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 0x10fd0b14e758675a1bb50968d2bc13c1ea23f1dec5c90b494f14913807e5dfea. 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/d988bab3-6bdd-4778-88f9-cb4ea93022c8.json and https://artists.proofprofile.net/proofs/artist/d988bab3-6bdd-4778-88f9-cb4ea93022c8.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 0x615e5131825189af1e50b7054166d82e799c380c8f358889e35f23ab512d029e. 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/USUM72302784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630f6ff5efbd11a08207f61f7e98af7f4a2757467d1f28161b0b406f327300b. 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/USUM72021552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630f6ff5efbd11a08207f61f7e98af7f4a2757467d1f28161b0b406f327300b. 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/USUM72021552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fbae539adc7c97dfe7b4770fd7973f3dcb68b60b1d67de6a9dfc550904e846. 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/USUM72023182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979ee9c6f95d2433a86911d5bc926140917c7e174735d42b847c3fd970d8162. 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/USUM72119029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421bc8d832d2714ea0e013347b283d434177d53a512da25e994b8d57b478630. 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/USLZJ1901386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb83cecc46de0f4c6a1715c5a135ac805f517a64596ff834bdb7df812a60ca13. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2207192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ee15fab14c026313e87465ce97c6657765d72a44b1588481c08d1f14b89f90. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2071840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7fbe407dd4e93b2c23496cf785c922970ceb63b8890c0f9169b2cccadcb8a2. 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/TCAEI1943724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928dc4b2ad774a02da93a9af2947bd7eb089624f6cea90bd990f4fc5d2262db5. 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/QM7282125419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb812e576baf7b9c3ab657accb25be848ae6cf49ad1447111f002d0556cf023f1. 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/USUM72307241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b84fb45151c090c3bd6f7760c5b3de6226b918d0efdaae64092a72466124d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P1947737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d9b21d9b6a8f5a086ff75785cef781bb89c300e6daa05408ead1c5802053f9. 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/USWL11900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf1b71f919e551155e081c9e7eae790fb2ce90193060e27bd1dea9bdcb89f55. 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/USUM72021478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a73964b9c3c63f42fbb7bc41e3bfabe67fd24ee20e1a1e485a711925438d359. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72410452.