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 0x92303588c74a4445accc684784d239d625e2c62614cc2caf51f6a125dbe77f5f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f855cf20-3147-4526-9688-c949bdf0a120.json and https://artists.proofprofile.net/proofs/artist/f855cf20-3147-4526-9688-c949bdf0a120.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 0x9c59660b6c029242f1931040ddd3b4c6702641f63a51bbab700bfd4bf14aa9a9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FRX202136858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c6e2b0ee9f7edf8b7856d0b4935d48a7ba57773351e5dd2220030f38be217a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/BGA742100898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4057f9205e906ddc64d6cd31cdaf2f284d718e8b1bacf7c100bb2e5225fa67. 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/BGA742100902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a67d76ac0b2a5545160718cba022930be29119acb5e63ab5667fe3b2a062ffb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BGA742100911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c259b1aac6f8f2d2dc72b46be7a8a2f61f21453de0fcdef83b21a9b4919d685. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BGA742200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786a1807a3705d6c531f5215f1279446bc9ea229ab1798ade3ce7a960111a37. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BGA742200929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72317cd00d0fba61620e8c99d61f0d9c420def313e7385d43283d9478a9ddabd. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BGA742200931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9696ea09e486b3f4231ef90c700b32c60cf6b5fe73a0ee7a9495ad85b01f7e. 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/BGA742200933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c259b1aac6f8f2d2dc72b46be7a8a2f61f21453de0fcdef83b21a9b4919d685. 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/BGA742200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72317cd00d0fba61620e8c99d61f0d9c420def313e7385d43283d9478a9ddabd. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/BGA742200931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3605f5c0b06b77383934c92ea2d754dd577a63ea1c89249074cf849881b477c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:15:59Z), 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/FRX762385238.