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 0x8388dc6d85c1ae1fbd6b1845d4946ae0ef8c87afe626b889eff8d42c737ba33a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fedec24-e158-40f7-958a-f55875532c17.json and https://artists.proofprofile.net/proofs/artist/5fedec24-e158-40f7-958a-f55875532c17.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 0x2c66f2a9be11b8d5f66bdec2c25a19470611afa903a09bba58b2aea0be2770bd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUNMG2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae36764ba78e44927cb87e96d4ea348f4d24506f32d8cc5a0e73a26fab552d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUNMG2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71821825d2fcdf27efd15da324edfd0a31f0295d2198e4ef3682c526ed73e84. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUNMG2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092d622c54b7340058f0792d134d9dd7962433057fc989b1e01a099ac98e98e9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AUNMG2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc702f22dfe96bdab8a493a255491b51ffaa71d4d58cc369810ddcd9308aae06. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/AUNMG2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be46a314d98b6eb5882bfde62facbfa81ef0d502dd3ebfe87821ef22a960904. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUNMG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929c2f4e177e4da9aa62326e5c2d0dda1fe8fd9ddb04c4cbafdeb0a063ea3a18. 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/UK9C21900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04876e22976055d1be44a17a7db696a9be58a38b41a710869752c991553d2af. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK9C21900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b0d41e42e661175e325894ab82bfd5dfdaf46043966e11de7e1cc3caf033d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKW3K2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ac2580f02fc37aab0cc8c829925e0eb006f4cb2ca7234121d43c6495d80a1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKW3K2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730f2f67593c320a8fb18ab0874fa14a7cefad12105fbdeaaff466a25a593e3d. 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/UK9C21900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8355d01f8021736b827b73b319d82aef9b7b2a49244dc5b57f7376bc4f231cfe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UK9C21900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771cb92484a51d256e724347bc4ea800353add9cbd48ad09ec1ce9ab930864b3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUNMG1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d14f568541c7eb810a2737cea14c9ab6dc28011b92cf1b55ac4b3d945c640. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/AUNMG1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b547162afa35f6d1e08c33c229a53b682c77f968c99707ce75edf9310927344. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUNMG1600012.