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 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 0xa6098aae7e69931c1d0144e9e7bc93487f1d89bb26ea38ab33bbb47fbd4b4f42. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4b30eaa-2323-4087-9c3f-edbe7a23e45e.json and https://artists.proofprofile.net/proofs/artist/d4b30eaa-2323-4087-9c3f-edbe7a23e45e.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 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 0x1679949d41ab67ab586e2b66f49c072cfed5770a1817db356623820448ffbca7. 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/TCAFF2012762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33411e3b091ab8b1c1c395cd79f763aa1a7f5ebe36a4662e0e7d3f067ab406ec. 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/TCAFF2012775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec10684bf2ce9ad6454fe52848628231991f70c76853bd9b9bde95003f92385. 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/TCAFF2012782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed2c95473270992a0eaa21905b05b5a1b5d9fc4cb121122341d32f8e91132a. 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/TCAEK1911954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e396614c35f467b0ce93085366773a24dfd4c93c991f066d861c183c891f33. 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/TCAEK1911961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4201d8e4e071868ed05e35819c16db39bd753d9fc7d6378a326868781a60e68f. 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/TCAEK1911963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d44ca210df9c7d93000a5e404846e95957852661d36332cb0945c418f720d9. 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/TCAEK1911965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467c8811c9664304ca5cc979cde23495082ed14c25785b61090f8a7d2f84377. 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/TCAEK1911969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b641ed006fd57ab6b60765190d5ec013ceafa0c26bf17b23b721915a91a0be. 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/TCAEK1911974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab4d3f8877ccf424ef3afaca8d34bbeb9e70adcd5a9462a059da9fdaa6c7ee4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEF1903910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc7eb610f1906449107a675c76474d7c13ee04d3f6d4299af484a7852326d2. 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/TCAEF1903914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f9bb1194fa149e5414db4a5ff5d3f63ee1643ef1faa69079427c42a43a43f3. 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/TCAEF1903915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d970aa766ff36183a99d31fc03d3a74332b5b3946d4da22a800da480f587e6. 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/TCAEF1903917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5640fe6cada2a82545a96872a3f00c3993fb6f62adc8c9a7efd2c8179559fb93. 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/TCAEF1903920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5073ebe7f353b0a263b6458eecd91ecbf3ec1a49c781489a4f96e0c9d20ae667. 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/TCAEF1903921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc27ec6e824f5f609e65451e485b15ee53c623b0a36fe5b558177535f5d8f2d8. 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/TCAEF1903923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f52c788f2c635d5d1bb8d57d99780f9745a82c008a8f957cf19a887f9ac45c8. 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/TCAEF1903924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971b249c24a806fef0ab66f973ac50e8493603a0c48539c303b2319d4019f062. 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/DEAR41223854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a9477a32a16c4d1f3e5c669de2fd77eba59aab098c4e92b61f7b0b64400d95. 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/QZES82321667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec2d95f5cf35aa757611c2d1b62252b10111084cb49a0bc2e0810ec77add61b. 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/TCAGG2264348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e5a49536cc0b3962328205e93714882e619f92924f3f4becf5950ec987f433. 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/DEW872203353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2658c2f63da2b55c5dacbeb21d9db7ce602c9527b48f6e34b88c8a8215c09. 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/QZNWU2006086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cefc2a36c08f6c9dfdad6a3d9b3d4f7061309d55d8dc9f52b59c70a9998f846. 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/TCAEL1996708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb10aadc0b95003028b2f90961edd14d78d4cec60c62d7f92095479f5aad802b. 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/TCAEK1909419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347ad7d2a8b1238ba3980c89885b2399dedb08a372cb91c21f372893c7d34abc. 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/AUNV01900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ed48ccf76252274a72022e731c7c4a4f0f1b7c1d2a2174b5f3e3a30d62e4f. 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/AUNV01900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a496120c1ee3794ae96859f2acc6a046cfbd828188ed2b14a7262452d7b1b31. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADZ1807471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49420c0d575cc882f86a63da820fb7618fb11074d9fb9ba7dd5eb7bd3627243. 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/TCADY1898583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f7b618537b068f5328cafd1b2717510b9dd68d803f8e96846ff098b4c9448f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUNV01800341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea240e36f328b210e14e1eda9e25df8d31cdee7074a142eadecbbe21174c2bd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:09Z), 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/DESM81810004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998a9d8ee7c1a1df5e923667a3af1cc73896a98349869908813fad8a874798a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUNV01800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc89b1ae2f6ab66f373b8323ea1b0bae66593c8ee8abe1578ed9a24ee172de7. 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/DEMI31600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0a0aa50cede02db1119253fa176004353c7c045f66de40e7ec1eecd82c5db1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S1424302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0d7690aa4b607a4226b685a87e99685d082c62dd97f1ea6051c1867e8d07a9. 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/FR10S1424303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99a2d4fe82bd62690431f297e818628dd165951b03b38c4d9813488f22b2ff7. 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/FR10S1424304.