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 0xafe1c20cd550a9699731729be3d1420b51d09e96a4ca532706e8b15d9377737c. 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/1d08f66b-74fd-467b-91ee-34589469e000.json and https://artists.proofprofile.net/proofs/artist/1d08f66b-74fd-467b-91ee-34589469e000.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 0xd68f4b76270dd40e3b787655f924d4972aa39c1ff2c84d2f02f3b0b0a63fa099. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2119762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66370fb707adeab7746e39837fd4a6b7f369e61ddef7225f26f31a751182bf0. 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/GBKPL2158758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66370fb707adeab7746e39837fd4a6b7f369e61ddef7225f26f31a751182bf0. 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/GBKPL2158758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2300ee49f5d48246278cb0f272ec4dff32f57d70276ad16069a419ba0cf977c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2LD2010015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd1381948d28717a04e49cf2bf3703e271253013f9f553d0fb06e7ba920e2f1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2LD2210398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6cccd901fc0ae7a4a595e8a5e832a57b00ad695df510159d8230a149061555. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX38U2148731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67185f60636050f2600328932cfd3d995c49d67ea0e69aa029f3c62197b763b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2110285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0700be9cd86d097ec21f42dedcb6b73f90a7b5377b292445a34080adc9ebeb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D22400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb69ccca4349943e3aec7637734c0cb7c8d431972d2a9fd7b8fb67cee91d11e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA6D22300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee1960ee48eeee6a1e81b0cb96e4f3b0ac831d5e85b066089771a668525827. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb69ccca4349943e3aec7637734c0cb7c8d431972d2a9fd7b8fb67cee91d11e. 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/CA6D22300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac038fd2f9830bcc0e6078da239200e0d1f61ad1d3a497b914879e7d87451fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD1900431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0700be9cd86d097ec21f42dedcb6b73f90a7b5377b292445a34080adc9ebeb. 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/CA6D22400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee1960ee48eeee6a1e81b0cb96e4f3b0ac831d5e85b066089771a668525827. 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/CA5KR2400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945af0849adc01a68f157b65f2ccfb94c9e4aa480b656eacba76359055931036. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBEWA2500060.