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 0x39921741773fa921c6b9d38f507689a3666968b63c00e49ab32f1c900d9c75cf. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0474fe5-ef27-47ab-82b0-d005ab06096f.json and https://artists.proofprofile.net/proofs/artist/a0474fe5-ef27-47ab-82b0-d005ab06096f.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 0xaf820be5d4da5239e3159c57bcfeabed7ac467f1bb1286fee550230e7b5cb742. 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/GBWUL2162001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9078277202b0abc639bb27504d8b622a4e12cce5bb8f2f60f76af8a0b35cf070. 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/QZS7J2180233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b56f2d5d827cce7f16d0efd41d7748e7513a2242c7a25c8d6d55eaaecb1a68. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZ5FN2275382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea40bec759d507510ee934d2667c700f3933d36ee3f697bae0012c2c34c6ea1d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCADC1776082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe59a1ee2c4c1fcff50e01c39a289ff56b3413d35b34a68a7b4ae2bc02589561. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADC1776105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9078277202b0abc639bb27504d8b622a4e12cce5bb8f2f60f76af8a0b35cf070. 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/QZS7J2180233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8114ae630434e65a0d42fcbd4d57ac63daec230d22bceabe954a0ed36a852160. 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/QZWV32320838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313deb6e8742f8a3b782a9a21c0eb88ef88a3ff3a0de83bd40cf904a35754b71. 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/QZTRX2104171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4ed998217b49693ef547e931c7df77dee7a9038d713932a111eec098c6cd78. 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/QZWV32320842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b8d0785eca5588480489b47a88f7badccb0e41fd0084812fa537ba601e5619. 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/GBWUL2390880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf419e02d5e6b35f76f7fcb634f9b28e822144153241e016ef4913a1f3a1be10f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTRX2106056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7be790d94867c112e6e2c1817201b0c291dd2ac0bb7f98be804794e8e4deaac. 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/QZWV32320847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a768a336b0e144feb22e3b8eefe6a0c566c2ef3c5867836296f850ab91fd27. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWV32320849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f9ef5f937e58cb1487ffa1d49e8e798c92e3953cb871c2b6b90cea7017c715. 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/QZW9M2438511.