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 0x45b8b94faf4048c99002c521a063b8ff2aea51918d6fd7e6478e577cf9d13d12. 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/5bc5d217-b3c5-41a6-a772-09070ad9ca2e.json and https://artists.proofprofile.net/proofs/artist/5bc5d217-b3c5-41a6-a772-09070ad9ca2e.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 0xc01b73367842781a7836900050f4237b7730731d1dad5afdbf192330dae22168. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWAE31500596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e118f8f4e9834d48362492cf8cf5118ac682e08ae2c7ce3eacc59756f5600e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWAE31500597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09571e8ef74ccaab8052f973af55840f83207e8b15600799909b242958f69040. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWAE31500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61917e4a6be837864e9b8347cef089fd3023b200bac4de695bf6b6a6f40bbc2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWAE31500599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec2a80d6bb0cacef2c3ade1ed527c90410c684a78c63a4a81ccca3ffe3e62a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWAE31500600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a269ded257d1db991fef1c7c108558d753b1d05124171e12b813af17115e5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWAE31500601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1afc15bd72ebb307029c91b18743a4630264e7285fcf09badb7e65cb9d46305. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAE31500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a7a8b8905f64ec23d00beadaa59a91afe0ce34113efbed40dbde87228b471d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAE31500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c1b50c2e1e0d4520a9974723aca16d621691b29aaab89e7242759c340f8e62. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWAE31500604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe649a2041416863650694d0437628136738a40c72355c171023a2e8a1c75bd2f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAE31500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54beb05f5b91a8939adb9fbd57beb886b32002e39c48bf464c3fbaabc15cf7aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWAE31500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0d8c17d2c8262419f8487923129839f2fe9477882302cf352eae6d0e804926. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAE31500607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f65bb9ce3ed16ffdacad42046a49ef11a926bbbd4e19e4aac005d949a7187. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKC372445784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef52c4b0b35e433781c3add5a8acd4965e3c813ed4d777ac65f2ee0521a308ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWAE32101555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169b9434f08eb044074687c894d45510509eb0ac70ee5425de8fac7a0b878be1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TWAE32100313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190201b81ffa7b23391d6de5d2f1de81f5b8c16674dad21c63a0de40cf38106. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAE31901274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0dca003d35d0fab85cde9217071069df3d571ffe46690629a7e0b3dde1e50a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWAE31900540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e93284bb9f3e5cf102604b8f419f0ecfede02eb1f26469c7187af5c27f0410. 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/TWAE31900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202f972c8ab25db424a3c008d013c7e3f4e4ee548da113aedb83f5eb6bfc66a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAE31700587.