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 0x5c9e357671ad4d328ec4b54411f8f42ba64ccc8fe13c38ebe2aab6bb2999990b. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4970b45-ae24-4d41-a937-656e1ce7a1ed.json and https://artists.proofprofile.net/proofs/artist/b4970b45-ae24-4d41-a937-656e1ce7a1ed.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 0xf0f2f1eb1ac0a07a153ca20bdd9da9f5e68e0d96a5d89664eda640ce87cc398a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLFL72000680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e286830bedf12d8fd24e61b2f3428eb9afcca2a1e4ab4586bb7afa40246729. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLFL72100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d551a5cd155d393231162470692f218f000be8fed2b99733b7551969faa05a. 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/CHE211900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a2d619a972eaa836e43a6224d00b917f794e813c973c8d4454fe9c5c3c80c. 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/CHE211900079.
Hardcore Empire 2022 - Let the Bass Kick
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ab27e4921464cad40be9e5ad6af5bf7bc0fee07b4e320dffc81b8c491291a9. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLH2L2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467959f9c10477b5352949223883d262daac3e6b09f882bb10e84fb54700dc06. 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/GBKQU2019141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb417dab4042b3dba02dde83fc55dba271a669d10995ea17d9f23e3e40b4c5ff1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLG422000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7af91c8336b1320e2d606638cbc2adb1221e9c191da0e25c997218d28a0ccd. 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/NLHY52000716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef523cfd5fda49891061a0ff07ae47b9cfb32639600d5160efeec4ce2079d0b4. 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/NLHY52000717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7c5648a1c21c9724aca598f8bd3c96b1a8b9a7f963dcb810fbe8de10e10f68. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NLHY52000722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8541145bda36991e736cf6e34eb5be6fbfcae180e1bf6166e052194aace107. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLHY52000713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227f80a4b9f2399105b58566fbffb31317024dbbdfdcb86838885ec2539926cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLHY52000718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ad8b681effb90c4aaab894d69a8c4b81c54b5ddb30acc30770abaca359c21f. 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/NLHY52000715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03b84f80ad460f97e4de0a0b45fef43d44a979873fcb961378bb7df9940af23. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/NLHY52000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9c24ba2e49c881e19a08b76565c8c244f248fdbce184f6f5d26ac6a83b626. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLHY52000712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370fd34a197930b8116ddf1934c6b8ef91eb17222414aab7997eb0140f519482. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHAAA2214729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7303aa8054d6c390c3505a919a3ef78d8b0622f40ae77727d81b4ce974ba84. 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/ATR981252990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde37584658ad0864a51cea028a2e69c5f4ff3b15b881ca241fc23e428d778a8e. 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/CHE212100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa390f0fc93bd7297735f3db39f334c755f8dacde1c0180cdf61db2a373d0fcdf. 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/CHAAA2114728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b638190d617add511f68df8bc915a65183467b8dd52fcc5484a0c18d54db75. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CHAAA2114726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044cb43449c73ff2c13508719a7fb2521650eb85f767f381697624481f403094. 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/CHAAA2114725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44637d71f2dc06c163ded2e7290add3d1dfa80ae94a294a39b280ed0a25279c4. 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/CHE211900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a4981b9081da69b3ceba4ed34ca1b11ba8191c51aefba76fafcfa26b908519. 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/CHE211900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dfb6e4d691a15da13d033e51c1b4770bae086b3a3728a4e62ac33d84758b04. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CHE211900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b5cf88ba057a6c60278597033ea0b3bae10a1991c75e4a93e327f432748c6e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLG3W1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c141b60594936a522ae80c8a8db2a3029c4232f8d0a859c3b5f5053dcdc2c8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CHE211900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1981252f52ae79a8b29ca9f6a56459f67acedd81e6259775eca2a1d111fa594. 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/CHE211900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea58b4ba2d790560f75313d24a3bf69f141adfed7dca6e814c5079fdc6a4e59. 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/CHE211900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf93723b9ea87e94085d08c7214be38fd554dbb10ddb6754673e04e67165b83. 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/CHE211900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc684e3dd4768ff92f3aceba09aaecb9582ba6c559d8c42cab93695eaf39da73. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CHE211900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638fdf4dc2dfd60dd05540ea9e638ff29cd663cec207ec004c237f1e73aaceda. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CHE211900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd164a5aabe233c2cd5db30281eb936cbbf2c486ca8651ed1e0885dd996c6838a. 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/CHE211900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf847198dc371db6b4fa26e1a46c82fd8428a0360832b7c7ac4e666ccf36397f. 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/CHE211900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772f37c9751e9ee530b346e564d4b287acd85d6fc7ef682abe1d914c634241d4. 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/CHE211900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289fe22a3c2abc9de38956799312b6eb88759a1dbc650a6b3b0c6c1baea8126e. 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/NLS762100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba83f432a6d3a7b0d71e7f20cdde5408c05925293251744d2551914787a2a7e2. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/NLQS92100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507cd7efd4e2d9cf5a6bad13074e4c617857862e1b5141c97e7df8ae39e57c41. 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/NLQS92100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672909292e59d8861b12e8f01dce76d03b444aa3d06e2d763a88d750e096669f. 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/CHE211900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68835d1f8375549090ef0411f240148ff7b457813ccd217a3212ec2fab9621b1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CHE211900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46219874ecd5c5fa0d9e1c6665b854306196ef2f7f69b15e2b1aea98817ee4e8. 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/NLG422000031.