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 0xb0a022990123b0ca0ff0ba8a6030c7162720b97069f19a161163c7c4852e8a9a. 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/b1f06594-fd97-4cfd-8ee2-3f7a55cf4f4c.json and https://artists.proofprofile.net/proofs/artist/b1f06594-fd97-4cfd-8ee2-3f7a55cf4f4c.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 0x93c2dc5a47ae2c97ff55601a0f846022f493ab19a06792986fd4d81960853618. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX3Q92162103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb63e163af91f595330a2248120d72a77d1b802fef4b3b80875b381a95c24d6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX53U2024385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d84a90cb3431bddaadf65053efdaf3bd922573a053590fed2ad928894b614d1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL3GQ2100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab43dc207d8b5451ede82ed74dae0c535a54a8857b7621a9433f13b0fecade3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL3GQ2100451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd06fd81992892e8e06bf8d566a565e35679fa9f9ef2994663a158ff8b10194. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL3GQ2100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf353d112b69cece515b5f083c1a06c92647d467e2939752872e2914e61f3a1bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWS2481801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098edcd1ff89654dcb9615763b8361b088d1acf9f7e4a10aacd4ea8c691b5097. 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/QZPLS2411784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822fd4d062cea1cc05d7b432b1d7a1403005b2796a05cd83430b804fb1c43033. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL3GQ2500775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d926339a82f501a5ea4cc9e41c2ed764daf84d48745a4cfc4f06f7a527b2d7a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL3GQ2500728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1406569561428af6d2fd51533aac2602f41b1143fc4aaff69a4e158290ea5824. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL3GQ2500717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340b3ba17d59448272dcbea1db3be75f0f846629acf02398e00abddd015a1868. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NL3GQ2500883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a3e297a70b1d3cc3331b2785ef73bd4ab73a9b83fd1adcce0fb0b677362ff1. 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/NLB8R2000314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce164be90e754459648ad78afbe01a1ced7652b341615fded2f69fda3000c8aa. 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/NLB8R2000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850ade82701968e75197faaf6bd39d404ecccd9a77de11d0cafaa9727e0b9675. 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/NL8SP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e415d3e2c795824f26813eb628c74c97f237b8e4bbfe11947ede957a6c68f06. 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/QZK6F2440909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e415d3e2c795824f26813eb628c74c97f237b8e4bbfe11947ede957a6c68f06. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2440909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d84a90cb3431bddaadf65053efdaf3bd922573a053590fed2ad928894b614d1. 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/NL3GQ2100276.