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 0xe6af73171cbc0cb9eb9a5d479e39e7ff0e52e185dc169f8956c032a88b916ab2. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a20b360-b9e4-44c1-aac2-fa5f17f30f91.json and https://artists.proofprofile.net/proofs/artist/9a20b360-b9e4-44c1-aac2-fa5f17f30f91.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 0xd531e2dc706240c91fa89ec9023984b58703871230ac3457bb73ce889f93f57e. 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/BR0TN0900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d66d8020c95a8fdbd374e34bf0093ed71cb17d0ef4e543fdc9ef5433c1ee2ce. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BR0TN0900004.
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 0x408ab0848ae10ee6fd1137b5ceda9b9a82ca2a94c3b79930649e4beb099e955b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BR0TN0900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa644404189fd7bb34b3f53da83add88d57db335af74feb3fcd6e32616f97f9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BR0TN0900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e121272498c80a0ccd05e3804ac03199b70efecbf18f715f1c9e68e636dc04. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BR0TN0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1e119e56b995aec1ee218315acaaaaf314d54dfa16dc314f84aa2c66fca39. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR12P1200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6041e213d488a0de45156033b0563146dd9abf26292ff171dab22a1439a797e. 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/BR12P1200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa592a8a45b5e3b7221209871424a90eeb4e2c7b83c394d03ba9a3be9dd5164c3. 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/BR12P1200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10082a96ed3d762a6fc27431b752d69bea6cfc0e4ccb254f49fa01f136b022a1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BR12P1200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea161fd566f7a650720b89b9a6e2bbef11fe0871f08c82568a1c88b31af208. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BR12P1200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b419feeee3353e6665af99967ffe1c98a33684a28410be03cc9bb3ec2b2883e. 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/BR12P1200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c99c9bb16c2cc6657345e77ffc365b40baa84685a9b9b81f2b010ad8e06bc03. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BR12P1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38464d20463b62d67f60431008e2184a9ba0432782e2b2c6ac2ddccdfe2285d7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BR12P1200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ae2e2ef709d2277e366b9209b7954855f7f962e7ad50c556e5c18b2b94979. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BR0TN2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5311cda1bba64e5557550f6496eb5038148a587ec51a4514fa7a7f6e5285ae2d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BR0TN2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b52bdd48be52b2d8dc411a1328802ad6176cbdbfad19d801928459ec2fe636. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/BR0TN2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f94b1f249ec6729260c42298ad257910e96a498237d2eb36c98186f33a47a3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BR0TN2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb241817ffba10dbf8ede871bf02c6552444c09db457eb9d36194ad35f2a5a482. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BR0TN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c1760616fc6ac48ea3acdb78b52db33d318e6b5fd9ec61e30c9675d1c8646. 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/BR0TN2500001.
Mpb Brazil: Brazil, Samba, Bossa Nova And Beyond / A Nova Canção Brasileira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c2bf3d021bbc506473b4d5adfd7c565c792ff6773cff49b6a4e4096b3e6170. 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/BRN401400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6741f163bf427b171f6ef442c0a2a13e9ef020ed0f248b875c273630526ee15. 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/UYMI32000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fed242ede88db2425b9286e8ebc3030a18545101eb0187ee0a534f417884c3. 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/UYMI32000007.