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 0xe213744e1a152f0afc313dc0be98c2dc2c7a7e53408dd8edd79b1ed462473e2f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b44e6f7-bc4d-411d-97de-b609b7851faa.json and https://artists.proofprofile.net/proofs/artist/5b44e6f7-bc4d-411d-97de-b609b7851faa.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 0xfecbc1aeaa677ce01f104986400b7376db3b5156fc57ccf9268a75265f8917a1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:34Z), 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/QZMEN2343115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bac47890898669de1464abb824e5b4ea22d9855adbb7684a4fccebb7d697f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN92430584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7244a36f774d0b70ff72781cc1d063695cc099b7dcdc24fe94179f0674be09b8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWX2420480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c79fc0ed65f5b300d084f67c1911fcd06dc3c9c4b6b009bc1def5ea48453c. 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/QZDA62580500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dad8aac1524dd30acba97b4e6271fc4993eb9a442efeefb813ab5ef4f9ee205. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA62580514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94908554773494d0ddd283acfe006a020545757d5c223fbbc474532f0e3abf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZDA62578859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410282d06a57b35295e2d45ecc6f41e05bdd490a6bb9cfa235b882928d14db93. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52591494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d6d5831cfd3147154481f36496e846004e296f5ea8950f0e06c40bf597296. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52590109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479443ebd455aa9f360eda90cced6ecae1c091b6d183f6be7140a9d84ed0eeb5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFH2373973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239d1c5f6c8b926e6691829a0831c52177ae5582d2bba83dea15522988ad14c1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZES52591492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84aa68d6a581af0003107c6b68ed9bc5f39cd4eb6a2f56af4a3b66513034a6. 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/QZK6Q2564819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2329db59dc8018902397971096654940e37fbc72651a1e497478fc4ddab90ff3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6Q2563130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc841a4b30cb2753f35172db9b84278cd1c717fca60349f22d598468e90b83c98. 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/QZES82514969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eaa3a222144bc2a47b62137ffe6964e590bf4ba591299e78986fda7ce01b56. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:43:12Z), 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/QZWFQ2521202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194b393672e7fd22fd284f3267428929e7baae6a5ad9b8c79db66b20dbc3d89. 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/QT3FC2521175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8978c830fbe4560b9a313af50ebcd0b3e070befc5c4895b7cace9b83115b04fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3FC2521179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda4a8a82502004d77b3ac1e2c305f176c7c3c6b30595a800923ea0ee79059cb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3FC2521180.