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 0xb3a94acce870e1a53419188435ed0689f75e34898c883c9248d42462b07f9e84. 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/b699ac43-cc9a-4a66-be1b-22ce5ced171a.json and https://artists.proofprofile.net/proofs/artist/b699ac43-cc9a-4a66-be1b-22ce5ced171a.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 0xc80ba7162690400467a2be1915e2d8f8a983281c53060857a58daf3a4082418c. 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/CH7812423941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b19a52e334eba9f18b5ad5a20b63f45dc8dcccaff598fafcb89616212aa29. 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/CH7812350542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe482006b85598853c0b3db15f26d4c491e5d117e95638bb538795b4ae656e077. 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/CH6542246083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba28ddaee7480d07bc70bccc1c114c5f4e0b36efb90bac8588ea3ab367eea68a. 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/CH7812241354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb22b56dfbf1dade4b958570f44c0b14d298391bb85acec9e400af833016165. 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/CH7812358977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58696a80afb0a54b906b8f18ee40a6cdd32752648c47a7a8c4cac0a777d6c653. 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/CH7812357083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f76c428814383cc0f81bb14749d23fefc13bd5e3c77d276bfce470ec38c4c9f. 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/CH7812409038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ba7162690400467a2be1915e2d8f8a983281c53060857a58daf3a4082418c. 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/CH7812423941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd070d329ae1ef7787832a9cc2f50efa97684b6a8bb031759ec85fa0d2fa868. 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/CH7812421324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf6bac14d32efe946c4f868322f2281119c0172b8e9a58d1a3a7c10dfa97c02. 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/CH7812230839.
Cypher (Mohams x Wassim_63 x Emo79 x Dreamerscartel x Tano77 x Yassine x Adaver)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765dec16a121ad649bdc7bdd7fcf1e513b8fb49df34743098700bb85ce84c98e. 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/CH7812225973.
Cypher (Bobby Van Damme x Obby x Yassine x Adaver x Mohams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a6c40620fbb310a8f03ec69a76ea713b6edd2e502adb8ff21aa4c85b5c0ff1. 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/CH7812225974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53fae9a272015d0e67e3b80cfa37f3c6495a9c8efa45955ba3b2052e389d767. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH7812423485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5523dadfd5c09738ecfd9dead102f2f30a5b20b62a454d473547b13e9b5bbf. 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/CH7812423486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb5bcb9d8295f9e3ae9399d918b9a8bec3f684be4f826587645718f68d0be2b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CH7812423488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb880557e362d9aefd90abb17157b7d6a1aed5000113455be40244556b00b97be. 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/CH7812422348.