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 0x762f99f27453b6ba20e2437e4f91237bead8db27f024b87233dcffe770abe56e. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f92115b-77ff-46e5-a327-d356a54e7ec9.json and https://artists.proofprofile.net/proofs/artist/3f92115b-77ff-46e5-a327-d356a54e7ec9.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 0x0ce0c48006d301f3a6f228c4c3686c1bbf8d9e671fa25aa30bf53b28c4e5de21. 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/UKEX32128587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72fa72604065ed1bf74e56c5f37c2441cbf51b1a90d3321dbd20aeb28215fca. 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/RUA1D2385891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7732ccd37169f2f5bcddf5fafcd0b25e205566c4ac3987d91dc4a5dfceb4b078. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUAGT2351500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2e8ac813a65dba89f4ab36e4d3166a923bcea03d9c6a6c04a1aaafc7fd74bd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRX282459010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d58d311a76d910113c79e34f174690c5ecb7bffd0b3ef412ab97b5f7d0a451d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA0M2440629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037aeae46183fd17e98bc009aad2f82b719afe7e209d78aecbcccc73e4d5e073. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S2575268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037aeae46183fd17e98bc009aad2f82b719afe7e209d78aecbcccc73e4d5e073. 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/FR10S2575268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe01fba95dc6150befc8acb8ed1ec7c55d589624d16a7723a559cb2bbe5b9f42. 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/FR2X42583029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2c4b07d74cf1bcb5aa202c7c9eb630fac1decc8e38d5d4fbf1418b1ddd4a90. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:44Z), 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/FR2X42583030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cd415c618c6167b8d6381f46799599480ef9e71e1568c7723b577b52276e4c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:28:06Z), 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/FRX762590625.