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 0x747344bd5d2436fad32be84334fe5bddaac9cbeb6d4dfffca6332fa55af3437e. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a1a44f8-07d6-4ea3-8af2-c983fbbd155b.json and https://artists.proofprofile.net/proofs/artist/4a1a44f8-07d6-4ea3-8af2-c983fbbd155b.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 0x217c1119293058a41223bcd0fc7d67d26e80a186229bfc73c7fb1cafc7965e7c. 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/BXJWJ1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad2588f3302fce3c4d00c6af772edaf0b0e4819260fd40e0979f4dbfa648a2. 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/BXJWJ1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c281658f30ae393fe8c0d14eb6d2c4b3af018d4fc6a6631245caae37530f0d. 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/BXJWJ1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c46c3d169dec04d5d7dd5e02572cf8e2861bb4f0d74cb9d2e3551866bba737. 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/BRHOA0900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a7e4a7d26c62b325a062c03c2c451843588760067816fbdf5057865979e9bb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRUH02100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb98e808391e41a32351887110099815af0b4d179fa53fa31e1c985185c6ce. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/BRUHO1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd3d03aeb2841a3164aab7a5a5e02c97b7413b3acfd81f8aa1afc3cf0843926. 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/BRUHO1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16bdfcab976a96429e5a7fae634a431c395945abc9d99ad54719567b940bcf6. 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/BRUHO1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc87f356c06797ab9aad982c57d511a95ff977086cde443011d22fe6d981cab1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRUHO1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b9108e094711272044981c06013d0978db290b0ddb8b84e4ba921fc261d37. 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/BRUHO1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bf35a3fceab4897086640a73587fcd2c42d55b4389153b7fbf21419c13729b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRUHO1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb2a28a660bab5af2c037018f93d45e47c78df9865c1d0beaf13be2854178c3. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRUHO1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24813b254fad4ae16db65f49db9492ad79587dbb72f0e0c47522e6057314191. 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/BRUHO1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6464aa34c95401bbe6b306e5985d389ab79d3c903fb63a69cc3987aad94afcb1. 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/BRUHO1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06862089d35166f170e034c42bfef69d4f591ac170b723f9cf1d52afe273e6bc. 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/BRUHO1200010.
Bacurau (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5df3188ab3a41f725de0ea0e808feb5697c42fe677c5a84c34c2faa5b90087. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPGD6900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1cf9433d622f2fc70f3a0ac48d261bbdaa2e0850ba044683af84bbc02b615. 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/BXURC1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf2c91b4614e6d256d6ce4a97dd867d7ad0888ea510973b96a4f4ba7913bd2. 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/BXURC1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6816cee5b48357dab54c6ee06e8eed54e1c6a29475003927ca8bc7ace65bd0. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BRUM71804712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2211c017f31a309554225e884b24d03d0c04ee936c7529aef01e4ea71554ed8a. 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/BRRGE7900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279f6e9d7004a6c60d297ebda8433bb6e43b1371f5ee07d0935d4ed462e3056. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BXURC1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ee217a68a591a2a2bf57b0f35af30298289fb4b8c3875b6d0f3c5321724519. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US5NR1512309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e062415b09d1884171a36e78e987c998b325371a954560455f754d6b83774e9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRMAX1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4d16ee20edd4f02c8ac5e38549cb1b404d264c357d211f8a573de7efedec9a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BXURC1900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7131d032a188fa01262af474a72e3dc4c399acf04a20bfbb0101f83527843. 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/BRBBI1500003.
O Trem Maluco (feat. Coral Infantil do Instituto Pró-Criança)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea43458f3ff62aefc4b9d45efcd937d6428e31a81398cc40ede07d782978650. 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/BRBBI1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2680991b344d12cc4630a47306c4d8c29d9969c510a57f927bf2c9b52fbadbb2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRBBI1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4647ed17829b5e82c34934a8347dd05f11664935bc63a90febc2f5112acd85. 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/BRBBI1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d7d51663b5d67e72532cb7b54d6d1b13adb790e815c377c5fac2926724f6e9. 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/BRBBI1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9857c30d35515107769c2bf3c8bff514d89e1ad55d9285a3de5f933a36f57b8d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRBBI1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31e677afff4df3dd498d5e67a5ab013263c165a6890034033aba87a0da0dd0a. 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/BRBBI1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be7f11c118541412eb1fd453da1ce51bc3c0e8209b030cbacd39684917a75f1. 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/QZHZ62147844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fa66a9cbd94a1583f0c7e2b21ecbefeb6abcd9a3aa01a94c9e9f933f371cbe. 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/BR6HM1400003.