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 0x03ebdecdf6a361e1fccad62caa9b2f88dea1607a989e9a0db07cc136a8ea0b0c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57cca74b-4ac9-47ba-b327-123cd1c963c6.json and https://artists.proofprofile.net/proofs/artist/57cca74b-4ac9-47ba-b327-123cd1c963c6.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 0xb4871df5d4eaa53a362dab68d8e3478d749e376ee167ddc925f93c215257b8a7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:51:13Z), 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/QT3FB2577529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc378ae647d5737c67a496aabbf5355c3986da6734a36fdcbf0528b060a1ad2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:53:17Z), 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/QT3FB2577530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a24640f298e1fcc1a282e25012f096f64790a6390087e632f3db8d71557c07. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3FB2577531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc702c8d184c56ce680c7f6acfce2703e0ddf5d8d6837450f1e5b0228c6d55e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3FB2577532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c2d30a95087f127b4ec96c2edf90ae54a78d2e9f5891b6accc7dfbdc04bad7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QT3FB2577533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1b4ff173221847e97cb649e31ba865becc2af0c7c8d03c415e6c402512dce7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6E62506890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1c63af0c2eea69b58a4690c955d5b38836c59769a61963b74dcb4c8760f930. 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/QT6E62508947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e99a1ccfefa0eedd65150f557ae41633f57ada51dfc17d3e1d6d317fa99833. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2569660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04e8a23e89012b12734403321f1449762c6514ee935e07f9f0eae5b2ad07fd0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FA2569661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8097d2c65fae222746d03ba3ad4f896d356675202a64a1f5d9f3310ce7a5014d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3FH2571014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d73cf13c83b55a1c4d87ab8ad6466f555f354077f5373446cb67bc78f57d24. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3FH2571015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6590965b397536486092c684917e208f109e5b54bcd4e668de4f6eb86f3d7146. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:18Z), 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/QT6E52579907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067a656dfcd5a6c3acf6265dd23639cf0d6b860744f8496bd4c55875f8d686c1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:54Z), 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/QT6E52579908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999876fc0ab6b10ca947468dba74e4bc9b86547e6da6417a2f4d5eb454e74081. 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/QT6E52584981.