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 0x75c5c8df9657a847755da7106374734c08e2790d7de81d29b7da343808956f2e. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbdadd53-3f2a-4d84-a4e8-40759856bdd2.json and https://artists.proofprofile.net/proofs/artist/dbdadd53-3f2a-4d84-a4e8-40759856bdd2.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 0xc96f67b8aa8c1f369681d64f1639cdc68000ed63e1adcc2b2d968f8e63be1768. 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/QZK6H2415972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27aadd08565ef330ce7eb651aa62ad03d285001415ec3f1f6ff68f7930d8050. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBF2476917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4443d2f18bb72213be4e69508e9186961c95b3b6b8a9aa3146d0fc91cac72daf. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:42Z), 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/QZTBF2476921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e87d344228821490a7152f4e826291ba22a5ebfeb2f744b6600e91e8785c8. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:29:27Z), 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/QZTBF2476927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22cac2a370ade40e6211a1d1c7e6b6927f6d544de312e7fb9abcc4485ca0779. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZZ7M2448449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ddc4b2036e3b481edbf748250c174b1eb22201348f83397c77cf13376112e9. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:32:43Z), 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/QZDA82505408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ba7b87ded4ab7da48aa8b6b4b554f2beed3575a54383bbae8229ca386c5fb7. 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/QZDA82505409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b621f90cbc6ae91fd54f612d72e7080732a030c9b1ba3dca4b7c90caa84cf. 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/QZDA82505411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e57c97265e4564806edd7e98eebacaac34b6a6bfe648f21d497b814f43a13aa. 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/QZDA82505414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3bc7433edbabd85976c9ba4323cb3cef3b491cbf29f9b2c3c244c6a03760c6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:27Z), 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/QZDA82505415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d21da3e49d836f3947fbb01e757f31cc53b19ed78b8a71d4ee8e1e4e9cb589. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:58:10Z), 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/QZDA82505416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fbd3c92b2d3f3ed1f3321aa1a2aa9abd57d8733aad028314f65a87cc9e9d08. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZDA82505417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b3f189fe912c8b183b400b4545a7c5074e84caf40f0ce18547eb4fd6ba6fbe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLR2551847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e8de8540aa0400a7ec440939f4f2e219dceda3871d20edabaa519c2fec366e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB52526183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb4104343a4643880ca6af28c94aa19f7cd4a9fdb3af4744f45cb19d3e894f2. 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/QZWFQ2541443.