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 0x6fc2deb5f69be726ddd292843eb3bf867325a71e53697920546c5ad9e85e861d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7fcd1f7-ed09-4c98-8961-d7a4ae3b73b7.json and https://artists.proofprofile.net/proofs/artist/e7fcd1f7-ed09-4c98-8961-d7a4ae3b73b7.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 0x2354846b6a52fb44b6011e405159df4a1bc5c01098419dc9e1155744ed0eff5c. 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/DEMM42201269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22839c09bb564fee6dfa0662afc41d159e0008f0af10e2f02362f5df13bef1c7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEMM42201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804d7811f32aa8340cefbc7e63ecd72d9289acd5d3b4b5b1be052f07bdff95d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEMM42201272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3396101932b2b6e7cd46e95d43f0f1242404d3f94ee9d7f1f3d5c98c1a6709df. 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/CA5KR2114634.
Undercover Buddies - Objector Trax Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d4fb2513c1895b5a857bd869fc98aa66f7bac6d60f29c28d657fc188a3ba13. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CA5KR2114641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a3ac9f36380a659fd4e074266d82c8128d181faae047a429bb08b82ec0eb5d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GE3331900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48db49233cbac50d021f6a0200454597642fdab8dc189fb4643cd10b0a7c05c6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DECH62000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f51eacead6713655d2ad04c0e077f99e4ccf32abe6d328e83ba55b9f79f36e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEH742216850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e44afb0ce1f5514cefb1437e0c65b5559d3339ae3e6e4fb4c483e1ee4e6dfe. 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/DEH742216854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a2cfe6a3603997706b677ed5ff78bba21a07c9efd394bf438332490657b5e6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CA5KR2322660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fb5b20478c32cc1bb223e49ac3789f245966271c8446299e93758e1cd4a07b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CA5KR2322664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffd7dd6f35e0b0a6659367f191627b62d3092804ea6a5a5e1197152f4ec2fc6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2219922.
INSTINKT: Various Artists, Vol. 2 (5th Anniversary Edition)