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:50:10Z), 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/QZZEB2304354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82da54ceb3d069dec84b2cea10ce6336795ff3694178fb30b4413bd3ef0388ed. 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/GBWUL2113200.