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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae9dba11efc8255d3eea554730f734d48164a9a1eea46d7ebf0aa8cd76e8b9a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc0bed19-50ff-4079-86e6-7b9407c72458.json and https://artists.proofprofile.net/proofs/artist/cc0bed19-50ff-4079-86e6-7b9407c72458.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87912d9a12ee8061b4354c049735733a414d186b50b6ae8b1ea212eb3dc930f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282306309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e2c6e1c6508dd828cfef1915eb3c2ed8edb942e852b91923ad662e8ed8713. 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/FRX282306310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9376de186b14d18b1a7031e94276b3a55ebdcbf693ae47f559b4abd56ae2f85c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX282306311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4b68f292a648e79dd408c84ac54852c7c0504c03029147673b009f8bcdbdbb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX282306312.
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 0xe25f4fa7342c1d18c3fa623dab39aecc5809777e2952d6cb053622f6f117758c. 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/BRB580900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2453802c096bfc7e5103f55d0e9e595af0203be8ed46273b822240ba59542a46. 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/BRB580800019.
Bossa Lounge Brasil, Vol. 3 (Bossa Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1634ac9ff51234add097415ddfa953206e7d59bc044350e3a2d5ee0c1032c9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V81996977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf58e4c539498c53f95adc8439b5735ec31e29251035dccebb815620a6ee4d. 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/BRB580900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aae22ba97d4c2e6d06fcbfdc972b110e28e73f4da8da546458f4145f58b7d67. 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/BRB580900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c161ba17ea6c5b20debf04c73f750df73bbce0b89275ab28447a1d2d54aa384. 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/BRB580900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ba594f7e1f456e6a5ff39505ec1bf02375947fb8ab50d2c5aceb4ce977a4c6. 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/FR6V81584127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a529e8186a1f62e67b965589e29dbed1567dc3a6c82abf1c2dd89579e72ac7c. 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/BRB580900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d949079952c7e728ffa54895ead8776a97b8e05f00ccf4c611690e98e655438. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRB580900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b3a3397f7bce0198dc3310f168b05665d36dec322c0814a45786a1223eeadc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRB580700305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f4fa7342c1d18c3fa623dab39aecc5809777e2952d6cb053622f6f117758c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRB580900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a90ac5fe9c5f56f1d81eaa0261cf2d3c1772b813b72ef7ceb0d1af3bdab9d7f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRB580900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2ba7ea9ed0edf574de90dadfe1867289e283ed36ac2080ac94c282cf89d56c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRB580700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e4d1cba91b8a22643b0ad6f2b340fe6ccde4756cdb178c5fe047e88115e143. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRB580900008.
You Don't Even Know That I Exist - Bossa Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf902368b104fc38707c7abccfd3e34a8a0a6301b63d22a3000124ce4672a4e23. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/BRB580800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809be6c758396ddeb86e522539c297db454b55bad30bff19697ceca8b50bb7f5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRB580900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3660d59f82e087ac764726ac504a6b49132204697282f2d726466160034c2141. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ESA021601298.