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 0x336be6cd53d2851aefd4fc67204580ec5c98cb0a78b06d44b39c5c0c753b18c5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b02c6f84-bb08-443c-8559-ce2b4626899f.json and https://artists.proofprofile.net/proofs/artist/b02c6f84-bb08-443c-8559-ce2b4626899f.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 0xefe324923b3350ef963c9e374af6396c1458af11c62c77dd86d37875e75e9414. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2182286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd571bfe76f4d38abb6baf7116836242df876515a3d9ead7ac05a212e2211d9b4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZDA52271402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0a8bc7d20e707a7bdadc4b88da4b09ec8f8040f1665b727ad29d460394c67c. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QM4TW2304052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6956027b3bc9bd5ced2626798a1d71e8175866a4e9aa358f521cc6e606a743. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6MZ2398759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b5420dc90fac29f45ef9818fc958e738842f6c45470bd561e4ae8e8c3756d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QMDA62360992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd23183dd0771c62b4c3d9c838fbfc365d8e123049f8adcec3b4e7cfeaa8d2c. 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/QM4TW2407951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8808227a26572aa2ce9179422daa84a413ab74700810ba730667da47fbbadb0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GXCT62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8808227a26572aa2ce9179422daa84a413ab74700810ba730667da47fbbadb0. 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/GXCT62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd23183dd0771c62b4c3d9c838fbfc365d8e123049f8adcec3b4e7cfeaa8d2c. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:21:46Z), 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/QM4TW2407951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6956027b3bc9bd5ced2626798a1d71e8175866a4e9aa358f521cc6e606a743. 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/QM6MZ2398759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ba32553e0e8b1da679921e22b1c1f345c90e943eba25d453bcc80630c32c1. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:02Z), 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/GXCT62400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdef7119ba90bd66973ab4e6cf216cc7e085579072a61105eec9531770680661. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GXCT62400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2ccd7b20abb9bd10933952eab4f1875586630523ac4cce06d108dd5056d270. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:00Z), 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/GXCT62400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ba32553e0e8b1da679921e22b1c1f345c90e943eba25d453bcc80630c32c1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXCT62400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8343da24df88d8906221fe8826b99a2c2fef524725e358377ef38c0b3846edc3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXCT62400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1252a493fea7b361835c82f8564b850dfc3758c9d3e1d7ecfdc05d85758ae78. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/GXCT62400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ca582c72e325c3cebd76c608c51d1fa3f8f1f1de2a723624d36d15e1a0b093. 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/GXCT62400001.