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 0x9567133c96813f3c1df8d120fbf5973deb5f92bc8ae003d5c2692da0a10e818a. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d006a5ea-ede1-4afc-9f65-14777bf4ec39.json and https://artists.proofprofile.net/proofs/artist/d006a5ea-ede1-4afc-9f65-14777bf4ec39.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 0x85e1d37fbd34bdf8ce431567b1c51afde3c435f845495146cb002e490a43ad57. 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/TCAIT2423947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c1f17fd61e5a8d8456e5125d5607f82a99ed83957e768be722e833f9ab70ee. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:23Z), 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/TCAIT2423954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe570810dc32a3717b7890dee9e6305133d2de4aa0c6f435bb4290b09a910f6e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIS2423960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc9a3447446727f91051dcd409e829ae8c085f969552f7c92b13bcbb89d7e76. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:39Z), 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/TCAIS2423965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34005016252abec24b98f9f191d116c992afa2ccf11fc982cac1534cda6463f6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:31:47Z), 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/TCAIS2423968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af44a3b8c05ae81cfa0306b264a1678f7e55881c5923c8e257a09e351b9a765. 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/TCAIT2423972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bf77cacde3d2518a71ce3a192e7135ad0c5dae55d960dabaf33ed5672f1fb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAIS2423979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b99cf741d869ffc25be358c269a1bfb0c412b6288df157dfd8d653c835d9d1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIT2423984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576842320c6077d71e6e58073de1ed0557d520983177ee7f3c31d5d8f806a5b2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAIS2423987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa81cde89dbbc382d9665308490a98ca03b9179376e240eeb29c478e30befde1. 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/TCAIT2423993.