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 0xf6f6b839f07a8223f5bd7c125159cd2999af91533921cf223fcda010665a9320. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd994ee1-ee6a-4677-abc9-bd3816012304.json and https://artists.proofprofile.net/proofs/artist/fd994ee1-ee6a-4677-abc9-bd3816012304.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Homenaje a los Hermanos Banda de Salamanca
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 0xf02785559959525ed1ba9a7a33277a0ebe63222ceeab6eaa0887f0381552e5d0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM81759598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a522ab1df201a72ce359a91c698c5ce78d7e704ab064ec0ebd5f10d625b4e73. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USHM81759599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d894a7f63064e7d5073e67ecb88a4a6bfd285ca62adb7e25c30a9edba152908. 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/USHM81759600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae8a93f0ef2bf802c057fed1a309eb22044c217bb15e4b3ef8cd54f1fc0bd6d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USHM81759603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168b3892850ec2d7b3090002521bff9b689ddfbf461e03109d9d3a6e0daf3b27. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USHM81759604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0c0f9e27a874d01e2dcf095cfadcc9724b6541755ec3b452402bce05822d9b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM81759605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3acd5dc452704ab0e21fb48c92985de81dff77dd6625d40ab51d35d897138a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81759612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f1c269489e378ca28192bd712d2d0ee2882c7138a5a3e75295a1275b89fc69. 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/USHM81759613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8516ca4c18963455b62c1e1fea930f4e12ec7c26233bf234afeffae679b8e17. 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/USHM81759614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18891ff0afbe7a8d0597c897e95f4ba64e3fd1ca14272e32fcd40a15479b9887. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USDY41831094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9553b08e243c8984039b37516d00966158778691dd1b1ee0a002f01a3651f65f. 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/USDY41831095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e7dd45c6a31349a4f632779f10d352f417c777a563e94c6b053b1480f50625. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USDY41831096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0690edf01db246a59c2ff8465f64756bd8e95b8f1c45126b9123bc5295a6f614. 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/USDY41831099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d83abf004b3711af6d302721d5cb61c64cbbc5f5f0708ed1e87ccda16e895. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USDY41831100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0026570941bacd5d835f5254df0f41956e84ed8cfb54feba31f21d350faa2e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USDY41831102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa310f20ffd6119580bef40adac53ac7d743f4971484b8841de06893d5e08a026. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/USDY41831103.