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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551d1b66fbdfd5c24f215eb5f0e695e0591e1c38f2d2bc4a5e381df93ebe0a20. 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/2e03bbc6-c986-47b0-a260-b19f1933030d.json and https://artists.proofprofile.net/proofs/artist/2e03bbc6-c986-47b0-a260-b19f1933030d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb703aa9f84056065846e27395ec3d855f01f2c1f5c347acd41c1bc89bfbef0. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM42K2252846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503a3f2d6021ba01557bf3ff5184cc93dbc9905c8695a65895af48b5a6965456. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UKKVE2304201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbce0c0a22875e18c25632095c5fa9b5fbb4e297201865fd9b5422698afeeeb8. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/UKKVE2304203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0d62ef14231e7862440400f7165ad51183e428f5accd4a135a1aeeec422ff8. 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/UKKVE2304206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e55e5bdfc8d40610fdb9e2cabcbba365066470427f58b3e00570a9081a99a3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/UKKVE2304208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d4f88bb0262558a6dd88c7e210a9dc1177527f4af080732f6230652978ac94. 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/GBWX32408616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612fff0aef6b50fead4555189b02792a5d973860fde584905b54060ab0b22057. 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/QMDA62515684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbef1d0a13066bcd7d17768d250814f2ab2313e39892fc1cd798ab09f540d1d4. 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/GBFPN2262001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0317a253658dedb05c901264e60f39249ed775f0bd42f6805cb9e9fb9a5cf7e9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBFPN2262007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a06138958c940f4a9d8e13d56c3791dff441ea3ad70a5be8ee682662fa4030c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBFPN2262009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259a18b74cdeac15a732ca381ecfed683431c2398cc925d40caea5c40b5f650. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBFPN2365601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70750c38f9e10ae4b9d1936a9e8b838d30827fe1b85b96ebc732cea857dca78b. 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/GBFPN2365608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8f88adfb7f7d5831d3a2aa1330829d0176b20672c25d151c44d33d2f83a9ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBFPN2365610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57051064ce2ca4d94381b8f39838aaecf0b61333c0732b750abaf0c29af66a92. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBFPN2365612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5764137408676ce95467eead99793fce3e9cf2e541271e835434637a3b03fb2f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBFPN2570201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a168e34993376236993f3a237dff3ff0a7a89e3dd5fa0750d0de51796e1191a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBFPN2570206.