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 0x30386756d355dc705b73bfd8bbdbd168622da4bbc1d67a155ea32d06c9076e48. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dca69a6-29ec-43e3-ac12-55cbba10945f.json and https://artists.proofprofile.net/proofs/artist/4dca69a6-29ec-43e3-ac12-55cbba10945f.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 0xb895462a4149db81c482ab6cea7a90b9c1d1b6d909a6dbe96ab346d4ee35d8bd. 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/USUM72307238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa322607b0d7de564846b8d6cf2f58746a8897de4b08175a1897a552821d5e028. 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/USUM72310019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64f50da61072db2b1acd330724aa49cd7028c503218dc4ecc9794f6eb587b0. 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/USUM72310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5f376b8d0aff46cf7953b5453ec16a9b4f842e1cf77a6821a90b843064bf43. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USUM72310015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43f4b1a4a177b905cf6edd8ef58a869eab22753029071fae8ef02ebb21d055d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUM72309374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13736d530edf8d07e700fcb24bb08dc5745ed781ccff2d734ef66b356b4c02d9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USUM72311496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a16931ea3bc7940231982ff482c1da89b44438b36aa680dc8b477708b1d36e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USUM72312405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4043d0d8782f4d84b169bdfab9c31276ee25e9f4a51121a6e4cc49689f5d5462. 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/USUM72202834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c82f80688c91253a17c7b35b8c08902fe8313f5d69cb785879567e03f7f7e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM72202877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e6f40559899995c227e3fcae8d2bef5340d10e47e67e1320b18dd84a65dfd5. 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/USUM72105024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f32b15f4ade8774697c6476e03eef9a97786ee567ed3c7d70c84265bc04ee6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USUM72101780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f64f50da61072db2b1acd330724aa49cd7028c503218dc4ecc9794f6eb587b0. 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/USUM72310020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c82f80688c91253a17c7b35b8c08902fe8313f5d69cb785879567e03f7f7e1. 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/USUM72202877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4043d0d8782f4d84b169bdfab9c31276ee25e9f4a51121a6e4cc49689f5d5462. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM72202834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30a3394949eb98c47918a0eded819ceb302547620b30d2662866ffe3143305. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM72109052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe751693693bc7ee4ecca2c70133c99459b7d2eef5b6aa975d7f3756d8b91d04e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMEU32214377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281a6d8a1ea7d00f8cf6536ba5010a676c8613299a01e94629f353d1f766bdf6. 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/MXUM62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6793df827191b1c571c35819f104031b1c15cbf2f8380ed8e74c0d8ce372fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXA0L2300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f28667175e512337ef54f1be4b089fd5317d4a67dfc5287612c85d10ba1457. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM72308332.