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 0xdeb3a25c842e284e97b6f441a2d3464cac7442c2ab09cf7f1c00707f7bf1761e. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf80662e-401e-4eae-b3dc-9e4181860c89.json and https://artists.proofprofile.net/proofs/artist/bf80662e-401e-4eae-b3dc-9e4181860c89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Encontro das Águas - Filarmônica de Violas Convida Solistas
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 0xcc4975a766d65fb7c6c3d21aa8bb90af9fd04c6998f6230bc617fbc9baa21cf9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BR2HS1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc65c9b733eb0fa5f481b4a2d91f559a6520e6be0dce34cf820073c01319f25. 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/BR2HS1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21927da1a8414098225e02dbb1f656002c6b4d957e92331d946d3810521773de. 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/BR2HS1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf51a0ad990362e4ed0e93c789d151e666b7b568330015b4fc64ee5e1f05482. 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/BR2HS1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdf4164fa41e0ce97c28d09f8290871b3215ec779374d1f0daee145fafd3960. 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/BR2HS1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e16d75e54de6ed279ecc80cbbfb2500228cfdcb40112fa13441a19587ad9fb. 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/BR2HS1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf344e812b104c258a6baf09bc8ec84ae3767cab63baf0f9bca27e71a884cdb3. 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/BR2HS1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81ec01ef70e8ddd33239ae00f847c22bb5a8dc6d0984b6ab4fdb7835c028dbe. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BR2HS1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a23c01fc1635566f4fb9d60859d924fda9478180099403b59374a923c3dba7. 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/BR2HS1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6d78802569b528323a4c28492a4e9fb04eb6f4af5af86f74a2b10a6a2cf11f. 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/BR2HS1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb970a391a457ef0c9bbe23cec29c57167c0b407cf46841bd2c91c5516f7eec63. 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/BRCZY1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50adea5a1e1a8249f8a20369da2e15bb8fd5c42d701578ab3413857a0572e53e. 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/BRCZY1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e36f1de79945f688531d4d14494828e8e1c09156e8a54d7b139529201553c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/BRCZY1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc16662510f4ef98b62aeb452623785e4e544a3de8b33eae6df064a9577343bb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BRCZY1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f2323fd6892741c43dfd98f78fb7c514ad03ed5927a779a84ff40635a0fc85. 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/BRCZY1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc149798959d454cd3b02ec2665d207703f6a8d78a6aa036a6a8583c08b968d53. 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/BRCZY1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e3c2b6337d1dfa733e65b041d5ac6543b4f480efcdbfe03c549de8aef8dca6. 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/BR7IP2100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef2b765f34fa4e48a91e899460eda6899e1df75b72f828da50a28f0129d7957. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR7IP2100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf090e1697711fb8fe048708af9758b92334b20b4efbc806f28f84ab3b48bfda. 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/BR7IP2100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccb95d5c65add8c7229b0b3ae8e37261bafe4e087fc463652de23a13f875146. 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/BR7IP2100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292a1765ede01896bb4095cd7ffee6ca70fe58e13e39287230cbf4818f158c9a. 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/BR7IP2100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff77e5050b3eb2950a9b7272cb03b8f057909629091f2fd58d7fc2a31c15cac. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BR7IP2100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb1453550c493672195a55f56c39654c62534f45e4e581ab19e95c18537bf97. 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/BRCZY0900005.
Fantasia for Guitar and Orchestra by Alexandre Guerra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b10379c98d2bf97c5a5f5b663afd6ea0df1b12df79392b7fe90bc8d2387055. 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/FR9W11408847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f825d0c83f55e5d5f3e6150a1a2f212a6479d6cc0cc88a0971d3245d3793e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR9W11408856.