thumb|Ledger artwork by Lakota artist Black Hawk representing a dream of a thunder being. The heyoka (, also spelled "haokah," "heyokha") is a type of sacred clown shaman in the culture of the Sioux
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495d563385ef6bc539f8f7d32fbef65f4e8e3915b6c0d73dc5ce174a8e12585c. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97da8d2d-4e99-4060-8ac4-75140330edbc.json and https://artists.proofprofile.net/proofs/artist/97da8d2d-4e99-4060-8ac4-75140330edbc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7aa2bc1c11a3f9b80dd653109afa0b8ae0a5be57bc6b1d75ec2c3f9fe38d2c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FXQ249600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba260f89037a8bfd759cb7d2c2f99e3fe61a7ab0ab8f3e4d54fbb4c034bf06. 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/FXQ249600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89585eda6e28c995ac6aa0417a8ec970f8f645e0afacaec3df509522cbb07720. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FXQ249600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3868c789504d569540e6c8b46f7a5d88f6d60b9691e1c9d5a61d0b8a1ed2f827. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FXQ249600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a14a2bec691d17a035f69ce62755584613db179556cd194cdde313f68d5de2c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FXQ249600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7aa2bc1c11a3f9b80dd653109afa0b8ae0a5be57bc6b1d75ec2c3f9fe38d2c. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/FXQ249600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ba260f89037a8bfd759cb7d2c2f99e3fe61a7ab0ab8f3e4d54fbb4c034bf06. 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/FXQ249600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89585eda6e28c995ac6aa0417a8ec970f8f645e0afacaec3df509522cbb07720. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FXQ249600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56dbcc4824cb35542a8e31cfcc45cb624916821dffffba39e01987560fd3ccb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FXQ249600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3868c789504d569540e6c8b46f7a5d88f6d60b9691e1c9d5a61d0b8a1ed2f827. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FXQ249600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a14a2bec691d17a035f69ce62755584613db179556cd194cdde313f68d5de2c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FXQ249600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316099c684cc206591ae32ed66c153f152026e577d039cd33001702136bac7c1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FXQ241200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576abdc9477e3526baea6f6f5d4399a000f65c55e691f4be506ba204eee41bff. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FXQ241200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316099c684cc206591ae32ed66c153f152026e577d039cd33001702136bac7c1. 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/FXQ241200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92342107b16ce63caf130e88d2a6bbfd1e83e214c9ca3f40dde54476a90182e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FXQ241200006.