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 0x2f1c10210d63a13215098192bd4c039de7c91c1cf2475bb175bbb3be3947eefb. 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/6606542e-3101-4a6c-a323-7e42622f0e4f.json and https://artists.proofprofile.net/proofs/artist/6606542e-3101-4a6c-a323-7e42622f0e4f.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 0x425fd979e3caf815b4897d5ea4efb08d8e320fff4d3b0a8eede7432f38111a89. 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/QM4DW1696539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddf9a123f1220ebe9759c22d4d1664f7a4c11a7bd1aec2667bec85cbdafcdda. 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/QZES72106277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f25cae507175d2a11fe640710c9c746a4e7d361e09c14f048f9c2aa705d8b. 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/QZK6G2079079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460f866fa43fe34cd3770e008bbd52cf9d56fbf06e72fcbe65b62e61bf870608. 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/QZ4JJ1752822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb4b7dad69a91ea1a4720f13a1f04c2eef1b0f927c88eb410500b13d7a3d8bc. 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/QM4DW1696535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8fd7a47cd774865e73e68484f4fc80cbc8f4d82f9ab2d2df8fcf70ef54a3f1. 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/QM4DW1696536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3118abe4ee3a4497f5d0b9754d2764d3a97e458faaac123ae7379a18efb72044. 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/QM4DW1696537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa98bd919924fc56822ca8f9b1a7045c545300cd461654fc7c13ff7cdfd8039e. 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/QM4DW1696538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7af24c2b374aae78f336e7d461919947a0c59136a31670ca3b915663c85b8a. 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/QM4DW1696540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f08f5da554d58f4a4f868ae7ecff3f291556bcf88a02fb27d32cdbd829a587. 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/QM4DW1696541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219ea9b5f39aa64e03e0fcf6db27dd510457f803c02d8b8fa5a2b28e3f271001. 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/QZHN42138021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155d3849be67fc6aee0510a59baaeb0e5181badcaf32efc02c9b336f3dae835e. 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/QM4DW1696543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddf9a123f1220ebe9759c22d4d1664f7a4c11a7bd1aec2667bec85cbdafcdda. 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/QZES72106277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f25cae507175d2a11fe640710c9c746a4e7d361e09c14f048f9c2aa705d8b. 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/QZK6G2079079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8075e59af44c35e05a907d288fe874a9eb69303a865ec667cfa735f42e3ae5d7. 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/QZHN52088200.