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 0xd0f17c48ef3406db66375f847bc07e5ace29e55aa83774fcb4dc5747dd979c0f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/affdbeb6-bfd5-43a8-b36c-a8788af68f9b.json and https://artists.proofprofile.net/proofs/artist/affdbeb6-bfd5-43a8-b36c-a8788af68f9b.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 0xa02739eb2ae736639262f39f7621ba3c560dcc92d9d90fe061f5c12eb9ecd978. 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/BRT0O1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c56c4fb0524c09b2c45c792f53b186bf5645f90c61743de2826228795b6a1. 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/BRT0O1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b706e1949973d6e815421b21d0184c0952bd578c478ca63efd2bdce20e0f1a. 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/BRT0O1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a16d10890f0a77fa8e22e91e9a3fda77037c709f5c773b56aeacafaa071331. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRT0O1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93438a944d566512aa171725dd62c6cc1627b2f295bbdc6f30456500bad97293. 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/BRT0O1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce05b4272574867e2495c441eb2a3c65b2f3c502e7ba4fd552a344d303033a7a. 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/BRT0O1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887898637b22eb05eede2558ef2e0522d8117f69bd091b74d5d99743c44aca6d. 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/BRT0O1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe026c5b1eea3f29e1a9052964781675a4648dfddbdf7e1d92933dbb7346792df. 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/BRT0O1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1a3b3b5180709abdeb72728f93d53cf042abf7e4aa41f94fd9dcb0853a2ab4. 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/BRT0O1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43844071747f9a73a61a9eeed33c2aa1096b66b351fdc94490a79364cc6297f. 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/BRT0O1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7614a89d8e5193a686fa53ce5b03229fd30e0e05b7c2bf5839f32a3cac25e3cd. 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/BRT0O1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e869d990f7ba42b9d976e00700faae3fb72f29f1ab03565ab35431ef4b2a1. 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/BRT0O1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eddd1fa750c995a537f3962544c1f1dcdd680da95ee058bfde04d737d7e316. 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/BRT0O1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf623e9ec17ec9a4e158ca184caa1b820bf78ac2e7579077263bc6b81fe307b04. 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/BRWJ82000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb51c61d105db5f815409b7eed03ed09cf9cfc8bc09368766bfb8420596791. 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/BRT0O1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b00a0110ef31a4212fd44a5e02777c013bae436905d549844b940cc4f39dfd. 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/BRT0O1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a6a8076d93cab0bddc3df79ae697d10cca432d08ef6e20055336d47fdeebd. 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/BRT0O1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee535208d89054180863dd6702a964c9d8aad5ac55b8534976c997bbd3bc712. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BRT0O1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97077dc42152778fa6b7264a6712e2b98a5b286456e38f5934b4bc18e200a5b9. 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/US7VG1616101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97077dc42152778fa6b7264a6712e2b98a5b286456e38f5934b4bc18e200a5b9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG1616101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ef94a30621bee87cea969ec1708e0b0a03cd7c0ff246bf6728d21225ad90ca. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/BXBBD1500001.