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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eff39ea93b3cb589b5de4d48a4211e9936b91b04d5e6ec7e8edba2ae0437b04. 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/ffbb7d75-c62f-4256-bc5c-af18b767fbc1.json and https://artists.proofprofile.net/proofs/artist/ffbb7d75-c62f-4256-bc5c-af18b767fbc1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd276bfe146de219c42ca496e6f3357b0d5b9a193178e6d6f894b3a79babfb49. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCABW1440752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77980f30adaf2bdbe5e8f8540c09861b82e6c9fcf8995ea3961a812649371a94. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCABW1440754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d8331734415d48926c0b11e16a6d5fe69d7e308a4490c6d2579d3d85b12991. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCABW1440803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf022807a6c04516e9ac7dd810d71d87b6ed4487a70a2903f7840028ea64e0eca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:23Z), 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/TCABW1440808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66726cef2c6e114814e9db9ed5d05d0d389963d5be6dd42737cdd903ba1e4ad. 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/TCACA1489798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc185246b9b033d655cab05e37279d0761ccb4628ae1d65c1a9df6f8459707a. 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/TCACA1489800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e6f66f38cae178338f82d519a5711bea9acaaee2e0223b1f88436684ed9ddd. 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/TCACA1489804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1916daa4ce7d57c068a381a2a4a7d2677f8950a576ac746bd10cffad010683. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACA1489806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399f7354fefe5d53278dba47d834da1c04e063e29deac088d472959cd813afb1. 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/TCACA1489812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5224a2d6ab1582ae3f8922467e5568ccdb23952e0c8dabf13a1cdabc51ed4657. 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/TCACA1489813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab867d1f51d6107bbc0d421ee39abe1452b6e6a15c3d14f190ead590bfc7b5. 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/TCACA1489816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7ccc2a40b0549804bcc9fdacbf5d836cb48150015e244e464d172f9a7e135d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACA1489817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faddf072fa23c64dff1b2602bf1847672fcb9f3a939bb74802b4610ad8c6fcc. 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/TCACA1489824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72734c313bd1c8eb9397898b51989e7b24c32348df6406234f806f7a050356c7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCACA1489802.
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 0xf69ec53a3e389fcc708932eac6dfbb48555f01ebe5d8f746de0a8ed3caf75866. 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/TCACA1489815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0497024995839362160bd3ac6afa47c833b2aec606fb4829b89c8776c1bc82da. 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/TCACA1489820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c056e1115b718ef08ce7ae62c0f11c982e3db5f9342ae7472a5da2350d943c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR2X41552107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28adaed47baf09307dbf0fedefdc27f2596f97d34352660378d4f03911b770d. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR2X41552108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705e7f286633ded66bca5cd6247113b38c87c6e7568d5823c20ba667d44ae72. 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/FR2X41552109.
Recuerda Siempre Mi Voz (Versión Acústica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3939753b32d6a76ba4a7ba519fa106860e9b9cf3afd2b84e6cf8ac6e669d49c4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR10S1663994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d4278aae9fe0e77f1e50c9d0ebed5ff9aa053e0da34b2121f72689f7bce77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X41647320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4b1a2c8b32ce9542f38a3528b32bad82d4413fc4a2fb373ac17c7694cc8909. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:15Z), 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/FRX762305050.