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 0x40e8cbdbeacf7455965c43ae926b65a189109f8feaef6be67ff5434973693c66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/513e0262-7bfc-43f0-beff-39cae5f41901.json and https://artists.proofprofile.net/proofs/artist/513e0262-7bfc-43f0-beff-39cae5f41901.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 0x6e1bff4f0f5f97f5bf24e4d31ec93430fbb144871e0dc3a10b3874820fd3cee4. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZMEP2166905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9c8a6494fc2456777c525e301eab991c4d5457f148426e984c9159a45f3ff1. 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/QZFZ62244258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd744a345ac81bd345e18a94633acbaf15ce468e36be2b11094b836d207bed89e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWW2209623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194295b302222165a1ce380378950492eea6f8a4bea35987217bd12f66679275. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTBA2242951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa72200571e3af97e46854fbe08c8b6f7617dcff11f02fc435c5cc7be99ce1b. 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/QZTBA2242952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2a24ce5583232a7e6caa354c0ef0d9c24c5e690db99e5efc3907b46d93a71. 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/QZHNC2306401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35440dc9d0b2679374939e99c5ef1079b6acc16a57f8633907136eef693fe9f6. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTBB2351344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e02df34b451bfea115f6368717bc6594fa29982333292f78bed65dbf1bbb01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFN2304805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3050017cb2becb501a42d1ec861300cd4486046e5328e6cab3326059f1eeaf12. 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/QZRP52423973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a16b4965d35b9d0a35c97a628bc995d08a2aa3b84a2d981a0f4477230f03661. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFX2567337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c7844daac7fd738b32c49fd7b9d6524df560d46075a4a096fc9d12273fca39. 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/QT3EZ2523820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e97bcd5542761eea2ca872fc020e1e367c0f3b5d1c152f44356178e0581f79. 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/QT3EZ2523821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a7c91739ab434fd739f4f28e4d68ad9dc5254c344d8873c416c5d8a6ba5d8a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:53:19Z), 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/QT3EZ2523822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b39f81e42e80d965905bc6b4871bfb79b0fe11ff05ab59bf319cdc626a36cc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:19Z), 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/QT3EZ2523823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda4ae2dc9758a7ece87285c2001cb49759927fec52f22808b701996b0d6703. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F72553334.