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 0x2c4dddb87bf492409d799a99539f40909e65b3eae5639b10b6b78c10807f6980. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5855a73a-bff5-4a43-8878-99cdfa94c86a.json and https://artists.proofprofile.net/proofs/artist/5855a73a-bff5-4a43-8878-99cdfa94c86a.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 0x33d817467ec8dceb1287f9299b46820875abfdb46ed22b6e295df1c9fdf4b1ec. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZHN71938075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d0be44c942bfa1225014d178405d7317b886187617f8768e9b421a35c572f2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEN2239685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339ada4774fd98852329ba2ce61b54ac46ae212519ab9dd291ec3c73e39f7b84. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB62245113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054469b8737c267720eea0f61d686f359b0b42acceacb8f8263ee74e8b1a38ed. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN62354574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22a6a6b83658aa112a5864bb437bff82ce0b40952af93606bb16ddcada7c635. 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/QZMER2304097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb7b5555b435f6369ad381aa68403f433c72e99a4b94718a43a9b50e22826b7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:38Z), 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/TR0532214791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc460b0dc133c2151edaaf17267088f2d39e090dd54e71091c4aeb75e13efc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEM2316327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010041427a40bcbd3f40008a6336a64c4060f493e362084d7621a3ba5b17aed9. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTB52426553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7971c42d5628b3a123e96724529f76e5cca0c64e2ef9021fdeb7e7c307812721. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB22541608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95fe29c254c01c5dfed9fadd1864731e75c582f8506d26753674d9d836fc287. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTBF2551200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dae018c353677b3913213ee69426ef0a899168787b0d82d2b0a013159e1331. 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/FRX282337259.