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 0xdfcf5b2ae5045a88d02eec690f3654b201c3f93cd5710cf5ef90b4bd105ed84d. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afead677-58be-4cf7-a147-d76d5dc59593.json and https://artists.proofprofile.net/proofs/artist/afead677-58be-4cf7-a147-d76d5dc59593.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 0x5663315fd0f2935974a0608747fa76623165bafa41bac03604c8d54c0c143085. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR2FT0602080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da41c3cc16244c72c805be9babf721ae72ca7667acc8b786a622e806bed43b5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:57:22Z), 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/FRW571217002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5892fd5c67248de22f2a05cc358cbbfda284dd2ba34e05c19af8e34d5448c99. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:51:58Z), 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/FRW571217003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d6fbbfe654aff1c8021021af7569bf977003d193be424e52dbaa00b6bad9dd. 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/CH4231605802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab224967f040a5135927bf8cb5d4b9a4b8aa8a5c76cd9256677ff5010d1b5f76. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CH4231605807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6adef7304ba8c04eeded0280077f4308413a9987847884a13cb46c85c82de6. 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/CHE462500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6adef7304ba8c04eeded0280077f4308413a9987847884a13cb46c85c82de6. 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/CHE462500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88f843c45a02d61d8c573faae554bb3db63d723bb0cdd34e9745346ff2abe46. 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/CHE462500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca4a7a6d5eec510acba202f52711e2b8eab33642cf20882b553766fd703bd4b. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CHE462500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0079cd2422eee8dda8f203d7093c55e2304944cb6493d5f9dbbe00bb63e85647. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CHE462500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd14e5068dd72b7d5354b2cd4a85420f6ff2f445225191d5868e16dfa9a656fb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CHE462500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3cfa309746121a4cd2b0571d982112b91c9c7779cfccf86b44ab5f2cc0f908. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CHE462500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa7ae273232e920d171d57f40866358929f6449b7ea95269f2e008c8efb8774. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:27:45Z), 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/CHE462500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88845ee2c537720c2f7b76d15374f56abbbfe8189f42ef94076456caabe67346. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CHE462500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbf9626ff0f888bf452e32b3b9b93483480e507723bb047ffb26cbc457519a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:43Z), 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/CHE462500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f9af1317c45b3116a27cbd69ec78f32bac294f5bb149cd1ad8cb82738d352. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CHE462500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83dafb59f3be9a60fe150b189885f3a9eca095576f7c028d4acfb461ed14951. 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/CHE462500026.