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 0xfcdd663ec07f222c72b942d7f0e0f0e3b60c95eabb9f19c8be0aa9dfef306a70. 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/5e40466f-d340-41c1-9727-180db9c60800.json and https://artists.proofprofile.net/proofs/artist/5e40466f-d340-41c1-9727-180db9c60800.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 0xc45ac0d53ccfb8e1e1ae470c7ffea6cb823811bd389c16f8cca5354c0da17a57. 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/BCPRM2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d1f68b84890a4d55a1dc4abded14ba43abc6f8d95ee93e8c4153c742728bfb. 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/QZNJY2170176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3f0ae87edb6b16e5a5190ec3d8de100df7d2231c12ea6191ca251a5d50d27. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BXSSW2300551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06321338ef4b79fa17b876d2766d48ff82a6f069b89bf3ce95ebc797a302cd3d. 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/BXSSW2300552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05c14deeccaee65fd65678e5f031b2f30050fe0b5a54471dc3f44e7f264c93. 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/BXSSW2300553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb47bc86f0ff481f4ec93015419ac8da117e63f92164217d947348764ee43432. 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/BXSSW2300555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabca6cbed3f26c8a9b125fc4bec62bab94de16cd8d5fb09e5d7717ca4330580e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXSSW2300556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc12f7df2873bdf55e5fe12af0d88614782e4caa64494840ba10b4365434fffc. 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/BXSSW2300557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6083265f782a8bcea50ee6baf453b3b92d175aa8a7411bcc207db4619f30a06. 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/BXSSW2300558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d20b8c30d11ef023e9a993612f5fe611a5eb8b76dd44795ac2390d5d76cbac1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BXSSW2300559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddd589a3f75f77b478086a65276bbd3e475a4b1df10b8ab9dc641153847f041. 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/BXSSW2300560.
Assim Assado - Tributo Ao Secos e Molhados
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf30b939dc17e987388c1f3f6e56b70094ceff98546d7e9137a9d9d76cfb7d57. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BRDEP0300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aadb35448f09e823a48987931edc4c3ec83e17b7a361d06c5b9c1ae4f671df. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRPU02400001.