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 0xdcbf6a72f5757cee0d8e53df5b0bb98eef0419f053b55228ca1f67770969ad60. 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/c60644af-c6f3-44e5-affa-801ed141dcb3.json and https://artists.proofprofile.net/proofs/artist/c60644af-c6f3-44e5-affa-801ed141dcb3.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 0x8d6f0b53b97122f6d04e2d6ecc0be929bd6f5459e48c30d2e1718b2323c87749. 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/NLS762400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3025505f574774dc972fa308c916b5c7b652c3c98be87476193fb79ad3f8e6a3. 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/NLS762300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61062e592f87cc0496e942a42e314a095046b1e00bb0721d537cc1c491f2820e. 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/NLS762300596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5497209bd0756cf684531b2b416cf16d9fe3f1b82600d42ff38f973463b584d. 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/NLE802200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbd4e38cf5c52374c89920815bfd58794ff93cb9f0292bcac60a3c2f0f654d2. 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/NLE802200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb627dc61a9ca1a900570b978e70f5f72b4d5afda8dcfd9d3384b1fb4da66f8. 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/NLE802200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a2b01e511fc1e6e69190e3810d79cb70121031cfbe45c869352b6c81d49543. 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/NLE802100640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7265cb7d84072d7957d8550c3bde2320f0cc09ec047235388fba1fafa14c3b2d. 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/NLE802100421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6693fd6bdc0a37299ac32c1e15319a8db5e2b8355c4f62318b9cd5abe97548c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLE802100368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb509a96f00328b5ab2ad92356b571517a1bc0eadd78eed8f2f4152db5a7a8a2. 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/NLE802200667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e015e09f8dd856410bd13c90529e8804cec6dfbd17e4ae39497ede7f9ffcb07. 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/ITC942300782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8375ae4b6f04fa5b2c6a58b76c2229553f72e9ee6c0f773cea36085ce9fe6e43. 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/NLS762400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ae1fc0233f194a979cb54a6d750235d9595fb44d2d825b31d2c83f9ef18c6. 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/NLS762400489.
Explode (Welcome To The Underground - Mixed Cut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4bcc73e25a49a577352974ec15bb9746d789f700f90991b6c2e7a859875b23. 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/NLS762400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b4f97bb40f5d88a179e9d230e0eb2c3a859222f2f2629fba422ae634da3ed. 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/NLS762400493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b16452c4297f8e1dcfd3d87a52e460c34321b682ab211aa3a706bd3a3a7a92. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLS762400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d3e9b1c0aa7f127187d9970bfaed257edac00c22d2e087cc6f583b863f2707. 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/NLS762400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea533f2a40105998134d026c696595ef4480a0d63e9c8fd33fa9bd1a2293f66. 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/NLS762400516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b820151d83905b65b1fbbe84955593a92124c82e9770d9c20edf8fb22b6aed0. 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/NLS762400518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2119754a5ef8baf74eb8a52bfeb8f5cbb00f197b2a4afbf2fad0f11ade5038da. 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/NLS762500141.
Hardstyle Sounds - The Festival Edition 2025