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 0xbc5591f650dbcc4c4b2f9f8892aef1371eb6f64e4bd815345cf284ed031d08c6. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bbfd3586-8c68-4e67-8b6c-f60be9e1dc3c.json and https://artists.proofprofile.net/proofs/artist/bbfd3586-8c68-4e67-8b6c-f60be9e1dc3c.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 0xad832d0f34f7cba48f33dcd28be0be8a09713a498d190dc072bccc2cce81372e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX3E01800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3616c712e63c04adcecc0aff48694ec102f37e32ed001ddc36bad2650a16cb97. 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/QZHZ42078714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff035c88a6608183c3e32b81d48b6b0ddd81f76358db5120910323e7d1da22c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRRGE1801403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653da2d80a3c5a3839d86e4b4ebead0f2da8d0ede06d4dc89486261909b17b98. 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/MXA3V2422784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1dcd14dc5a9ba820561acd1c5772e7395c664af15bae4936b3d0c26c5aa808. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/MXA3V2422785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18626ccb47ecbff324b4b464522fc147c7d2b7732431faf8f878df5a09da04e0. 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/MXA3V2422558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b8206051991d98493ec73ab43507be03dd484bc2b8450f6d1c7c141a3ae92e. 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/MXA3V2420923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb350bcfc34a746bc37486b949b95d3ca76170c896dd51d655a758a3dc0e8fa19. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/MXA3V2420476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360d82f558292d0bda1b8b13d18fab5a4993ee01508cdbb0bd4630a76d6b0f9d. 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/MXA3V2420308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fee19d7ed18812d39c1e17b1f1d162df11ac13acbb4b486f329f21899d7273b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/MXA3V2420309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03890aef97f2923f9545564da664082b8571073d6480206bc92b8286e6283ab. 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/MXA3V2417312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54135b07431c9b9607aa5bb0688f3910aee110f924c5f2792ba7428a7161b61. 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/MXA3V2410075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb6b6e49dacd95cc39afb91c51c7c523322a5fa541624b7547b71bb303f050b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/MXA3V2410076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a961cbfdd24b55befadb51c9a48092a730131c4d708ca5cead2671776fd2b77. 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/MXA3V2409692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c00813a3519d5f227786f82ccf780505bfcf561401adb487e6f1cf4d68a91d. 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/MXA3V2409693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a85d5100a6636bf2b4640655471dd7fa76c5e6bfd52ba6e619ba55b5ded60. 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/ARC572406118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f804c7557e35d0f1cf463522a86f2e08b2f4ba039fef0cda209981c329e8850. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ARC572405533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5a2b078037e95e82d14a6d5941aff3c6b66d88943496b0a43d68c85154b839. 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/ARC572404573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1c8551869f01a28411d1d91444997e192ac4f8a26ea0a931d90b8588b200e9. 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/BX1K42100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f66883592b08a403777f22d71f57b0fc3c2f93c550cba118325647aab6c16. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNJW2018958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6d8ab79b6663e8323f79a27731c06747fa3f1f118c25ce823333a9f846f808. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/US7VG2021726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b235e23151204702b8d3a4a27bfbabde33a8b929e4fa4f6c1a2381aaab0f3a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZGLM1971680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001de83c093721160dc055a212954531c06baf1c8e9651a99b56f290eea56a93. 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/QZGLS1911683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707de02530ead0e34092cfe906d0c39538968f1510fed5d9ce62aeac7532e3ce. 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/US7VG1933783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9288f090bfc5de3d31cb306b3132fcd069335426f04ad1b6090eb95da7019bd. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/US7VG1933784.
Água, Sombra, Só! - Maffei & Eternal Soul Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7c9821bc21d66ea0fbc803d9c2b9607d6c7918ec696ca19c3f353cd8bf7470. 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/QZ5AB2064538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528cedf7204389b79a5dcc182b85e7085f956ba15c4fe1a45417f6bcbd515442. 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/BRRGE1711241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce7043a3840f70adc5ab19db33701f36cc63619029eacd2e093c542b2f0e97. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US7VG1708802.