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 0xa2c73b362a977e5dd288e3c1031a9cd0ac3374f49daebc92a3e5b5b2d3977273. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8495827-7d3b-4d43-9b02-e138aa7e19a5.json and https://artists.proofprofile.net/proofs/artist/a8495827-7d3b-4d43-9b02-e138aa7e19a5.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 0x944df2230414716a9d631cf2068703eb270339e5bc0f4e637dff5bdbfc25d5b4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKPL1821313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bd348b393e6604ba6f3a589b7b7c93d240d045e923e90016004a57318df60c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:50Z), 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/GBKPL1821314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35654665fcce91fa5ffcd8eecee7053451fa134bc6fd2276d28bbfc7318d9453. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBKPL1821307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f9b3a64c6ef7bd23439421db9291feef43d2d89c3c5b34a066cb760fd40e4a. 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/GBKPL1821304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f92a948854058f093e72e9c5fe0d5d81247d541945bcb8aa628afe8160c1978. 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/GBKPL1821300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45383864007e6cb5d72eaee1137adf27bb1590f50cb5f70de6b70c9ccc388b0. 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/GBKPL1821301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77739e8abc9ccbfda75e8d5095bb245c8005366318821dd58c7873226ca288ef. 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/GBKPL1821315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d902a62a0f9200fe3dfe38e8c4adcdca10d0b6f9eb73dc17f3472d40cccfec. 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/GBKPL1821302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2cfdb7a7cc0c94aa018b3cbab264586bf4a2026e89a01f19397395fe0bd0aa. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL1821305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5aa250074e848d117e66f61588b9725cc9c4854ff109bfd1f16b2bab2eb7af. 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/GBKPL1821309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4160b38dd06fec8fca30db77008321299f2295a546cac80fbe79f50338347e68. 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/GBKPL1821310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc1a5e155d0b0266a6097259d6d5e430faf63e1a94420e33cbcd1159dc7892b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKPL1821312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641e5a6d969710640702eadbee535072ea084336745feb4310fbfaf706cc5b92. 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/IDA142306186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4089fe13096ebb176e92dbd99871a595f7b853fae3604542b19539c9901221f9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:31:58Z), 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/IDA142306187.