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 0x1a189d9d31377885e36979d9403d87479cdb9367a6af46d5c31e5c2f74c85082. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e04fae36-fb91-43e9-9439-40999dc73e17.json and https://artists.proofprofile.net/proofs/artist/e04fae36-fb91-43e9-9439-40999dc73e17.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 0xe17a50ff5708855180a84316d93a9b18c1d2c9626676f26da2af7d1c33d72fa5. 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/USHM92002961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13766b2cba7cb4432d78d06efa97c57553c80e62b488722f787ff49848039ee. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USHM92002962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1224aea50b42f33a82040293532989ba4a99a8d09392d51450a436aa4b40ae1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM92002963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341663e4425ec70e618237b82cfa4e37f65f9e0cec9f0ec031beabfa39475d08. 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/USHM92002964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901b94233f427387b0f2040ae579af3d27a7de5df4b1b92c6194a59b5b154486. 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/USHM92002965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4c0c53b0cb091342357e2d3fe30ede0ffccc24554e29a5cc8435e05177d3c. 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/USHM92002966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6409cc0761ab33a3eb217d9530c64b336e7590ed6b8224d0fec49b650be955a7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM92002967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e5e63820385b9668a4ae69ac6a64057050a4d13c99fd1a7f2b0a0e679418b7. 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/USHM92002968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9449b07c59ab837d985b23e2a8c9c9922a67e176909c413e9c5dd1e683cff22. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM92002969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c334b90a3539ef640abb8c04eb1e96f587399d03edb902344265a90d363a20. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USHM92002970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcbbddceed9bc93e044179e1694197eb50d7ec9e2d6634f8d1518ba964b3093. 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/USHM92002971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b694ec95e2a248e9cdc1a2c49d6377f21c6aa7904988c32fdaf0dd5dd627002. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM92002972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddea642e0d41868e645b435058d0e4de028a9d81467e03628fc28ec000273a9d. 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/USHM92002973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78d55e2ca5a6109090ce3b39d8c3b1f354e29bfa9cbabf966115773e9947b33. 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/USL4Q2081049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb9da6d925b6eb78b837642a3d95a47cb64bf757878c78c917b33b02a151f9d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4Q2081050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770325326d874a7a47d48bcf38ef679347323885b5e2b1f329b466cefc875f4b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USL4Q2081052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b2f7ab3975cd3f06e2d0b24ecbba53abcadbe82118324a20687d93132ba6f4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USL4Q2081054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafdf0ee32b6f0841b8d0c85a87de50691155ebf1a8d84fa6acd316094bbac00. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USHM92002219.