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 0x2e1ba0f8e1bb540b8a2b1a2489f60e0a714d60ccd7e1bf71c4800841f6986771. 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/8c2e68b1-bffc-4683-ac19-04957ef3a116.json and https://artists.proofprofile.net/proofs/artist/8c2e68b1-bffc-4683-ac19-04957ef3a116.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 0x54e37bb4ddc5dce102d8a035b99a7ba3167d1f7bfcfc887c71c2628c61f0034c. 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/CH6541722339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68524848ef407da275348612964696adee80508c2a5fafeb8860c0aec85749f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:29Z), 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/CH6541722340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dc1d5cc89ce587a0a169f7dd12ab8279394daa8e150ebad6fcb3cd0fb729b6. 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/CH6541722364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74e1960f9e3ba0d54534d0e944db402fdcc70fb436d9f79e76386148e837821. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH6541722403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c7f22af1eca99f89e3cc346e0a13d99039dbb7bfdd3f12185fb75612567815. 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/CH6541722309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094f783eff13fbd4a9cc6f86452be473bd98eaa57f5d807a025c41483d85f6f8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH6541722320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d88f1520af927dde4d7615a2efead9e8a68cac008f9c7ee72e2aa34a115d6ef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42137436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491439cbcde472ddeede270d9e5606665f9ade5b19d58e18ee24d150fcccf416. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:50:42Z), 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/QM6P42137440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b3bc70572c0d5d778f75281e0433e2458e56490ec2a8ab9bcb43124f457a6b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:46Z), 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/QM6P42137439.