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 0x7a1a4a0a491264a6b5cf0d1be907f24d6d6f99b35366ba3019036bdc09b3470c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b8e571b-b19c-45e9-a215-8649217fad73.json and https://artists.proofprofile.net/proofs/artist/7b8e571b-b19c-45e9-a215-8649217fad73.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 0x48b4717337d4959267fabe35b2b240a078844a73df618bc186b51c6dd96656f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTRX2304260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f2edec47d6312ff2166f17d4733eca88d842cc78f7dafc421a4313c9a348bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM82273359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bb15c0438e784b5aabfce7b2e78832925403a5b2adc4238821f45e3906c5a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2239217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3e81d1c3041434e7c46956d966773b8d3765cebfa293b86a9985e454b0cf8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92235834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08331f08f29b614abda7b9fc77c3b14ab66128df61441445b40815d10be0447a. 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/QZMZ92468656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e98139efc51fa7fea621a4958441cb104498e437f263ff82a31a1c46481ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92473355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7f7964576029f96aeb2169d95d18c47d2869e80faf03e9657686c5142dfcb. 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/QZMZ92473356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08331f08f29b614abda7b9fc77c3b14ab66128df61441445b40815d10be0447a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMZ92468656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefbc13de1053d639b685a51f57324b2682ed0fa8d9c8d1910615e422811a21e. 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/QZMZ92468620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0c1cc938b486f556f1a857d8f725ebd0c3da6f6e7e4ed03ba5eb33e80d0c2e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGJ2180669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918863665195b63e2a1c773bd2619f490539309a90c33a65448c55e73da945a0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GXD7V2414778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ff8c2371e68c7cf9c13e8a59d77a995dd56ff469a27aea7e9fa8d6b853e58a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5752473339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dc115d7c5f1211bb5bfacfedc422de6e368a10b4627dbbf487b398f4b8f5ea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5752473344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db373c3ef0ab0f0bbc0b6be01baf9c152ee6da8d717b6542598487bfbb25385. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/MXUM72300448.