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 0x14e990fa880dcdfd894caaf03dd8e0d7287f55e397fc5919079517b2c2122692. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd561dc4-2dcd-4e9e-b170-066b793ffe54.json and https://artists.proofprofile.net/proofs/artist/dd561dc4-2dcd-4e9e-b170-066b793ffe54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hammer Horror (A Rock Tribute To The Studio That Dripped Blood) [Expanded Edition]
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 0xbfb5d9671d3cd34f6d6974fe0929f7fc7c46b2e233b28354e50aa71f2f494f9f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:57Z), 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/GBAJE8400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d79440e1292752ce5e39dc6fc14fa0f939dc396528221b8ca5599887a601a9f. 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/GBBLY8200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720f8c4039a4b219d307d29c93f6082ada9d920695401b42badb31657931d3a3. 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/GBBLY8000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24257a8b81d7032a348842a1ac38c16007a159a58e4cfb88b64cf8ace6270414. 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/GBAJE0606903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33966b55e07cd82c1061e6b2ef233037589e6cf3ddf6b8bb1794373887cddec. 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/QMFMF1450304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6085c0da604182a4d680ba5f60ac1c2f2d2e40e2751928ae4d84c0497f36f6e. 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/GBAJE8600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1965e9ca39e999d13604e4ffedfb3e31bcbcfa3bdb717fc7b2c398c59d3c122. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:09:05Z), 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/GBAJE8600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d227be8d7b107f13eb33972549acc923d9d71de7189d470cbe2986f313bb16. 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/GBAJE8600050.