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 0x272927e0cac1428dea052c6e438c47bfd34c79ea7c5daef01a4c005eef322f0f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fe1bd16-aebe-4c55-9324-19244c72c69e.json and https://artists.proofprofile.net/proofs/artist/8fe1bd16-aebe-4c55-9324-19244c72c69e.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 0x8b75d7e6028d32ba397ceb7405bc7a5bd955c453cf54b5750ad01e22227fcc70. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:41:54Z), 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/QZ9FB2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f7440e8748a52af3a06c10d171f484f0d0d2ad1c415a11ffd29e229c847e0f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZ9FB2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc1e1c7cd99bd571a5d37ad29725888dede456ca40fce9130748c1bd0a34820. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ9FB2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4c6882aa868d9f079f684fd7f2aab8f40fe1563bd444444b6a04c5a3db3230. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZ9FB2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660ea3876c3fa8666876d8901b4f12daee98c59b6924ac3dac8a6c9edb819e48. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ9FB2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a0bbc92b0c3fdf804c320e5c9a5af1d7a79167562444168fce26ec5b35f65c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ9FB2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b3373ed7500a393d67d167caeea47ee9bfc5c2928592469a47f23a14c4d735. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ9FB2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675216c2f249751c642e9d5e3452dcf90b3a7cd46a806ba03f78408cea54ae80. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:41:41Z), 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/QZ9FB2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec716adf8e2186c0c52946677c9d84d43ce378eb23bb455100787c0c3eca20d. 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/QZ9FB2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c228493a93e8763abaed98d705e3e9000e3d177062fb1cd6a5abc1cefeb884. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZ9FB2400021.