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 0xe0b7180eb53f12d2dcd3a47f1aa0e857d6d79acbc115c8a53bb904dda31fb19d. 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/1f3aadbc-5144-40e5-aee3-925fb7794c0b.json and https://artists.proofprofile.net/proofs/artist/1f3aadbc-5144-40e5-aee3-925fb7794c0b.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 0x2d5174c6955e1c6c9c393e6f0bd637c3be05e1a223b7b7558a5b8083cb933653. 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/FIWMA1200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e7b84e95fa70355e9eb06f0960986e220aa7626f994b616b8486b3cba0239b. 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/FIWMA1300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd49f9833341961d867760ed796988dada2d21a935414a33edcae0398bff43e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FIWMA1400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f6cf881c2bc1161cb80da440e1c079845f46e7fd9e15581c67a8a1eb6ae65. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FIWMA1400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21299846b09964b41240ba51d4613065d5b337074b77af37f63252b78e1e79. 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/FIWMA1600338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645d37a266bf7025ebb552a6ef7c06c8af89964d6a1b6e83082ca5ed54766d6. 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/FIWMA1800195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50816a4387e69f42f6c5d6df44e951e19f540374d83c4afc12ed278970029ad. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:18:44Z), 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/FIWMA1800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeca06ac47305dc33ead229e84e87e3cab99f496e0cd8eaa7c3ebc7421878971. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FIBAR2200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8361a1a48bdff610cb7c5b92c558ba104b35bfec9b6d88e896ac162b5cfd683. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FIBAR2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cea4f37811e4770c48fc9a0554a694943c03eccd4cc2e813c71382da5338ef. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FIBAR2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf566fd93d016b08fbfa1bc6ff4bb1d0cbccd7f847569451a507a1c85c1a56ee1. 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/FIBAR2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139032364e1c55198c6843d53ef840c34329628711bbf901d417ad1bb878fbe. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FIBAR2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa6b4b6344a392f690890ded37e1e179fd3c1e3d38100350f8d6beceadc9442. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FIBAR2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521bcc0d58c06a278e6db3c92e8c8955f56378d1e85edfff4ed9b13ab1abd41f. 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/FIWMA1200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81019af033ae5fe7d8f79f7a623c37f62def48f4442d6a91978eb4954f5d215. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FIUM72100319.