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 0x4f586683023acae99bfcb57e8d3d0191b01e9437f204b81588d3b86ba8c76944. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bb03256-c725-41d4-b3aa-5078e0b1c217.json and https://artists.proofprofile.net/proofs/artist/3bb03256-c725-41d4-b3aa-5078e0b1c217.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 0x1796bd985257dfe24dd52f85a22c8d819d34c444e2602c349b5d9b6c6b2a8b29. 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/PLC062431259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d42eae9479d171bef32d27ab8b48c57ad122f5090556372edf7c685b262376. 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/PLC062432094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb5583b05cce6f837d47f7cb8063931c2474e1f7c4a48b0e403f9b3410cdf17. 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/PLA812380041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd7f496004037546eaf13b9cbeda16be1664f8a3f37137ff8fe70a15d369619. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/PLC062432095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8910a85b309baaf5e28f663557d37d1d57ad6438eec87ff76e7c8c86fc7715. 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/PLA812380036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360346c5d553b5d6a0a7a0ca2e8b6f8993db5fd07166d6e8a804dbe8d616235d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLC062439111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd04c868232169d34fa565f51f99a4504a986b9d76347ece7ebe3d2f0c04555. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLC062414044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33f5e54d96b83ec9ecaedddf27eceab21ffce98b939b317316cad862b46562a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/PLC062418264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4032e01df4b44fe3589c2df3be8c822f86d8534ebe7c3a9fd945d5d78ef06bd. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PLC062423301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de5d8d7b746d0fdd73b634387788b996d710a89ebfd13d734ab549062923bc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PLA812380038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7810eed59770210b71d2f9a91a0709f750126e8076522c06ce0fdc2eacda0bb0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLC062432092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb5583b05cce6f837d47f7cb8063931c2474e1f7c4a48b0e403f9b3410cdf17. 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/PLA812380041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8910a85b309baaf5e28f663557d37d1d57ad6438eec87ff76e7c8c86fc7715. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLA812380036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f3019b133a7a592e7f3e646d251abd2de2e0ff4dbca467fbb313b018d6160. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLV402101422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45d4c2dd6dc65f16c35bd49f13675bb8da3c57012ef8e1d678a5d67b3590367. 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/PL90S2500036.