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 0x301e98188880f3fb95d86e938930ee6baff848c53f32108a865828a09c8a1ccc. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa4c0081-9bbe-4c75-810b-2902bcd344cb.json and https://artists.proofprofile.net/proofs/artist/aa4c0081-9bbe-4c75-810b-2902bcd344cb.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 0xe421ff142dcd43b735db0592943cd34f4cde2a562e7a514f5981a9a081da8035. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRFEY1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba308a960e9ee0517510249a5d3006a9e94772ff8e4cae6eeec1e6e686d2b40. 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/BRFEY1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7718fcc14f8ca320291aff79ce857e8ba803e3b4dd52f0b9b19e869aefdcb6. 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/BRFEY1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4479241733a1577215b23ade129eb114e28bafa24da9ac97f021a565ee6757f6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BRFEY1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f685e57aa862a7e957af4c6e5f72cd42969db3caaf3cd4225a9eb9ed661953e. 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/BRFEY1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e5acb3c4923eec8747197f50d756ab19b1e5901fc18f560f8b8ad52642f357. 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/BRFEY1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2cc745cec2fe7b5791cfee863cd054d20be5df33442e05397b2d58e2f9b888. 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/BRFEY1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4b2d03204a1f3a906ab306dd777d20d39bc783bd10ca60a0cc39ff9bb05a02. 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/BRFEY1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a47e903a9795b0aff1879fc349416bf4092c5304d38b67615a643c89eeceb4. 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/BRFEY1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37624d958c13eaef222d70a236ac7432b8fd5b28f81dad3bdc8fe1b781ba66f5. 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/BRFEY1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd49c3448f90c3f348627659097ef38cfa91a6d4613a0f42d51949c41ed7fd41. 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/BRFEY1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea8ecd07ecfaf7efa905e449e0005903eef241a61ea7f03f95ed27c18cfb7a. 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/BRFEY1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8251e945542486fa60e191f6463330a80844d20e6e61ebd8d2d9da65f01895. 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/BRFEY1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52082ab86cd3dcb649fe929cbd98c0aadc7b58161511abd96cf03b74284c9e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRFEY1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc8080a7959fad17f42f74cb94fd2918c3f4315ebee913d23505bb776652213. 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/BRFEY1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d93ae48b36ddd7ae516bd59e95aab4e7ecc07d19560352d89e96cafec4207a. 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/BRFEY1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f93d13414e8b06f52e8a050982f1cdcf2fd2effb7de298bd3b071f3aa7940fa. 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/BRFEY1400011.
Cidadão Instigado e o Método Tufo de Experiências
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb26f97ddd0a0028f9b334798b82d64281936eb49942ed1b1d0c501349f5a33c. 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/BRFEY1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7807b807607f93becb1b5afd79108bdd50a09d59fe70b590179315dc5420ad. 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/BRFEY1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4c35f583fc9617d8c4f8dcb5baf3bd29e0bb188c11b5aee1c781aac5753568. 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/BRFEY1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cde603c429fa6e7ba44283a5b74b2628e3ced98fafa1216d19494bbe1465eb2. 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/BRFEY1400021.
Brazil Classics 7: What's Happening in Pernambuco, New Sounds of the Brazilian Northeast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e1a518c0d227cf9045c19641502226903a92219dc0a5418b17510832e25dc7. 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/BRAGL0600203.