thumb|A bar from J. S. Bach's Fugue No. 17 in A-flat, BWV 862, from The Well-Tempered Clavier (Part I), an example of counterpoint. The two voices (melodies) on each staff can be distinguished by the
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 0xc0408803aff303a904acb92715158d4802bd62e365a833eeceffd784dcbb1412. 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/7ba67b67-e5c7-4e6d-aa17-0187ebe56b06.json and https://artists.proofprofile.net/proofs/artist/7ba67b67-e5c7-4e6d-aa17-0187ebe56b06.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 0x76d126a04eb103b7a1046aea76040f6d70bf2b7a60224e754364d67880cbef08. 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/QZ5AB2082516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e65b0eedbd547b8e73af6d03632b5caf6db6ea1fc84768d40698f123fcaa0a. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZGLS1999524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ebe697ba9b6d428b8b4f29fd3c02b01cb42441367b08b19a6cd895cb1f0ca4. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZHZ31903943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070279784a3f5c613da214ceed788cb750aed1107cd91e0ed47a86a701adc664. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHZ42064976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844cc943e91b6f050396c21bcf8e1f8b737dd52de9ebef7955a04186a8ef678d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:44:23Z), 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/QZGLS2151491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3463154b9d16e42ddd6264248bd587e1a7c4774551b26291be11ab8be786c2d3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BRWH82200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ff8a8252ec9d5e2bd83750169c21ff569ea37b00f3a593af86dc3e835cc04. 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/BRWH82200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09420a2648f5ec57d52f477bfd374fc91e7b356bc344dae455d618e0a7cf477. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BXKG22200960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6dd38fbc78b1b19f803ee9d226f07c73d79524e045f8e9ff15efbc6e5915f2. 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/BX1TU2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26666664f8ed5d187cb3ad757ba6e1e0e7718535292d0e4ea21d137f65842a29. 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/BRWMB2401106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851c14806228d7348c643c4728c22f3d31de1189dc7f6dfdc913f327acf45219. 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/BC71I2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12614d5e5df7eae178817c4484624b98564e858bfee9c73e1a7c6e2b51ab4f5a. 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/BCDFI2100006.
Estilo Nattanzinho - Ao Vivo em São Paulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a86bfc0b8efc2ed111f370820260cf8e14f03eab977cae336a92c75b1ce6a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC7SK2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a86bfc0b8efc2ed111f370820260cf8e14f03eab977cae336a92c75b1ce6a3. 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/BC7SK2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b43d8328fd1706597bb5f3b864a23c51206f8b11d4c97df1a9a6f9b4ab83724. 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/BCSG12400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc12ac2a334daa7139f72c9880a93f36589990cdf78d54d69b4ec8da4377618. 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/BCSG12300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e1bc0cf1603b7f760329f54f950e01419ccacb37f340f65c781f658a3bc59. 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/BCO3K2300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90450e97771cf030e22ca2b483c16e45c82461d7264724f7d0ecc568519f8ef9. 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/BC3PG2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90450e97771cf030e22ca2b483c16e45c82461d7264724f7d0ecc568519f8ef9. 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/BC3PG2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f546d7d52e76c77330d97e2bc53f008e7cb5bed5de4cf374d1a39a54cb15128. 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/USUG12309809.