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 0x0cdfb68f02e4a090c4725040732b7fc02a4790feea8c435e1eb128098206baea. 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/6a0ffde7-7a53-452d-8a0a-fbd4d858eebb.json and https://artists.proofprofile.net/proofs/artist/6a0ffde7-7a53-452d-8a0a-fbd4d858eebb.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 0xf705239575cd49b71b2a0d8fffb472febc967153729ddb2c9c50c936d051cd02. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USDHM2029704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a56fa64a8aa3179e35d6d48827d2dfdfa5bcebffbc0bc34aaacdc12ded3b954. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:27Z), 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/USDHM2029707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfceada753e94d49a793088f90340623920179c246a16e9bf6dd12d9402d19. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:09Z), 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/USDHM2029708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345d0ed497e987f0b318c749f95f02b4df6a7f6b91c19c8f112411732b8f2fd1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM2114959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6a11b10ddafa22c8cf16b9d023c5ca50337558d91b1cd4c6057b72e9367241. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:18:40Z), 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/USDHM2205238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452fb6067da00d0ba71928feac17fca24b9a6799087e0c948d6a03d1fbda988e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USDHM2205241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecde1f745916c41515abf7a8d63cd3e8874c46ad1c46d7f75469163e77b6f85c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:34Z), 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/USDHM2300812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68265f8f3e19ac79a3b497291829ebb563b97f6012a391464099a3620bf421bb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USDHM2300813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb92a6d7269b8890992984142f556af2a4d3fe5f0535a125012628138f009573. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:09:08Z), 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/USDHM2300814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff86693d7c4a95eb60e786a7d254b5c85b5fffa584bf60191d42b61a7300ab9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USDHM2300815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4301cc75fd46675dc76488c7c931768f6bad87cf93decdd22196bd1671a8eaf. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:08:56Z), 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/USDHM2306656.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df8a42d6f19036cf4fc994a5a3ede1fc6df5c0d11b7f171d89357257c6afb66. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:43:20Z), 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/USDHM2401758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f881698c5b8cd8a06a2d5fccc1aa8dcc905456b16fe8d08939c64297fc58a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USDHM2401761.