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 0x1bbbdb5469447274f69311a9e5d2fa608adc0bb9fa8a59c4f550b743ecc1ba94. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5400b3bc-4311-44d9-acc7-c4b4f7ed4e51.json and https://artists.proofprofile.net/proofs/artist/5400b3bc-4311-44d9-acc7-c4b4f7ed4e51.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 0x6642f72dc3f5752e0a16271ee98401da72a80d6ce9305d21dc08ae22aaad3b2d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJ5G1816502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68288c8d620e6c4b110de971ef47685b476e288416eb0802732ff33eddae6260. 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/USJ5G1816503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78ee0834d2dd9f5ad976dba2652ca28c844a135afeb7200005efb5989f0604c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:07Z), 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/USJ5G1816504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e05337aa75df52157958b1930049bb8613260c96e755bd0e9b88926f431e23f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USJ5G1816505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a740cca784664b8f222d46fa72bda01a8a9808a194f9e1b2a362f1ae375b23. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:53:00Z), 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/USJ5G1816506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e1619f44e05a2cf0e88d87e64b2e98260c0f4c500b06e4184254aa402d92e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USJ5G1816507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc862f33afdc8117960e759f9f37d284a7dcaa3348b5179a1362dbc5235350e. 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/UKKP22100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f33c9f862d343c52531c19e35773d052e7f31dfc117b9db369d3d0702d6815. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UKKP22100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6ff57244a08010f171e88a9c5874fce218533251fface0316b4a4900a80fa. 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/UKKP22100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13980c3569f90a87c9f0f196680420f930fd677a2bec35a8f3ada5b6ab310949. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKKP22100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05bd2bd9f33df7f2845ca8b14a53c6bcfa77ec6075a450fcaf58ce74285824. 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/UKKP22100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851d3eecb8d917e9997ead80377aee9479e49dd5bdeb3319e400a00731861f3. 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/UKKP22100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f891ea20e906a14d0fea45fc8a8ae701cd7fc8ddc724cb6bf0bcd3680093ea. 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/UKKP22100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2777ca93ab394baf1bdba71aa3d3305f77093bb867646290b151130095916c82. 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/UKKP22100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2e7eda5999565b9af37f8c4b1a43ec785bd30dbedd3f99edc633b3f05653ba. 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/UKKP22100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6ff57244a08010f171e88a9c5874fce218533251fface0316b4a4900a80fa. 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/UKKP22100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feab0635973358976d33d9cff06d1a3077fbb13eb097ba8e6e58de088f815f1. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:36:25Z), 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/UKKP22100199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef9df2ab6c8263e844c95a1c269f6c9e4010295f1c87d0a93d8897177e018c4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:25:05Z), 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/UKKP22100200.