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 0xb45d14d17f16835243a904376a184f6925fefb19de63342b7ecf031b9b843268. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fbe71a4-8242-4851-9218-73471fe03486.json and https://artists.proofprofile.net/proofs/artist/1fbe71a4-8242-4851-9218-73471fe03486.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 0x2d82eb7fc2201bc804f0f71242cea6688ba376464838e2ccbf8853385601ac25. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ921105680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef48202179bc32b8f446674761e0e5aedfe3c939f2c194b33308be95a3f4434a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPZ921105681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4affc48be5aa4ab6898905d29812fae82799de90209fc04ad45366f2069fbbc. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/JPZ921105682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5c5de4a65e8fc8acae9dcecd9846c0a71899f8cd989ac4d011ea0a07236eea. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/JPZ921105683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90be051122e79594e523e24e25faaaaf45477102fc0ad5067a68ea45f3808b8. 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/JPZ921105684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664d818046850e53735ce6d4e0538fae8207be7d4b104f8afedbd72f2336bfeb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPZ921105685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd5fd2148806c89b6cfe61c8a91c3ed980d1f0131260372af0bb557f2fd96ad. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPZ921105690.
A Música Cantada de Paulinho Nogueira (feat. Ulisses Rocha & Sizão Machado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35fd6536ca52a0921854f22c85e4f03f22b1104042788b9f496c1520db1296c. 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/JPZ921316557.
Tsuki No Sabaku (The Desert Moon) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b83aa742f7b18336fb7dc7bb14a22b7b47fd79bf0341444b7783a79e4c8418d. 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/JPZ920701162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce98d7772c180515701fc6df9e46dc46f7762f6f8e57bf44e9997f58bbcd9452. 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/JPZ920701163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35fd6536ca52a0921854f22c85e4f03f22b1104042788b9f496c1520db1296c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPZ921316557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6a6a2e5129f02dc2dbaddbc8d45c5b8c624eb080b1e087ec93bb8633713bc. 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/BXCEN2300004.
Electricwood III (feat. Belchior & João Cleber Frutuozo)
Electricwood I (feat. Nico Assumpção & Paulo Calasans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5359684766aab477605ec3e6b34a3f992520a872f24403b929a773d66bfd913a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NLD7H1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd951cd0da695951c7161728f7e010fc3b7bea4d9ab934be9e9225dd900e45. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/NLD7H1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4857c3daf45df222df71218273649114f505816ecd6790a910ff8515114fcfc3. 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/NLD7H1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9194a9a20bd926fc511b22286a28a37445b23e7f16df1e59d6a7cbb6b8985cd. 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/NLD7H1700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d592d0c9eed112d48f81b2ba26cbb5aab246e091b8a3ec88577385b629a753. 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/NLD7H1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5536d3271991ecc86cf9bd61787b406bc3cfa75cc702884ea3590b10aaa1c289. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLD7H1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b35cc66c0103c825616259d985b8996d26ba4019ef2cb7c56b390dca4b84dcd. 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/NLD7H1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101fbdfbd30171cee6a0466c90f3ea7b9b5e7b2a7dbd9906b8a929bf6c30960d. 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/NLD7H1700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd03dccdef6df8c3f4d173bf6fd52fe07f28c33e9c54ed9864272fcbefcde445. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/NLD7H1700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9193f302f0e46d265df6e89ae5151ab6d2c8e6949dd4d6bce32988c808858ac. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/NLD7H1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c228cfad6a3889c97cdc8d7911277eedd76755ec7ff12e1435e1ca7b446d9e. 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/NLD7H1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b976243210e59e18991ad0f6b011b17e6c596408d53b9cd6d56b520e655105. 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/NLD7H1700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8718014d1ad940e3c26786aebf2197b4a396cc05895b700041532a472afb7625. 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/NLD7H1700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556dcc798c94bf5542f47b07fe7578ac0b2604fa83eebfe11f2c181f39ba4216. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLD7H1700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc7b2e5d2228068063460beb9ea2824cef1feeb628fcb366432a8a44a03afd. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/NLD7H1700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000834cc28649482ab4ca36f9134b98116f81ab173961df5f93d04e4964faa72. 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/BXCEN1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad441c14d3c7ce0631c98533aeea29ead411311009848b8ef75dd3353b813af. 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/BXCEN1800025.