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 0xc7416b74fd48be7f85ba2a44a6fbc4c1533a037a94a747a74464618aed259682. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/516a2124-f0fe-4cba-88df-8958c94b7cc9.json and https://artists.proofprofile.net/proofs/artist/516a2124-f0fe-4cba-88df-8958c94b7cc9.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 0x66a54b6ca6b76fa8b4a218efa88d36cf4d638a83fb403933755713d25346f3f0. 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/QZHN32023012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597ca4cb1d07ec64dc066e1c036b57c141a1897ad31b84f412266385072c90fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKW3Z2201689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b82eb0268c50285edf8e0ac46c2df384a4b4282b396de1e48401a690f1cd2e1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/UKW3Z2201690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337893a828189ca2c16111e1fdac867f4b3c78ef0cef18d4356240bddabcf8d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/UKW3Z2201691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9e02f3f3fb9a4572cb632e34b2e50b06110f7d8b239501f4ed3f51955d97c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:18Z), 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/UKW3Z2201692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef650ec10197a7ba028689e5ce85a9b705f3f72f6d43527e83dbddf33aa35c6c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKW3Z2201693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2285020e3a0be7a4e9e91896eb9b3039423603e3fc321de9f7c03ac4d7ed63. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/UKW3Z2201452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a8773f086ac4605656dbc916abf328fa64a2da5bbac00c9cc1d522b109e0f6. 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/UKW3Z2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b832447ab5853d469e30f8684ec49be5facd2ebe840e8be9240ded40f2fb79. 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/UKW3Z2302232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c0cc3f30c5d60fc76f7ba79eaad27f253749cdc4f8a5c9e0b7c16cce9dd89e. 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/UKW3Z2302235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0506a0115206d5b2c6959d38a56fa9362bbddfd3ca19481793745265d4ef181. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/UKW3Z2400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c68f8b3b4722cdea4bfa35e31df6e028251be52b3ef4f471f6601ae0d02823e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:31Z), 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/UKW3Z2501514.