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 0x58b041737383051be8ec7fcbbf7308ecbc987ff39a322d83272c838c240c452a. 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/0d714397-67bd-4072-9ace-fa9d942e8dce.json and https://artists.proofprofile.net/proofs/artist/0d714397-67bd-4072-9ace-fa9d942e8dce.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 0xee0d415645f1fd340575aa8fe4bd0986e01ef63806b37804b517dc2ac5906ede. 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/GBMMS0801127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cb045fa5e2e5891daced55ee8a130a045811fc5f18d32fb9493d9df7e68add. 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/GBMMS0801128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d56654203b1b68230df9f896b87a801c6e83fa5c942c3d9149486dea33ea38. 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/GBMMS0801132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896e9c585c429f620347345f14046a32350f2e2210c6e217f1f971a8206dd242. 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/GBMMS0800168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64eecd1969409281349f83766eb82c620d394028e84a98c68e8b049d96815c9. 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/GBMMS0800167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca4d4f035d7410be0fa6982e81e544b6ac1169a9f4f6ba60b36f6ca551338e. 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/GBMMS0800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62225503299ca89fa9d0ef0212bad947684fe71f6fb957765f1d753b3abf6dff. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBMMS0800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2aaa849b401c49b3efa5bd5d5355bce290400253391f39402ec091ed674828. 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/GBMMS0800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d08e1d413d93b79724c141255f14cf5541c0b2ee21f74854e0685a3d8eb41e. 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/GBMMS0800171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88034aad62021f01e19b00e81bea45b7e4fb3d4c1ef65b75de0cca473c3e483d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:31:28Z), 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/GBMMS0800174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b9154b65b1f0250ec697ff2d31905da48a5e97a5a86b2fbc7b2127e685fe8c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBMMS0800176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cef57939acd0030cebe0670c01438e8e8868c3fbbcbb5a1ecde8ac9a669031. 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/GBMMS0800172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209398bd76d429a7a66acb95ef29788ac7e25494f40d666377feb144aa20d39c. 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/FR6V80613974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb696c5347f466650b379057ba0804bd4e743144ff38fff2d66f9b7ae08bd856. 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/FR6V80613977.