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 0x2b3987b99a26f90edeb13fb3ba75b7948ca099b4575a80651904f7bc32cb3a69. 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/87656777-494b-408e-badc-f89e0908cdb0.json and https://artists.proofprofile.net/proofs/artist/87656777-494b-408e-badc-f89e0908cdb0.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 0x8034b5e8df75d87a4b69f7d7c5aa79bad95d607b35597f5df9d8235e327ef10c. 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/TCJPX2377023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034b5e8df75d87a4b69f7d7c5aa79bad95d607b35597f5df9d8235e327ef10c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPX2377023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d829b9a91e58f2f387fbff1182a50960172c6ab45cf4816b06d6cdc7c6948. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPVI02305431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4d829b9a91e58f2f387fbff1182a50960172c6ab45cf4816b06d6cdc7c6948. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPVI02305431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a305e1738d1f8eb049e4a86823ca7b896454ce7fa63fe9d0ddc64337773ab3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPVI02305162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a305e1738d1f8eb049e4a86823ca7b896454ce7fa63fe9d0ddc64337773ab3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPVI02305162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54f85e12020568577f45532fcf3ce9fbe3d23993d92e062733436748198fec. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/JPVI02305430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f41891890d9fcfce02335934839e16de78a021f64c349ec0df6369593b7be0f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPVI02401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549447544cdcceccaf2ae0023bcc24b7bbcf0e10d84bfff37ef18d2e3b9a2e9d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/JPVI02403451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deae773e48f15af84616728d39f6068f2b4d00b44e7a75a7cfbb89acbd312d6. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/JPVI02403452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2794f371bde174a1b5844d2e0fba7ed0635caa502ba94edbf78a2d635f871381. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/JPVI02401862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549447544cdcceccaf2ae0023bcc24b7bbcf0e10d84bfff37ef18d2e3b9a2e9d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPVI02403451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6101993dee071a1ca181fd09dcb3b97962674930ade41ccde840315433cfb3c1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPVI02402963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915725ab8ac89aaac52671cb03477f9d857bffe121977eb6f7e50d383c2f7fbb. 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/JPVI02500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280dc8da00f700fc2864b810bf059202b64c5d71a8d2c1a54968c4c934cd1dd4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPVI02502216.