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 0x4cb9ac62080ef1068b1c39be2d3163da3871aa2daa10e83cba31d75851285842. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9f7a310-6969-4a1a-9a53-a885665eacdd.json and https://artists.proofprofile.net/proofs/artist/c9f7a310-6969-4a1a-9a53-a885665eacdd.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 0x26ae5186f776e7ea2b557fe9e6535aeef57cd61f749d33fc8240d02addb59d92. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:16Z), 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/QZ5AB2337868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeea1fa68ade27ee6d75f281f11e94e627b24dde7a1fc6b3a941319d16a0239. 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/QZ5AB2337856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f4e190c35ec6db2cd66fdfbe82984143a5e19f9c38a1030803f2617f8c384. 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/QZ5AB2337858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ebf99ed9742f1b410846c7bc886c3fe7f58c144943dfcca7a9c745c817c280. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:55:23Z), 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/QZ5AB2337863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bc41285d2278b456292a89a55781e7729bdca0e9b26ff4684fca6038f27f43. 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/QZ5AB2385143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf782fc5285b281a5c5ff962fa168c7f87eb98892acac65eb82b5e2aac41a5669. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ5AB2385151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe931d61578fdadac88e4de7d31c1b3161bbcc74cd57d632ec3872049bb94583b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZ5AB2385152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f59f6d559d73fae5a2b3ea638b97b09274f9564a0ce27aad492520c3e9ff9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:18:27Z), 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/QZ5AB2385156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ad09371de10cd3e6e73be654a9361a3bb35dc0a98e8cb3df1c52453aa80837. 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/QZ5AB2385158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14648e4f016d41e2debcd7ae1396bdf66262586efe9ab82c8b3e053aa11c930. 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/QZ5AB2385161.