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 0xaafa788e3e807dfc32b2fef1e2e6c38a8ae6f85bc94a71c730d97def8a85efbc. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/398346e6-29b1-4938-9ea6-9f215a0f3795.json and https://artists.proofprofile.net/proofs/artist/398346e6-29b1-4938-9ea6-9f215a0f3795.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 0x0a24e898a4a5a476500d60eb0595dbbb054b3031f0d853e810bd1623a8e110e5. 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/UKXN22001654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aa38dc6f9423d533d42f0bc0be430375d349adb14f564481679e9f248e7856. 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/UKXN22001827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5a9d88aeee00f1950a7a237ae80fd2b125814e4a85957d98ecac6f4fe3c65d. 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/UKXN22001713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5192bb46c89b4a776e38663189ebc1f5cf379f943bbdd761771c78c2ad9ef0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/UKXN22001980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a55ec328549a3fd8c957f393cc21ccdc80b1943879a6a0561c1a36af63ccde. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/UKXN22001715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e1e5dfec289ba03d1291036e40f6aa0d20cbe3e84d79c7e42422ccaf5a2f98. 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/UKXN22001981.
Jongo Da Serrinha, Prece A Vovó Maria Joana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe197cb10e922f3a17a8967cfea5540807921cae5c7c1556695260006dd857908. 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/UKXN22001984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a1d7f00d816456e723e4be85d6bdb03d06abf34d8318106ef00aa34c8f81c. 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/UKXN22001718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc25b43e871eacf83318a6c7390c6ec8ddb1fbc0231577c204806b940b06d5a5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UKXN22001988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab99ea15a6d63e53ede8f52a87a50d3bd1e791a6505ff2660b62e0064d0a8d5a. 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/UKXN22001720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc252416269ccd447c90e895e2bbd6eab0f86c565311e7c64ff17c141203f4bd5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKXN22001721.
A Lua Girou , Poema De Jorge Mautner , O Negro E A Lua
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cf3d4deb6efcb1b07cec76fb7248ad3e4c00d5e585f90378ed048d0f6d7611. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/UKXN22001723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7608cc09b2fa18d9ae3cb110c45211dab967811fb4c565104a0e76bf18eebd88. 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/UKXN22001725.
Dançando Caxambu, Quero Ver Quem Dança Jongo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392364cce16669f9016ec74e72dc8e0fa9a73433232c03341e3a89c624397ede. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/UKXN22001726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6934cdf92d9cdbd3d02c0f721f26da93725ac7f97b8f9b1e6b3d76c01190f748. 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/UKXN22001727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f60fa780a7224c495d5a2b284ec2f0df95849100ef279406fbe87f42e9606. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/UKXN22001728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1941e8ae7ad2344e849e6da23436f629d747e3c8795fd0fae7c3daa643eca65. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKXN22001729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8f9f6ba85fd7b4cb79c05c6bd9bf3c12fdd460e7e3052fc6f68ce6c971abb9. 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/UKXN22001730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e425f0a7d0885e1de2be379e08475e2c3fdbe743d3fd0df4735dfff5cb40df. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UKXN22001731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c86645fa4692e7e87566584eda1fe4d8734a37cc722be74655697bfb8a86b. 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/UKXN22001732.
Jongueiro Canta, Ah! Meu Deus Do Céu _ Adeus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f1ebb956320dfe84b4a7ba653fceb6fb52573ca6d90da54d83c963cbc1b703. 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/UKXN22001733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d7fc6514fe8e79b2bda3bbb088526af42e23e2262eae8dba237a925a3c13f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRUKM1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833c53e2367e5eade7f083a51b39eaa8a9478f7583d31b3b65001d827bd3ab7d. 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/BRUKM1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08befe63bf977a6aa08d52215098f5540776c8dc777593eea976e113ca0213c4. 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/BRUKM1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40ad74489b1bcb4d9f8f87ce469b2549fd4e7e737d988befbe4da8857e55b3b. 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/BRUKM1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb821826464ec3d69974bf24cc4f69b1b9df94e8e0d52057e4a6e9553872f2f. 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/BRUKM1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46feee4cf8044b65bdfbb7d5ca28b98b15b90f4da1d58d1f4fdbeb0728b39a6. 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/BRUKM1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8c9b0306d2158b28b39f7e8d0e70192ccb36de5a81f32ad6b07da06c9145e3. 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/BRUKM1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3907a39234d4d8203fd9fcd4c46961905a69fddf5cb5c2f25961dccf466d883. 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/BRUKM1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe12b8c95b754ea443be7258c50f8c577e2bc14fd1f7daec65a9cff7a547b4d7. 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/BRUKM1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d8d8d4d188a8fc0014c48368ae8e82b73542c0883cdbf52f33325c5971c335. 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/BRUKM1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5306f1822935b0e88713ee7d188a906a6d6f2c4ece6ff074463bb69a69717ba. 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/BRUKM1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415f308262c6b2d92bdf2b163bb01115cef0cb6a68426ff4c9614f4c35a5c773. 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/BRUKM1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1472fb5e9b6d3d5fb6635d7fbe4b5122389e737793afbcde55612263e08593a6. 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/BRUKM1500013.