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 0x18cb04525d3882dbffa1f32e949688cfe475f670a25e6848a3596764d0b21f6a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9798ab0f-6912-4926-be48-b10159aa5c90.json and https://artists.proofprofile.net/proofs/artist/9798ab0f-6912-4926-be48-b10159aa5c90.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 0x69a9ead8e08ea531d7783260e61a17fa2cea5a30efdadb0ca89d6a03be52c710. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BRATT0300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8123e6fd7b02d4ab83a6e01909cbf828874f651430c132ac90ceb73a6536add7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRATT0400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcea1b6dc5bc2493e1d15c6f6327b490366665a3c721999daf1cfedf23d532b0. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BRATT0400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880f24f51ff64c8cc77643500d24b12e6c9463e5b8378af09cf7a9b1bc10054b. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/BRATT0400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8687f48c81021d05429dee7084adc7e54df1a48f4cc3c555b2c20639e7da1564. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:25Z), 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/BRATT0400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2069dabe4b33dad952f1917f970aa2f133e9fe5951a2858c7feee76ee7a44f1b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRATT0400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4a3429a5e667911892a0be0acb64a01a7145d05594e9b2bc9d0410589fc510. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BRATT0500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467880297d35b82cc20ac755e2d9e94c987889a805093ff47277be56c63ad45b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/BRATT0600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f97c21c2ddb318c488fc00ae1c9b5a4aed6372547144aa100f7ba72089e1971. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BRATT0600030.
Solta o Cabo da Nau (Sobre as Ondas do Mar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592f7304688ba3fb610f3698b43d294940c0c76e3cafe31b87167421a10eabad. 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/BRATT0600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fd0cf52e5cc21b11d7bce7645116f3be02c63b4934b2bc823d6367220ccf32. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BRATT0600190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a764ba5dd44ef3540f52c28c633238460462a785d454e4dcfaa42d82f0171. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:49Z), 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/BRATT0700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204f7b21700dd04703a6710b272c64ed3f0d4c54ecfbde8a3c60a906c6e8f644. 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/BR4GA1300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b3fa7b226322a7fadc62aef5af897589fa8c0ef0ba78fc9705a5d32bf547b8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BR4GA1300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7bfe1dc1e40dff023f42935a9b027cdf0d5734aba7526c1162dd26b4fb243d. 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/BR4GA2000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff6b5f72c12ea57f804a6f368b236e9be639df791ed624c81c31bd2f3f1f464. 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/BR4GA2000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1b85ca3d8c07e0ad38269cb2181f6c3737a9fc24c7fe7997be48fe14e48a34. 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/BR4GA2000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945fa8c33e77a477ff109680135ffffd1ef30e02d8b96191393a0b900473818. 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/BR4GA2000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17f735e8dc3ecf852d6035735655954ac43e850312ff0b3f1247f0535b9a87b. 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/BR4GA2000275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a08a19373839c6bd1b54a4ac22daa6dd7024b42454556c8f03a93c6db6fb57. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BR4GA2000267.
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 0x8cce5ae7ad44c5fec6b2d5251b88a24e5fd9d97ed31806396ff1633a2d3f56fb. 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/BR4GA2000268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4460992ba246d06d0c26c833a96f4d6b346ae2fd2a465244dca0b47665113cf7. 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/BR4GA2000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76af0029f604d140fcb5d12c89c94c17108a8323f2f7c255c5743ebb400d098f. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/BR4GA2000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5340f527ef14fa248df57812fe708c7314c1061abab638e43cdff7f76905ee. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BR4GA2000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fbd71c00c22335aeae6bdf24d9b50956c322109f01bde262a7d465afbe3d37. 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/BR4GA2000276.