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 0x8ff603f836b61870a9accd226117358c54c8e5f73465bc3c560a8d4e3ae9294c. 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/7c332fcf-48d2-4713-9bc9-d43cab2a5874.json and https://artists.proofprofile.net/proofs/artist/7c332fcf-48d2-4713-9bc9-d43cab2a5874.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 0xf739cc6422dc20be5a7c4e4a941046a1fa37cde5d8cddef8641c4bfb9f67b6ee. 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/NLFL71500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae73475f722bae74bcba8a4231fc7592935b3a5ebc3864af4ecbeca822bc39c8. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/NLFL71500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942ae5f2260ff8dfacbfeb0796f737de646a6723a43a3cba3423f6c94a4cfd4c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NLFL71900459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81db308016daa6ac26f38278d55f7c3d8b1a56dec42a9d085c02c73dd961f0c2. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NLFL71900453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404172057e889fb1ef93cca18fb50ebf6a353abfb6b00e009e876f495bc3cea3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLFL71900457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8efb32263d4a8edf6dc99c1b32890492d77dc29ea98522467e385341d8ef6e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLFL72000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76eff5a121519dd8a4636aba46913f74a5c8dfe6fb975b3eb69ba4d7eb63d0c3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NLFL72100909.
Masters Of Hardcore 37 (20 Years Of Rebellion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262db8db8ac038023e02ce1ba0bbcba8da10ccf7b9a0c1236ace017bdc721d5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLS241500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf454d657613d643d8de0c0ddfce6fcd947e0ac8dfb03c9ebdc6fd9f0f85c7628. 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/NLS241500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8a82f55a7d8ab46e500672c98bbc4ab6e8edd72927bc82553c0911c65fb1b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/NLS241500182.
Masters Of Hardcore The Conquest Of Fury
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ba35b29313b5344b4474299427e1a7776d72fc0420f05b3b9f040319ed816c. 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/NLFL71300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ae45cc30fb330c0c324d8cf072990b1811fa539b0475d7754198d09443a4c4. 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/NLFL71300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdedbd278f7d0e68044bbb9cdd71704656d0b0c952797c461032abe8d234c0a1. 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/NLFL71300047.
Masters Of Hardcore presents Masters In The Mix Vol.1 (Mixed Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fb1c336aa38f877be521a4cc40c772c50aeb11cf348702cca530e27479f376. 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/NLS241401819.
Masters Of Hardcore The Torment Of Triton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea58017eaaea381cfacd92e45d492bbdd2d840df4004544f241e10d3bfc705ed. 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/NLFL71200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8948e78f6787a987054fe5cd7a987645154e6e932c3aaa95fd9ec208428463f. 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/NLFL71200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d49fbd6393b07dfaf2e4c39e225685e25a019cd258bd86a7c1018c575a60ce2. 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/NLS241400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec16744b20dd96272141a13bd2bb43bd5d22b748ec749d20175d321eca33f2e. 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/NLS241400442.