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 0x305f25504429abf76e39186f97fe1fdc766080ad2071ae2ee7335d0f88cc97ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53ecff23-dd9a-468e-8e2a-f9bb346c0b1c.json and https://artists.proofprofile.net/proofs/artist/53ecff23-dd9a-468e-8e2a-f9bb346c0b1c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sambas De Enredo Das Escolas De Samba - 2013
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 0xb2381c42318160e5ada3fbcc0fd73adf1853f0f1c54fcfe8a41e8f4e9c410a75. 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/BRGES1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df23ec525d96ca057dffe26b8aebaed2b0e28da5ffaa37b8be132ebe3cabe7c. 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/BRGES1000005.
Cordel Branco E Encarnado - GRES Acadêmicos Do Salgueiro
Sambas De Enredo Das Escolas de Samba - Carnaval 2012
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d448fb051b6b25fa1afac49073a540aea0a2c5d2cce2a02af50d33ff0933fa. 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/BRGES1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41232df0cbec5145ad5d7e76273c40eb1293d35e438051c52b5ba846382ca2. 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/BRGES1300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41232df0cbec5145ad5d7e76273c40eb1293d35e438051c52b5ba846382ca2. 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/BRGES1300005.
Escolas de Samba - Enredos - Acadêmicos do Salgueiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2004f77ed26a23bf25aa650c813da2834374dc660fd8c46efe73b04fcc474c. 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/BRSME9300222.
Festa para um Rei Negro (Samba Reizado) [Pega no Ganzê]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b44bf69f3783628081a91d2a791a11d5616c492dfe0036509899201ccab393c. 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/BRSME9300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd8538db58d2c8d7107f85af260f476a21e0882051f5e4a9a435f7948bd871a. 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/BRGES9200001.
Sambas De Enredo Das Escolas De Samba - Carnaval 2010
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436ab39b92058d3cf39f6c1783197331cdbe3dae032cb01703752053f340ed3e. 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/BRGES0900001.
Welcome To The Sambadrome - The Samba Schools Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b99e30488c94ebc1ba9698e2e364e96171775b037691f240d9b737b0f32b4d. 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/BRGES1300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0df91e83615b5c8f1738d1fb790c442a14ff1e588ecd6c4889e938c35900f4. 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/BRGES8800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd192c21ca7350d9ef1e5b110bbab79f693ff9d84c41891f1c7e46290ff886f72. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRBMG9102072.
Sambas de Enredo das Escolas de Samba do Grupo 1A, Carnaval 85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed29c57b04a8ac62ec07174c055f9bd9a66cdf2c70b8df28509e006d1f1f912. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRTTP2100664.