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 0x9b37fc954d1c60e0a23b94c95cd72b7e37645c2f50df34b0dc097c3e3367ae81. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ecebe68-2baf-4d86-a58f-503a9d5681fc.json and https://artists.proofprofile.net/proofs/artist/0ecebe68-2baf-4d86-a58f-503a9d5681fc.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 0x9d4881da476fc5bc3c6c9745dc9354d1a363710709fb0cba28bffbf8ef92c0d8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM21979964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd65478755010092a6d0305095685648dae64e2f6f5c132d12512e06d4accc8. 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/USHM21979965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b729b3e0bb4757b8ff482eb2628da41cf879157c7f704bc9cf4d210ec5eab3. 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/USHM21979966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc248dfc5faa73678b79729e5716454c44625caf07f3b6d218092dbf3e4c4c5b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM21979967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa365ada626f6db51fec2278defd8c4cff2835e67127c2ecc890a179e935b76. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USHM21979968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6711e516f6f6aa01b7ce6c72e0fabea7d7e655863f6db4dbc2e187fe00a2303. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:00Z), 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/USHM21979970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7061dcf83a4f38ec190fd5f3576d7e01086b8ea8bde34c2d03d90f6777908904. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM21979971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795f303fa30c2097ce0dfd66e22d6045092f64cc6569be2f24a9bcb473d1125e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USHM21979972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f2e9adea865d2c023dbd16cb54aa1eac503ce2a35193a86138cb82fe3592d9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:16:02Z), 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/USHM21979973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9780aa1b29a3e08f30877d50508b6f6af1dfd367a0397c861a61191f2c2f74c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:56:20Z), 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/USHM21979974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fd3668c4cf61f3d101007d1fc6007b6ba4b39168b0773be227dbfc4dfee8ef. 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/USHM21979975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc1aa6c8341d95a49223c0af28fc63d827ba7334f404a46423c1fe9818d179. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:31Z), 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/ZAQR42004133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2ab8a42129c87bb1d5a24f6970b58f3f1d6207e0532aa041403f98b09ead25. 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/ZAQR42004134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7898a2999294bf8fb5e664a9dc332a71827dde6a5a701cd9f88b825d2b0ca4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAQR42004136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f4c97385756b8c004c705c169a12fc7893a9bfebce84ac243f1a6b1f18ce0. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/ZAQR42004137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd38f76d93976716cede3fa502cb4d8222a89470ec115258da5fe1e08b472d64. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:08:16Z), 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/ZAQR42004144.