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 0x7531d2ff596f0641cd01a3334396b3a11dd438d043ba4435a93a8d9b6c45cbb8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bb8bf1c-9a3b-4dc7-b599-cb5251525e58.json and https://artists.proofprofile.net/proofs/artist/5bb8bf1c-9a3b-4dc7-b599-cb5251525e58.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 0x697e8358de6768b829301ff40ee814c016bb97e823088385a46e29d05fa8353c. 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/BRH281500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09dbb7f651f2734fad8391e0c523f3d94e73661d4031b88d602bd18382bc2e8. 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/BRH281500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf9b3413fa1fec2e95d17d76ca90a3b4fdac68e44c7ab9cdafbedd31b0e573. 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/BRH281500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe042ecfb92f041c41021945e0f7a9519cc67da50b859a6c7074e67f18544adae. 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/BRH281500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8ad5cf3cdcc093424d01c0e8d5daa8427d7d12c3d44cdceedae3539118b027. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BRH281500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9af67edf15088f46e5f1952c40d593bdbd67e5bedb021be521a949cabccf19d. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BRH281500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee463f1210dcc1249b7f6066baf78cdb02976a75c65dd2c087ecd9885f4ea7a. 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/BRH281500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc15f44e59e438508e15b6e0a12a447413cf8b815c7d73e3f2084822f23d43c4. 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/BRH281500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaaea37d0b512b967b8f3cfa6afe66ffb642f2c69a7e295df22299bee60015d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:41:33Z), 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/BRH281500013.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb965a26593950447cf943bebcc174e5d893cc2f00b9b7d3530f8a98e94e2d2d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRH281500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757aa4f6f0f412a8a207a4d78966856396a70d81e651fb8a3ed4d6cddb70f478. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRH281500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc6db06537777acab3cbb9dbb143b953c3253889bf60a84977421313d0ab866. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRH281500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f44ab848f44a048d13f691dda082d972128e7ad6a50a474565a331947ba07f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRH281500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02469492affd4c82af789ee3e4507a87a469bc421be0aac7ee4b01b2060b0398. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BRH281500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c2a1e65f2857963456d801624dc8569d14143f233ff06246b278e835f7ae64. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BREHV1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5dc8555b087fd59a144039e384140df0b901241a5f72e83196a9b18cc9f039. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BREHV1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfc466b61f10e9c7c0a8587898f9fea00435a208934fe2167c062c5cc566d0. 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/BREHV1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9bebed1b221622566eb202897ccfbfefbecf464ece344a124f88b522660a9e. 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/BREHV1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca47fa96f8b7181f5e56eebf80d20d10ed512434ff19eeef794b355a0c74e2a. 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/BREHV1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfad783554c9afe4670e7e963df50bcaa2c6ba7e4acd5cd7364da1a67b50559. 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/BREHV1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cd310b274b4333a388f39423e604e2bd8f198830680c22f8cd9953c4b62527. 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/BREHV1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b19514a2fad14c40d47f38ccbc394a7e196bea2ebf0e397fd04b24251c3e6a. 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/BREHV1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12da966b8d552337cd61f7783fe16034568e60497fa97fe9797524801ebad142. 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/BREHV1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a3e75af68bcfdd81bc9b7f8966d7e99e1dc3a98bb8a546e64efa0b1210f792. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BREHV1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e19c1ddb41b54a8aca137c12799344305de774f9bfa3ea61ddf9043171fc985. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BREHV1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310b0047158fb5e1bffce204259e49cd21a4496de4d7497264c6e52dd2027626. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BREHV1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00803791a680131bcdd75a9a7ca3ee329048778bff81b6ca24718126109b771c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BREHV1300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed912e74a5185edefd843f66510f615ea172e9b34caa40eb53315017a42780e. 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/BRH281600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7bfe46c91d4f25da8ee4e8b4136af4fe4b4fd214ee32a7ff2ec35db2520ac3. 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/BRH281600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5c5272eb225e2036deaa48dc4ed6a32039eea7309d2813477037bf7d77f8e. 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/BRH281600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a93a9b27038aead2e4069bd1ed377503ca4418df17e50df0f23f8d2e1134a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRH281600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28b13ae46254e279d53ebeba8cc4d2135dc92ed953b4fe0671207b787f79a3a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRH281600005.