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 0xa526844754bde2c09c3ff793174799445e5a4a929ad437ced85282efb20fd435. 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/c266217b-e296-4b2c-9daf-a177abaab430.json and https://artists.proofprofile.net/proofs/artist/c266217b-e296-4b2c-9daf-a177abaab430.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 0x2bce37f53e7ecf1b5a8ea0d34edda881b8a41a8925189b6716e322b7e83ba2f6. 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/QZNJY2381165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6ee1fd77c93681a85588bfdec829cb78d1662ff47fc7b88fd0ef897820da86. 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/QZHZ42239827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5c73ee127e43284ddb127d215c9c8fe2ec98a0d4e81893ce83c3a4750bffc. 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/BCP3J2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7422dd47f41160f719e5d603641fcbe9bc741b25b563c7366f42d78f8d68a07. 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/SE6TI2011596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66acc1205c4965cff1074c090ba6462230ff959116133e720fce906ade5591c. 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/USHM82009635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549aa5eafe67d4f65af2593d6f92a8e0800c97f92e07d3f4a4c41144eb293b88. 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/USHM82009637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf483fad432f787601f965f420b49f9436bdc5b6fff8ecb34739790e5cdddb615. 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/USHM82009638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd217548851b2504e82ead887aeae7a4a0cb7a099aef3661ca95345ffc8d39002. 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/USHM82009639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab05b5016b934d2f6853098d060c974750b512a9ed8938b668c5627d83c6f0. 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/BKSHK2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d7929b341bf8fa5e7dc437522a6b539eb04f0398228775e61e22f63cad76f. 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/BKSHK2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1abcee7b6b43f023549bc453c0b64c85788b9317467de96a4a5b8aa13db0f41. 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/BKSHK2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cde91bb2f3876c255e2a2dc035c1a8721e21f629d00c5aa4bbad7f0f4cd743. 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/QZTVM2304921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf60d805e8d53f72d389893eb9fc64006251f15cee959c5a009e65524f415232. 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/QZNJW2327447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a7b6f033208f2deb861a158b660cbd44222225aedba23c1951407f9d175875. 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/QZGLM2333345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7009dc968fff5f575aec7e01e89d67a3bfb96e7a203eb0c0f26c55bbcaabf694. 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/BCP3J2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7392ac4f6473b192711f17e9080b412c7f63e6aebe7306f4943f9c190a60ff2e. 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/QZW9M2228026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8232bdd9abfcde44218c1cd7cf4ff10bbfb9b9415a5c2671b447141f390e51e1. 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/QZW9K2243913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ba1e4f5dfa30a9c2d792b8c68c7d65b6079069dfeecb2b3f10627e05787c7b. 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/QZNJZ2286999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc305a7be4bd68f032351df9a10709d5fa47ef5fcb09b1213530456ee5e616c9. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/BCP3J2200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc489c707bd8dc63169b9eec4b484cf6437646c02d1182851dd6e0d683c56c72a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJV2218079.
Maria em ''A Chapeuzinho Vermelho'' (O Inferno Continua)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ffa6d17f38960364164accee360db2edf8e27074d14ec70bb64b3a184a8475. 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/QZHZ32295674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71441929a04e4270384d87206dc0ba6857482a66b2b934d1f7ebf5dd83957f72. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2238828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352b11cd651aad1c2804dd1ebf8b55f9853d75ca059e0b8ab8178f2ea0c6feae. 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/QZ5AB2283875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f11875e9f18f3440ee129877b0700ef3eb661e5080329042fa2f7de2de7de8. 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/QZNJY2149020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc262a046995363e8ef7222af3fff4da5bad716011b53bebf961acba8b2ad5b3c. 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/QZNJV2186233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3789bf1b17c96ee0735870e2569b38f6187117738af9b582ac571052f0e2ae30. 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/QZHZ62116175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c12537c8f702cf41d33f49101320ca62d2166684526412fe864bb2ffa61a246. 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/QZHZ32145471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f9c7b593e67522cd5dc2aecacbaa978b6feb1fc67b6c27b4fa4b15ecf698dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2103913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035550246734f1ce1e93db09a91eda174cc36f8b568f3530f2071a0629dba271. 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/QZ5AB2148198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d3e1bae59d1fb3fbf63a4723ebfd8483ba950f0b4d4682d6c443087110bcb6. 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/SE5BU2071654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883fa28c218ccc931cd4ed96d0b949f526c3288c20e8d58e4081050abc883336. 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/SE5752005361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99618b5dc8c49884ff2997623204f553426c63d37f63d4069d3e7f0433f15061. 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/BKEPZ2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453e94158a9eb1274a7f61b0dfec120ddc7a4ddb3ddf4003ab72e87a89390693. 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/BKSHK2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfe34d4f8593191a1d60a3839a22b81bc5fb96df0e3c295529a23c07b9a584. 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/QZNJZ2476964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda584ee2b99dc7ea7f118b5a2aa2b94f42d968331142fd2a43332b4897c655a5. 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/BK2MM2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6b07dcd3317e815ee350b5c3b44e79b538fb77c1293f910900ee08326a0cfb. 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/QZTPX2312130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f87df195f5537a18bcca0fa0a167134d2d28f76b13057af8df10b455100b0. 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/QM3DF2223358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaca90508e3080f6eb6d7bb600866cda33b71ffc707d3fdf5f7f051a7419322. 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/USANG2234484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb655f0d07374c72a4f20f0a2b08a071bf304bddbd6a110995a98edc3ab9a81. 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/QZHZ62211386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2442c96badafcdd46670dec3f1171e1cd1c875929873b9f5eb45d128e8c9ebde. 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/USCGH2208505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f7783ee058ab8f588654af30bd617b9f6f0dd9f99e0ac6b7ed9de0b3906b20. 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/USDY42153638.