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 0x8416a5434d6c057c7c80a9fb1f30e81fbb98b5ae8c5e967127b887deb9a1d6fb. 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/fc222ce7-ec8c-484a-8f07-6f33bda4ff9d.json and https://artists.proofprofile.net/proofs/artist/fc222ce7-ec8c-484a-8f07-6f33bda4ff9d.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 0xd773f36f441d51d6b587e1287f737e6c4289f42b5e06ee9dceb1b6600bdca7fe. 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/USDY41652285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78374c8c439222adbce8f266ba74fff2f3d5243763b2e3467ca981d82f90c44. 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/USHM21644138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c55386242b9c2bab5000dfeb854da8f62d756bc13206bee6bfa7e7c47b7024. 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/USDY41658234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c62b82401ffd90a17f6250485107c8f24c928b1ce615bc49530b79c36e6c1ba. 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/USDY41658236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642936bca1745719147a3c8c4544c3b6230be959b910df21ed998f489d632efc. 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/USDY41658237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519713eef0591ac8f6f66af933c557c0aeee5a5b1d83f4ca5d9c2a059aff6766. 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/USDY41658239.
Tempo de Cantar, Missa Para Crianças: Tempo Comum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a82536229b78c6288d400b628a32a0d1047cd08fcb7de62fd5c0180efcc499. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRFUJ1100241.
Tempo de Cantar, Missa para Crianças: Advento / Natal
Tempo de Cantar, Missa para Crianças: Quaresma / Páscoa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9a3f5f3270929f990131bd524ba3a63ead0eadb9de9f234d2d7aa19065b968. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BRFUJ1100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65e3ab782ed93f6a5bba1001867f14fd61ed05a5979c75e841e0cb6113924e0. 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/BRFUJ1100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30cd3f13921162d39403d489e59f97a974b7dffd1aaa89262cfabfac5e3f4b2. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM81563288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcd5f8f170298c80ba1421fa7c76bc6f14654b275a1def8e773002515887009. 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/BRFUJ1500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17373864237f485199f6da684449657fe6f95126e5b38782803d3a51fb1f44e6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USDY41658725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4a8c1b48087d3718623bcffbd549a337053c9097155688b081e70cd1caacac. 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/USDY41658730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec0a2766af9bd7bf839c30b41e5d793ac6f386051c02043994ae0dddb9d183c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USDY41658733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbb1c67e0eb1457233036a20968ecacd93deff0a45c2125b96a6c04b82b83be. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USDY41658734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3c45bdfdc56856f1157b49346f2d89fe4d280796e3c6472a585d733bb5ddaf. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USDY41658737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df0b9c8a379f10aa647eed82f2c807ef38cd22c79b50022fdbec997906e32c. 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/BRFUJ1600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763f0be9423dbe571bf0ea21a883f3b1cba869c31cf2b31302397158a0673389. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/BRFUJ1600126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e63f066475459f796cec868fb9a48f567635f5e16714fb46378a79a889f89. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BRFUJ1600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147d519941305f6c7ce007de299a12e07ed66bab8b44275da44d021b4f39c8b1. 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/BRFUJ1600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aaa2a172d9b9829af6c3797a2eead31d6dbee6bc10df198d568118debe4412. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRFUJ1600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ecd8f9598bb02753eee52c2d36e28ba79a4cc6fe7b1f2f8e7eef7e347c665b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRFUJ1600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8980519f2da1c767837f17c4c0490161aaede8b5ee7703fd27d7234804fc8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRFUJ1700019.
Tempo de Cantar, Missa para Crianças: Tempo Comum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce431855dbc0b786daa0497e5cb5e70da49043291d79251908820c43ab23bf3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRFU72200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bf058efe11abc511abcd1c17b1b0a7c4da9b50fdcefb476d2ad6d9d06be786. 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/BRFU72400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189bf5a60050b87a18737aa404b327cf79956b75f655ae42aed04e881241cbf7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRFU72400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ec1a25d079258921342683fe3ac52d9dc6a45229de1fe1751d45dcabc57b2a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/BRFUJ1300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018d42e4de12a763d8bf7accc591e51db0cef814fe481f56c7ffe0e4c71ab990. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BRFU72300009.