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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe20c69e9fe3a57f42b607aa404cb8af28a57e799c15e58273d027959ecc04e. 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/42a3b9ef-cf14-418f-a6ce-9a612a9ea6ab.json and https://artists.proofprofile.net/proofs/artist/42a3b9ef-cf14-418f-a6ce-9a612a9ea6ab.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ca48fd0719c433396c44cac68896c33039a13375626120d900d8b2188e98b7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBKQU1764220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50065c746ddbc40685e3ee20186635a93f16f49f14fa36cbb612010bc37d37fa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBLV61804832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc7b4976804af01d4ee7e75fecfbcadb07cc8f2e2f26d477fb7120d4b8c9fe1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKQU1817585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb540a7d88d02c34be6a2277c7c6ffe6d65dac0c2e6de35d84f7905744e83c6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBKQU1817587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271f4ef7529c160ef316315ddbed08a9a64240c40c7355412f25c602b1d84b01. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:21:42Z), 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/GBKQU1908744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899b6dc1bd5c842c54b8e0e6d2c22cbf67c310ae30d26f0f6fe399e959dbaf83. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU1931716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1b5bf097ae4dfb1b8451ecc7fc8c383e2511090b299cd2badb3cee0be775d. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:56Z), 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/GBLV62129762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc78629781466fd1df4d165fc76c7e231495a4be6fcfdb926bb2bca20440dc76. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBLV62129763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95eeb63cd23d24519579f038f86a47fff75b03c1038611741e61b234edd226f8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBLV62129764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e72842f101fd0256333ba2a29b2e1a5698833fb36df848247418842824bbe0e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLV62129766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07be4491ace420422f96d044a4204a81ca798b2b5f49ac85ccf47dd99947940f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DELK12500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e43a8fbb0c6d8824fb0a656226b23061db6654e4b675973090f5cd14ebdcf5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBKQU2587854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcf2e617f39ab170ca40033092eb08b17c08489c72cd125196d38424dde46b9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USQY51380010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a60b3ed8f313f19cbb6e884965bd9f9f80c1995c31d2029816556a6765c2cdf. 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/GBKQU1136784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22df1612607826913d1509ca0ad2e1018d644944c95ee4f444dbe84d64a113ab. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBKQU1143984.
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 0xdb8e46f8b62a48a189f48b7b606f2238357d5d2d80fac11988fde7685c1e37a9. 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/GBKQU2474706.