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 0x277b13bea550409fdfb2cd757e4059267560d1b802b232b8ef9ccb3968ddb6e8. 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/66c7b28e-6421-4d28-8411-0dcc67fac104.json and https://artists.proofprofile.net/proofs/artist/66c7b28e-6421-4d28-8411-0dcc67fac104.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 0xfb47692adb79ae27fe4bffa06c54fa9635363e7f9837f18f43753c06890dad9f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAEA1980669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4925500c3d598e7b21c2a6e9ed822cac84dbdf33561ca6def42d946624b988a1. 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/TCAEJ1931868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf453c120b3550542bd7c061c7f87391ced2b5c4cb02488ee009635bcedf946. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:57:07Z), 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/TCAEN1920942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a81f86b62f8023942cac4331b6c623eeaa9c893e6a019712051b6575a4a4b5c. 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/TCAET2058014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233a0259d6dd612f462a02c8aa12d1c7599e15d9ab7d858731ef621d54b69014. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEY2087871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11168b2ece14532b1e5459850eafdce315b3ec746b0c0b66109d37ef025bf17e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:14:04Z), 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/QZK6J2046542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a313d6128e5249d44864a1d758e930c4de042c7e429eca97effe3024e8c60c. 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/QZMEN2132974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a141ebfc49da9f3e3ec2af8c6c494b570bc60215460a114233be1ed99f3d4c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:38Z), 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/QZPLS2152998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b505de4159b70bb9f6901fa4c048861fde630c09d1019e0fea2d1619c4d0f2b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82259751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dbf34f5536397af919a2f552589d403bd188f15a7d489ddbef981c85d3099c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFZ22370860.