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 0x2251f04fef799f8534699eb2e216cb5c2f230954ee1147579fa46b8f70e201d5. 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/ec854e5d-d0b1-4b63-a7bd-3b3186fb8b7c.json and https://artists.proofprofile.net/proofs/artist/ec854e5d-d0b1-4b63-a7bd-3b3186fb8b7c.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 0xd3bb1ed70b0e3afe5f289134f812c2e0d909bd1b547fae97ddd2529f171f513a. 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/GBRKQ2416046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08355429bd9497727a2662cb7c85a8216f287d383b74e3c47103f93df1547788. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:54Z), 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/GBRKQ2416049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3396ddb37698c7f2256ca95271c9052246260c186a55bcec9d9b9cf8483a58. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBRKQ2416055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e42082bfcc8e5a91e0b2da87fa8c328d8f527bef0f0dbbdbf7d6d93adc81f7. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBRKQ2417332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e099e27c3aee8e52b0590df2a07a0e8e10201a04650e4def5fa9cc520d3718e. 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/GBRKQ2417336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9504e33a79388b9aec2817246dcb1891d41768010eedbdb8ae84a0947efaa. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBRKQ2417342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef30552f7fc8a2d12303a0a898502d3a5e81160f9ba140efa70c24f614ae3649. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBRKQ2426255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48f68aaaaffc4f50947eae27c2515763e88a1baa37f7539d91f48228154719d. 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/GBRKQ2426259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5206f2dd945532ab7a94e0e48dbe463033c4f5a1725ebba9e4df0a3a85e33e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:06:52Z), 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/GBRKQ2426261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36b6512cb52b5b4dd59bcaa186e58884cab57078dfb67d792d622494eda5a2d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:55:23Z), 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/GBRKQ2426263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9a7e1f7f0ab0c05f927b0ca00442cf3601c0bc40d4f326323dfc0a05b05fad. 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/GBRKQ2426275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfc21bbd4620f56a2246c85466cfd32bb697b18a22f740552b2d4e7eae446d5. 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/GBRKQ2426280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7af891b4a562cfadfb275e54665be442441e347b27fe4a09829354d48b1c6d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBRKQ2426286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089c6caea4f9f211340b8adb868a84c8fbf222a131714d8251aca3f8e9153146. 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/GBRKQ2426296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc50387c27c35e505c43fa4968a71a37144717eef54b34ddc8f78c1fc0591e09. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:36:37Z), 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/QZTRX2443228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6b052e9ca3c5405ef92347ec269403b5e518aba051aecaad3154d64fbbb46b. 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/QZWV32412844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907bb09b9611a30411abc03421d25e2bbe643978254f22ecffb4a64e9bca5e49. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWV32412840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5169af21149897942957f1aa2bfb0d6983dae6cfbb168effeeba2973e21714d3. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:25:11Z), 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/QZZ8A2412656.