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 0x4905c084257c9bbc20e77fe4189157659d95f8a922327b4362865649a9e8f1b6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cb6d1c2-5990-425f-be0c-b6184ab8c29e.json and https://artists.proofprofile.net/proofs/artist/3cb6d1c2-5990-425f-be0c-b6184ab8c29e.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 0xb7423591fa13f7c1b94ca9c5a9c48e8b010455241a1fbf7c259e21e8210886bc. 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/USCGJ1132499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b0c43d91dea6d53d64a02cd8b0fcef3a51fc9c9b279b60a5c8a061d77d070a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGJ1132500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda798f9ffb102d0ae1dfdbd7ec016ec025055bfb4195fde12a23ca95a83fd696. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ1132502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40cefaf73aefaaef6fe62dd4396475ee8c3efeca79287f1e3c3d176bccec437. 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/USCGJ1129213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099de0a9c8632d178e6d83a498d9e30caed49a427ab66ab433fe99ac221d7e0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ1129214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221dc188237d61c492d16e5351c0c6e63ca4f2f6df00db0952e9fbc63c4539a9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ1129224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c743fa4643934d9454b961fb34821b54f382704566a511a4fdffd95ee62b529. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ1129225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6bee951a946fd9caf83ed0de295bf5fbc1d47b8693e7bfc237ea7d38589edf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USCGJ1129229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf11e92d6e58047e5768c55f3dd0e394f1f15e5eec1e24b51709d43d58c695ed. 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/USCGJ1129232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab734dec820a8ca858d4fcc49afaf2822ac2ad7855037f76dac659c4aa8db184. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ1129235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53b6ac5946928716d792e8515ea06b563412188d2e74fac7dfdd70a9558b368. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH0792660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9af5b746246b22f2ec0f0f3164351a4c910cce6eddaab6fa64b038365f89c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:03Z), 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/USCGH0792662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaea650d5cdc5340cdf5d63c2420628ed884967fb792aeac7ec0f309acc3536e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGJ0794183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ce978ceec43b62b3a799588032644c04a292a525bf95e1ea99cbd65445358. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGJ0794184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b31a79432e726173e9d12269f8cae208bd92765c26dd9226745d972994aa1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USCGJ0794187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e46944608e20166dae5b46a0a99ba8c2dcda68a78c7a867bc488688dc1d9f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM21347705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8303a7cf744ad3591e70797aa1dc84dbc082b183e5215cef9f23d14bf54ca7ec. 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/USHM21347707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6bc98dc00123431b39720ce1a091885db654700998b2b100048fac716b6041. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM21347710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b13fbacf98cc9b272baddc84f88ef4d947940247d9d2ff900391decbbba688. 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/USHM21347716.