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 0x20c67a43c11e664f066eb47fb60d484f9a89a7bef65aba3973fc94d5e3b8ca7c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78dffe9c-7766-4fd0-b541-25fce1903517.json and https://artists.proofprofile.net/proofs/artist/78dffe9c-7766-4fd0-b541-25fce1903517.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 0xa8ad731b492cb8b486babe1406e179c3d8ab0b187d520d366a7f073b522777a8. 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/UYS051500205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6333d316c671168032a54d00503112e85a8759d57f3219b82685c3b210c3a3c0. 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/UYS051500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3905a8ad8ba674072c2c92b7dd60e583908a0a8b9d995705674927ab26a299. 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/UYS051500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743d7a639c0918d400329115334fa9da95356538f95bd77160de0e6973cf3d25. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UYS051500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f0f289329df5c148d6f2558ea52748f7fe535ff252e600c7dcbc2cc376d391. 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/UYS051500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bcc0491e58bac3825b4e63876cb43b51914ebaece3cb5a847bfa152d12745c. 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/UYS051500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdac9bb3bd046a9261de072019531d6c2477cb1136c0d32fb1478ee5488382a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UYS051500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603611cc9f647ab595d53b11fdb412344d444113516a760007e270ef083fd6d6. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/UYS051500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ce05e333144e134042e3798af29b31525c67ebd5a5b227c69ead469913f449. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/UYS051500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c4db7d3cdd34d9bd78d41f553e49288b3b7cba53bd5873f63491a07709baf. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/UYS051500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6909646eca8110dff34bad7a3b1e78cccb06434957931742c41f4ea8e6a267b. 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/UYS051500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4959dc972de54311f4aff53223116e22eeb822193eb4c37352c9335656d39f. 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/UYS051500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e32a768eca65cc0edbbab996eba4a1e311c021fbab235f7f54badff52b5ed5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/UYS051500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c41307318147e427fb5df384fa87fb3a319dfa574963b4f168cdcca3aa01d8. 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/UYS051500219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67361de7ed3d6275e0b2b991b8c1adff517b06b70715a56c6a7ceaeba2a1fa45. 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/UYS051500212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b94c3a06bea9af3d9bcacec299feb18a3b3164fc27a02e7d057356efd81f35. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UYS051500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd431b92339ec63751f005b99670d9a8c11c9141fbea459ea101fad0467d825. 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/UYS051500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27c061e284c63693c21f3da78bcd190d3634942f23eb1d8a15fe1a1be9819f5. 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/UYS051200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61573d9d7b3c2d1f1058ac838505bba43c72f7ae1e071a7c2ef87c6197bb17f2. 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/UYS051200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ff3bef9355e128afb1a150e66d5e8401acb3d05325a47c8c78c4012c73240f. 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/UYS051200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a10a892ce917c2bf3ed9224d323c1e2418e8c992003e31b4894becc9c86e2. 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/UYS051200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631ddbad702721536969b34a83de30a540e6c1aeaa3b0bd14825590a271d174. 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/UYS051200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df9da79ec571ca14e1d86cfb8d8e336f44182c68f6a8b14e39785b8a068cefc. 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/UYS051200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b95b911f7dc6b942ef77dd9ed2fdb80024c664c4025e9930df89ea643e9da5. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/UYS051200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f1e0f1c4021100a5c098d7e8cabbe76304756e65344a863687f53bca9548ad. 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/UYS051200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd12a343fde8acb6da60a1fd23ddadb671c4ec1ecddfc2a3ecd16cfb3040f7d. 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/UYS051200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61107d172dfe646237a86e1b91ae5d1845985c3801d719b299d1a5176cbab334. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/UYS051200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e38470128fe99cb8ce644460434d99d8087543871e0858589b8d731ed87efe. 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/UYS051200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2dbd6b19e0cca1dba7601db601f7dd1b2f53f579f14684e6be679f4f9f239b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/UYS051200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32421d9aeb8c96e4cacbb655e5fbdabe096a960cd1748cf04d13a704254e47f2. 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/ES7710825601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f91c75aa44026439dbe45618c3b4f6bfae7075996c81aae4cbe313d4eb9a56. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ES7710825602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c65c29b9225c50e9fff318111c99b8fa97199dd4049d5bd456e65545b2b79. 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/ES7710825603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11916ed077d2ca0106fde29f9c5b3c11ce34da48603058456b0440af796820a7. 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/ES7710825604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584320a42c8e3e707cc3daa10e44a0a856b4c7102341f9adc648fd7011abea61. 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/ES7710825605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082a9f8df6b782e4fcbb467db0b1ecd11f327b948028bc71b71dcdcb8790d39. 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/ES7710825606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f7cf6166704adc8d75f5b7bbcee2a4895f00485905277fd4e9dbb8b6e80fad. 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/ES7710825607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989e88761523c8488bde5fa7fa94d0623a673bcb55520ef9edc24d2ae7dfa88e. 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/ES7710825608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e7e275b276841c9c40d705eea39232105f5914b49fc32323a1c9047657e74. 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/ES7710825609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4553f5171845db3675615c9f2c5104974670ee296bee4ec10aae74ccaaa50e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES7710825610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac0d041759194f7a81df259fcde7b1774a5ae7677803f4863a34270622646d. 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/ES7710825611.