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 0x6d7e62f161c38f5aa715385a2015cac69699a4ecf9f4b6d16a0240751cc1ddf1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee4d6de8-d28a-40b4-9436-20547dd52998.json and https://artists.proofprofile.net/proofs/artist/ee4d6de8-d28a-40b4-9436-20547dd52998.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 0x35d653a0ebef98b6eb5b260d1d4d8f569eb304cbe07dc1a8559b8c00eab35a7f. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USX9P2356336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e33b63b645b23c8510b55f257afd84416756fe284f4000018f78bd0c17017c. 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/USX9P2356338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d3808c580529c563f71bd94163345850ffeec83a325e81fa82c5fbb2f93921. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USX9P2356339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dd8b0297d5e5f908ebdde6a0eed4841b4ad80b45d8852d7ee6a5ebc75a33d2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USX9P2356341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cdefc9d7e2caf45f082b50b59c1f6fa5438431875917be23beee6d835646b1. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USX9P2356342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4141be3edf88afda55bbcadcedd41412314c0395fda0a763b9ab744fe23f0396. 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/USX9P2356345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723df2f1c24a762ebf8a8c6c88aad375828de58d48fdd96e431535937bb1b7a3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USCGH2357179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78260a927d16fbb4b4e2d31300086c36b72ee41f6c19a754a68bbe17fde6ee64. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USCGH2357182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0981ff14e34efe426f3137ca91ce8950e814a4c4104c55e87d9adc3a151c6611. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2357183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d5af8292298609e91d9de87633b29e2d6bba5131a1b4bc165229a2aae0e2b. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T11:38:28Z), 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/USCGH2357184.