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 0xa18c48100b8b43cdbb8e7f8ba5a10cfe8c122bfe05ba9c75b0b53dbbec2f8e64. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ebaa5ae-0f52-4ab9-805b-4fc06832018f.json and https://artists.proofprofile.net/proofs/artist/3ebaa5ae-0f52-4ab9-805b-4fc06832018f.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 0x11c0e265a925ed990a5ba343c044201384b5983214d84aa20574edce6aa288ed. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAENV2587076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe889cd71db34aadc7a70270447b49a0008a3c645d895737c83cad3ddd9bf87fd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAENV2587077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe092e1c57a4b1ee3cbb38c686907befe9a90a975505bc9345aea4ab0fa5f48fc. 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/CAENV2587078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22207f7b2b2c4877f52bdcc65d5e7a4d4aada3df1b123ce6f7de271570314054. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAENV2587079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c14459816ab4259f65efe7346910717e1f21862b2c204860e6ce8bf86cd004. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CAENV2587080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d710836ad51effe81944cb79c1d5653b53c040282106a41b967aaf17ec5bdf. 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/CAENV2587081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b12cb26a2174811571c739be481bd6e0ee3dc7e14ceed8b664a168868580cd. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/CAENV2587082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedc8a93be339867d57587b46658e1bed6a05eab535a2a6dc69ab2d7cddf2ef0. 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/CAENV2587083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c03aa99c213f5ca398082e3abacc5ce1e503c2eb02b9eacc0088e5038ce594. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAENV2587084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6a7577ed526ee767296a0762a20847ba020eb7b0c69ab97a75a697efe930e8. 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/CAENV2587085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dbffe2904fc609c80dbe80f78dddc193859367a16ad2e0de782be8f1a1e918. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAENV2587086.