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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a71f01453e6a17567d7a288486f9504c5c657b3d3737ca8419c9992dfa8dcf. 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/fbdfd6b8-1c36-4d4b-b662-7176f590f885.json and https://artists.proofprofile.net/proofs/artist/fbdfd6b8-1c36-4d4b-b662-7176f590f885.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb44fb246d421cc5e97b4da6cbce8c3f439bf2d6ccfb7a419a19572d0c71f655. 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/QZTV32374448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254ba6fbea9344d3eeaf737c39e96a897466f079d789f258cd0ea1438e23de48. 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/QZTV32344578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f96f4047f7b2249af8d83f8687a945d2818d5ed847acbe8c0f8f3186731fc37. 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/BXIV82395499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925fffa629f55e098047c6c3c7d20e0c9ea50af74b8fb88359ee61e6789cd0db. 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/QZWDE2388607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77a174410b655d31707e14675eea4e2d8e61a6bbefdbfe000119f7c094dfe9. 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/QZWV32411163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9c2fb8f1e8dd4de836585eb39c4697c04df56b3b8431be82bed32b47202abf. 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/QZZ8A2394856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bbbe34412264946aa3df5e7eecbd31b75cc12c0fb8541e3d963a1c0c7eaa18. 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/BXIV82316864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa271d48b9d76ea3c89fa5827f7ae333d600714f85b0afdd2fe0c5503125f5af. 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/QZTV32376972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a43c9513ba7f4ee8b1740c93ecdc2481c7e0015f74cff99af1cbad3ece3998. 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/QZZEB2306103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6b1f9bffb3ec512e299bdfd835128a91431d7f9329cc71cb4d44dfea3658ec. 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/QZWDE2312725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4923c465283cd466eb67c2fde4034deb5645d93ddfed4d52c61829a974fa36. 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/QZWDE2312728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa799f90370592178891ac17455de5b18980d1c8c83e9e8784dedd878045500dc. 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/QZWDE2312731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78aef6df69c43bff7befc23fabd859c63147f5992edff385b38ad84b79a73981. 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/SE6SA2351880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce14184dc82d39e1d5dc2c29efa1d7a01e08922a5c65cd20f916c968b330766. 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/QZZ8A2481590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77a174410b655d31707e14675eea4e2d8e61a6bbefdbfe000119f7c094dfe9. 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/QZWV32411163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d9d152bd1e48bb11fcced373731b3af84bc915bf05754d9db0d9c5f644701a. 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/BXIV82418362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb16a0a874a28aedd2bd750b75eceb7517003a1257e8a4125ab7e3a4a159bb0f. 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/BXIV82438944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9979129fdecc15a92b40d0d5fc41c33500c35811270e3e9fb62e80d2cb7d546e. 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/BXIV82498196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744551eb38deed4272b013feb2384629e8b615217ebfed8c3fbc671a8901032f. 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/BXIV82485745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262415a133732801a4f3d0a8cd588183462ccce08487c9e6db3dcc57bf2b0be. 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/BXIV82481607.