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 0x5130149b4b74c2a1662fc2acb96c2b629da65d228fc37764004703b92dd2cc36. 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/fec82ffb-b0b8-4fd5-a9b0-758b9a578da8.json and https://artists.proofprofile.net/proofs/artist/fec82ffb-b0b8-4fd5-a9b0-758b9a578da8.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 0x4828131df010b7f04babeca5f5251041263aae39050f0df13472fdda2f6e4cca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72431582.
Jeder Schatz hat seinen Platz (Aufräumlied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62740bd966f7e23254ecff6f52c63334a9ed327c49a865c0ce64ab82a118f67c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN82409530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f36253c4815522d3e90042507b3b1dbffeb753eea29c8e970c5b1b5aaddf2c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHN82410130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59d49c6727d2b80266c3efb6614d57a4982c65372fd297c125f40a87885b382. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZK6M2439932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c8e26281e1b0cf673a1402b31cd28963ced6009bb6e21d2b8a7244d3bc571e. 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/QZWFF2438649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75cd961819ecc5c16edb2668b2084d9023050eda0118e92a626f341bb5d75d6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZWFF2438045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208a399e48dc8c2f2512cde01b4f1f19f5a7e438106587009c966f868cda863. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFH2411321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e4211a12877f07a0e58f440101cedcb8fda410d6342304404d004d9d45ed5a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ782416027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93663d1894799b27be4382388e533bd88b3bb74c8694acfc4b51450c54fa57e2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZZ7Q2472469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd377edf8b375e5a41bd052898988f281cc2cfed4991dc69e9c764aafbce192. 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/QZZ7R2462278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7954b3a13dae30f0447d85b2b90d8cce2c0982f7496611d43845d3cbb79a60. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZZ7T2411207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3a06c70e7b43ebf4f96a5d16b07747ffb057c1b9da8f7e40a0e881ae63b75f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ72501374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e361a9858deacf2f3d1c014afb345ec6ce7e7d5ca8b5078cdc582f4fbb9804. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZDA62550270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7cda30728435784901608147e539301a8894e660fb72e7d9233c7b1292ddc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2547876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d7880c391f91360fe504bf289e070859eef5497a461a132abb14fc99d132b5. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTB72596780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05546f4bed1a0cf16b42ff83378e3ac110f213c1e83ff9fd8e5ce1fd3c2f811. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52506630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70059477ce921ca1cc2f2b4236736579bb374af72c67429f1bb60d2738a261c4. 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/QT6ED2502722.