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 0x43f2e9a7e5c69e1868dc6971eea15ef1c4d3ef9b1c4128ff73b37af91fdbe955. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e8ed5f7-9deb-4b6c-98b5-a7fcea7f6c56.json and https://artists.proofprofile.net/proofs/artist/2e8ed5f7-9deb-4b6c-98b5-a7fcea7f6c56.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 0xb3db5db99bbbd6cd39176b3f9ec25b5d016a5640e9b4274a912cb2f792973ec8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:29Z), 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/JPB602101629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20e8d3f31feb3320f980cfd803fb9d9e32796f4b8c676038c2b96368ae7b1e7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:57:58Z), 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/TCJPY2317783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a5ec4260f9af2289f7275f3e9850666b3860fca7571c95aa3ac6e77e96b41a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPY2317787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5d4369b4d6eaf2b77656bfd6c0c55fca1b67e35b992c65573687da200aff31. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPY2317792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74f1639a18c8e5830da2e271d7043cb5d76b3d8a1d9ed652fb508a11052854e. 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/TCJPU2210627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d45225ec68544d1f2ace9891741008d110d140602e01bfc1976a739a9f7b981. 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/TCJPT2214085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8dd9b2c5aabf572f4fc30eda1b0b36f777e872ab1c61af2a17edf04cb6a98a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPJ1946893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aed05979c75bf4e7d51698a3e158439346012e489449ab658587f46e79e3a70. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/JPB602001689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16a793c90e563a16211e6dc4ca1b6d133779554f31b063e69f4aaedda1636e8. 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/TCJPV2391944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff96854753a5a1eb2f49e789d5d415b099f7beafa4fac42924d126d23eb1fc15. 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/JPVI02201267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be1c20d972f1909bc036011ca7db95db742f3664159c82889f5ba13ece5ca0. 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/QZHNC2260869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cb497e2cc39dace2c8841fca4cc2cc06b530e780754669632683dd8aa71cd3. 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/TCJPN2198052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4398d7d35384ed0270e383f9c10fc9b0272c1f8a90877a0bc94c5ffef6cc4df. 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/TCJPD2402191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39645185325fceb155465216a2ea00721887c555fc92a483d40860a3057235. 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/TCJPE2512350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4679c7612651c33816588f76182d164dbfc4021d3da032bfcbf288e534ba8db. 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/TCJPV2391939.
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 0x20a6d2bc96e39e4e74c477c09eafb87ce03ac47ede868ac71f5a1a1664fa84fb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPQ2128900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceea918c65f34c099734904e3bfb0f1a70b325398f7f390dc1a1a1502959c3c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPWP02000614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8012e78c906b7da6a5fb3986898d10963d6b933681f6f748db6c2108e7219d86. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/JPR962400273.