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 0x91b5d052f292534dd95ab6fba82dd0ae253c13efc19974ced3885d7e040ee6fe. 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/6df4085d-253a-49d4-ab50-d208ea53ecbb.json and https://artists.proofprofile.net/proofs/artist/6df4085d-253a-49d4-ab50-d208ea53ecbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
T̨͈͗̌ͥḣ̖̻͛̓ỉ͔͖̜͌s̠҉͍͊ͅ M͉̅ͮ͒ͤỉ͔͖̜͌r̴̨̦͕̝r̴̨̦͕̝o̯̱̊͊͢r̴̨̦͕̝ & V̘̪͆̂̅o̯̱̊͊͢ỉ͔͖̜͌ḑ̴̞͛̒ B̩͎͍̾ͅẹ̿͋̒̕t̲̂̓ͩ̑w̦̺̐̐͟ẹ̿͋̒̕ẹ̿͋̒̕ṇ̤͛̒̍ ư̡͕̭̇s̠҉͍͊ͅ ỉ͔͖̜͌s̠҉͍͊ͅ S̵̙͕̀̃ḣ̖̻͛̓r̴̨̦͕̝o̯̱̊͊͢ư̡͕̭̇ḑ̴̞͛̒ỉ͔͖̜͌ṇ̤͛̒̍ĝ
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 0x3870d3b31bfd13d3550a9a50961caebba10ed290fd3ccf67c756afc4b1b26eb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ22362165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173c4fc6ea08f6cfe77cb15fe8febf29c27523f527489fe715afbed654dde36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72461694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891e521239476eda5185b394b8acf21ba1859bd12a632dddda82c5ea6cafc8e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2337709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883fe7413f224892953c5dcad6e0b5c1e20f6e94453be314bedbef16a4643fce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6K2019433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1aa6dbf06a4835e22efef98a0463ebd3b94b0367633f0ffee23acc72b851a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA2059016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173c4fc6ea08f6cfe77cb15fe8febf29c27523f527489fe715afbed654dde36. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA72461694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da7cc821da62162a29327f6a179dde458ef3eacef3b75b868cf563a1af98c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYZ2484018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891e521239476eda5185b394b8acf21ba1859bd12a632dddda82c5ea6cafc8e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2337709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870d3b31bfd13d3550a9a50961caebba10ed290fd3ccf67c756afc4b1b26eb1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ22362165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff69f1663534c014d2181302a01cfcbc972b5e3c279337ed9a077ea5be24bf11. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42131644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d58e254733af98eda1dcefdcc128719412a50ac068432121be464ce2c1af6b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6H2148722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7fa7e5070887338fc69603cb4bd9b0184ab59a8183c8a3cdf1a2025b5d78b8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEP2052817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe846c640c8871c858426cca18563c87fd9280955f57d33025ab787e906f07e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEP2054028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed21914100799999bd822fae31208dee4620a9ea6cab65a0b0b5f8b3bc9235f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6K2012637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b4fb5ca2ae7af15281a09343a6e9de958481ccd7af576cbd7a294412dbc84a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN42397432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d032c0226905c6a04b33420872f26d53ffcb5f64c80b4a16cc5d748fa0f1ec0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWS2318712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2d126b9e9b0af0f457d28acb2a03d0c31a45f660c8f72908651b1d4de318f3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEQ2244210.