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 0x770141c99ee036fde08c5dab64fba519fa47a0ee3f6ec1ecda0c82e2bb545948. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e1a693a-b20f-48cb-b668-22a13b230f19.json and https://artists.proofprofile.net/proofs/artist/7e1a693a-b20f-48cb-b668-22a13b230f19.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 0x6253f0350410c40c017802f5c2da7354f5fdc5e47044d08c8bba5ef496b6f95f. 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/BRNUR0900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb1eb1d60fb5392e9d41b02f710b5d369b1219e81e14c638e6bfc3ea994022. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRNUR0900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f1fd52d18417124980fbcdd58d82ce2bc9b37edfd4e464264a3f55c912e07f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRNUR0900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dca061057dbbc769495763d496dd252fead1835d5724a26bbd089f3b352c6b. 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/BRBOL0600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e1426bd6fc6aaa0634106c9a81d7bcc240d312a86e8dab75f4cce3a3b62ebb. 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/BRBOL0600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5dad4dbf70fdd969a493cbba4ad29e3b113d99804f191dd7a34f6a42d0305b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BRBOL0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b2175c645c29c7ce8ec7388286cc50205bdd21c79552aed31a313db5fc3280. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/BRBOL0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374145bd35303e91d2bccf396379aef0c92763c4a62d436d06bb45622454420c. 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/BRBOL0600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817e852b381c028f08b703f03cb0327a63e83025e711c12aa8bc870123d061b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRBOL0600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ba9126085779436d030a01b743c7876d4f5644542a0ebe13bd6bec6f0ee49f. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/BR4KB1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9fa0fe7a5050982f0df163e924f115a00c0eed60898419432b8887eb5da59. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BR4KB1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2269f867c55cd6df2958597a595bd231805c9a3b2682aaf267a8d201748265d1. 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/BR4KB1300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e76f4559904f5bebdffc0dda2095caf295eb4cb6109652c3c2933e28e931717. 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/BR4KB1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918e870a5a2a1592b6ae37f3f2ffd76a43f73446716900e08be029f07b2fc753. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BR4KB1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd9343f9bb7bde9da05b2e9641fccbc65290c6aeac48bc7fbd7dbcbf29de5ef. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BR4KB1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9249d1bd8fc5817a7f857f463f02933fe90f6c1924688bb2017903cdb9dff870. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BR4KB1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a0aac2f8a2bcce8605b6a97d46257258e0b790a7ecdcb16fd9251b8589f19b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BR4KB1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dc81f44a543b9502ae95de3b4f6a9034f74f5d186711d35defdc6ce17a013e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BR4KB1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e5ad1e7b64f64198ebf43464b180d241a495b816abc9344df4af65d396912. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BR4KB1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04255bcea38fb6b06b38a4a8f0e4b7f72dc374a9e328e142c95265ade564878. 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/BR4KB1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a04ca47b68e7281c30a429fe45a5c4d19a13484aa952d9002572c9d9c39870. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BR4KB1300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5323dc03b5f837393b36584264f99bb9fbe84f7f8465b4f1cf6f26182376fcb. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BR4KB1200002.
Putaria, Baixaria, Gritaria e Bateria! (Demo)