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 0xa349aa76132533d7e100de56148ced56c3080bf70715d66c6b615f9ca1ab2c75. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/757a5c74-db47-4699-83fa-cb58e878524a.json and https://artists.proofprofile.net/proofs/artist/757a5c74-db47-4699-83fa-cb58e878524a.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 0x724032781b1b6b24b1ac4152a3a8f592ae31d96537ad998c42c49d23605909ad. 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/TCAGR2205637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6a0b9381e0adac18a4425bbfbe77e125fec647a8779a3a4ac48e1efc1edf9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2440379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ec8ba050ee1efe1c96f374e652bc31d9dde557348f77e9ca8ee7fefb3eb636. 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/QZKDT2300514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5116cd7e00f24c6c4ef4c454c4e78b8b83dcc7ad57da5ac1b2d61ddbb6335d5. 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/QZKDT2300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccf8f13b3995f968cec702886d675a38cb1aeeb197ff611a4a7887b315685d0. 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/QZTB42220779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eef196e5d57a52ba14165c9eeca87ab9c201af9e678ea4f6bd70bbd6c6fce34. 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/QZKDT2201074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d88c3bebbf9ea37ee6cb3792c8a6fb839640e5478b6dd6210140a9d7d2ec64. 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/QZKDT2200991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb456c150bed08cdc91636fd2b97762ae1a1acb872a537edc281901a7b20ca7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMEP2230078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8de2439c68956ed69348ad171940dd2b93cbbadd520b1aee038bf7d3cb241bd. 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/QZHNB2212216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd566225cad24296d73d17699b5371c907638ba2b7948d09d00dc745758ca53a. 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/QZES52284490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc0e7979bb251358dda40cc596e48c5dcab0f864cfdd5b609a20810852756e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZXYG2402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f829b34a3e77d18508eb4534c826e994ed7dc9f7d69c3b8a5eaba3a63e0ae6. 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/QZZ7X2418002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724032781b1b6b24b1ac4152a3a8f592ae31d96537ad998c42c49d23605909ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGR2205637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4530fe1256e6a4bec0a7c3cefc37a224b62ca42c3d2329965bdf61b6cb6e8eba. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/TCAGR2205655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf37dbc4038db0bee183ae877d5cfb7770d94177ceb08f04bd0b8de85a9a408e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAGR2205663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bc6baaa99d57dd0302145faa76870060b4c72dc37f31045617001f6ed887d5. 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/TCAGR2205682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7883c9e46de671d76a894019d5eead419694f36e22ba0d1512e80e5cd2360e60. 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/QZN882531973.