thumb|right|300px|The evolution of the hogan as of the 1930s. A hogan ( or ; from Navajo ) is the primary, traditional dwelling of the Navajo people. A hogan has walls and roof of timber, with or wit
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 0xdb50249a3339f20fb5a332fcdbc2094b8cb37df365bfbea7ad9178aded8add53. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20346657-b3d3-461b-af48-31cacd42ffce.json and https://artists.proofprofile.net/proofs/artist/20346657-b3d3-461b-af48-31cacd42ffce.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 0x78fea5ebbc585a02546630489cf33507b8183851cfb082b558cfc5200bd58e09. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:25:57Z), 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/GXF9Q2580625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd1c2100e2392e4e9811022e2461324bcf9d1fab4d12292768f4c986f8c5913. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXF9Q2580626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a48b05c4663e2329650d8bc124e6c1686310d274b6fbbf1353032f1421bb91f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GXF9Q2580627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c32548bbb9285d556773c3bcd5360752c75a7817f47ea90cb4edc497af0b811. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:42:39Z), 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/GXF9Q2580628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a59874ef100f8ef7fe55321726e613cfa34924f680f2e5ac948977ed80a5f1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:50Z), 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/GXF9Q2580629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dc2358889e2a3a152096af8cd55725dfd158d4bf0a2a40a35cef9525a29434. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GXF9Q2580630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f2e5355a1a0ded97c2aadfebd85b2ae54687af9759b1a5a705e68d798c15fe. 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/GXF9Q2580631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2048d2b238cd7cb8a25c973d67cc33635af39e1ebdb3a8be278b1c677e4e52b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GXF9Q2580632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea12f39508a5a04aa22a7b134f2cdd96f87e09f057b55a2d632414da206cbf3. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GXF9Q2580633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2289ce61164947f0aed6bbb97710245dcbeb41ad7462b838b03ed754cafa7d1a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GXF9Q2580634.