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 0x609add988fdd1a4ccd1a9c05c4ad3c966373e9447924079e54815352de188436. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58aff4b0-726c-4684-9251-9015d57c867f.json and https://artists.proofprofile.net/proofs/artist/58aff4b0-726c-4684-9251-9015d57c867f.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 0x401d486a94daecf17d555906bc96c188b9d077e7fc3a79e69683ecf5cf883804. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282263881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff6ba7087e6233d6d9865388c5b6609f87e1e7cbbc0ff20e6d27acae571f31a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:14Z), 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/FR10S2378245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276ab3ed0d375198723a66da8b30e37cef50373056ba8106f940aba5ce0464d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282308134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed2981e48c42b40d38a6e32b7da5b053ef2c953298471ff67faab9b47d8450b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR10S2406533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71b41c4324d5ddffc8d20da9256eeab40a9e4e015a5b6ea862a96f1e84f460f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:46:32Z), 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/DGA0Q2390186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd78d5ab4e83fe84eea0b9b15c85ab65cb54d8da5a3a0ef4ac210a6fd921aa1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:37Z), 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/QM6N22567609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e198d4af3b0389df32d08731d31b6557b5e915253dec05d24a4535c7745ca5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TRBPU2400971.