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 0x9ea7ab37b3df8e1a3fe3579ab8babe15a25637bbd5684521a2555066a180c532. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75bcb3d4-9989-4653-ad53-671958915ce6.json and https://artists.proofprofile.net/proofs/artist/75bcb3d4-9989-4653-ad53-671958915ce6.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 0x6bdfb7f7d024f6bdf8a25075a24968ff49eaf5d0e5f62f32759dde80ebb3eb6a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBZAJ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4411104110d67ada364b6302bdc88250a3e37f23e2e3bfe44d6277f24416b. 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/GBZAJ1800004.
Subtle Audio, Vol. III (Double Album + DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ed9d1c111474c29e42003a5f6ce14e71646f8dee943afc78c67a6334804d00. 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/IEDVS1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6410c5ac89e04031a61141a3dd6b273271fd5f06d305bb139466e0a1c0b992f1. 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/IEDVS1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2e50b9304851c439b464e79fc48f234ce6f827c29ca57ba70c15d4518fd217. 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/IEDVS1400029.
Drifting Away - Intraspekt Drum & Bass Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4705f201219905ca95e5227703f3a2c192f6920f930fe5223ed2108606be01d9. 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/GBKQU1161058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f82b47da3ac0f6b87d9b4db124824585b57abc1c37031f69d70e93aacded48. 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/GBKQU1397286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f006d438591bf1f30050775cef1cd0a98ef3bb57e960ee0b518f6b2d5b707e. 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/GBKQU1397288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655aaa40135468f77a6463afe55031bb5ae6ec45b2d82e5d4505eb2c2a3ab0b9. 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/GBKQU1397293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c7393ac52ff7cd2f1e139fe9c8b5eb8b3cab970c8ac4179ebe9dd3e2a97a5f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBKQU1397291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadbe182f14288575cbc497531847be84e77ac8bacde4cdba585f4dbc4bf229a. 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/GBKQU1397290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28af765f7669fa1312863e6c9a5b6c6f193d2c2d14b5f133ebf7b0f81aa3d703. 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/CH5561900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c94158ebd604210a7a987b92b5fe1372ac0fd7d522757158c95bf893e807b. 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/IEDVS1400004.
Reloaded Vol. III : The Remixes - Part One