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 0x14173945bb2e9e7993ec287126ececdc8667bc64be45a95bfcec7261e6174b1c. 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/241cd064-41ac-458c-9f9f-ab2f241f0b31.json and https://artists.proofprofile.net/proofs/artist/241cd064-41ac-458c-9f9f-ab2f241f0b31.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 0x783146cd94c146affff98d2d6fbf997ad4663ef0119975011d66eef35351b5f7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BRAPI1100428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a2017fdd181bfed5a47a8fe324f3df71310d88cb2ebab7981c92b6ee3b4b2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRAPI1100432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5b69484fbd22d7bbf7bade18353a32e0af9ab7d80dc20463571d475b19378. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM7281515010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471375aaad53287808854216a733bf669d114633a2f2b5dabfae993c6e476a3. 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/QM7281515014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d21ef04832ef70508f482d2e2bd109478eaffb031894c792c7077e17518116a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM7281515015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3de4dd06599d77afca329f09147b648b4c042e3c5f29b3a94d57955c0606c5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM7281515016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800fa80142e429a1a543761b01707521b65dbb4188ec8084e3338301ccf46276. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM81571845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa816f9d4324029484d362bed011721d06e42de8e9257244fdac52b41ea2df98a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM81571846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf415e2895018c1f1b4a5a915b1735b2536202eac47eab8f892286ce01bc2e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM81571847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318af0c71efabf184087083138a3eff7f9ae85209857c1c7ad0c10aebfd7928a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM81571849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709e02e3174600d571d4649976689fbffc3bf0db95350ae12e381b405dd2333. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USHM81571850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5834acc1f89fac7d716dc18681102c7f4d6fa9a9c901c57ac97718204d549ffe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM81571851.
Essa Senhora (Nossa Senhora da Consolação)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c59000ea3066b49081857c65bf518bec019ecee43a2a35c1e8a39dea723778. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM81571855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb03aee3d0c1e4b8511eb0e89f73697b2306bf7018e9493c3d1bd2adc711e552. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM81571856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5b69484fbd22d7bbf7bade18353a32e0af9ab7d80dc20463571d475b19378. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QM7281515010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471375aaad53287808854216a733bf669d114633a2f2b5dabfae993c6e476a3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281515014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d21ef04832ef70508f482d2e2bd109478eaffb031894c792c7077e17518116a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM7281515015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3de4dd06599d77afca329f09147b648b4c042e3c5f29b3a94d57955c0606c5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM7281515016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6711bb785cffac74854a05168b2eedf53cfeef84bb5f747c368fae6ef1180e7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM7281515017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec71059c55a1951af297fd810d3fd1b64112b4457a8de4f789bb6396f2d2bfaa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM7281515018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9b565ce8f0609ae62b9c1db792a068fbcc37dc6fc955ca2ad358ff9645421. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM7281510403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca34525ea0fdd5ab0e698039f5893a695696bfd4be9abbc21d9e90f1c62668. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM7281510406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e44cb91002ba6cc495b2c30920bf22bf4e4b84df602aa65eeccfe1b8e7d6e7. 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/QM7281510407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6ccb64ae5a41e79c69921a148532702d87af6766951aab7c77d15c67c7d16. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281510410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222bc7866735124661c593182b07ed00775bab4959dc5094fcca1144c45a97e1. 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/QM7281510412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528bf7ffcbd9e094b5945dcac942400454a948a39278df0879658ca25bbdf2be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRAPI1700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f427e23bcd1d4f79d561be6fbb2529f21b16254bc6eec2127c64dd2e856183. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BRAPI1700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38c3d6be9bf9cbf2dd95a448ebbf68d404026681f022c716aa738864d4efdba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRAPI1700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9b565ce8f0609ae62b9c1db792a068fbcc37dc6fc955ca2ad358ff9645421. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7281510403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca34525ea0fdd5ab0e698039f5893a695696bfd4be9abbc21d9e90f1c62668. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM7281510406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e44cb91002ba6cc495b2c30920bf22bf4e4b84df602aa65eeccfe1b8e7d6e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281510407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6ccb64ae5a41e79c69921a148532702d87af6766951aab7c77d15c67c7d16. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM7281510410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222bc7866735124661c593182b07ed00775bab4959dc5094fcca1144c45a97e1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281510412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ea635d4c20ad80405f2eaa7a1a40aa274e51c05317a6b2e0a5a29d8e32dd81. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BCFOI2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9ce5ea770fdc7603728b5f155e94aa62033146b5b564d05b774f980bccc8cf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N22440945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f09acd1e57c330efff38937bb4570bb9e3ca632a94f26cc87073137102e2c. 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/QM6N22440951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf164c6085b1c89ddceb306af52d5d751852bcb26c4a0ecc602d80f8f6cf27a02. 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/BRAPI1100431.