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 0xfa6e99345eca0205ef34ef19bbe9aebd809969c661bf656a482a4dc9905359e1. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33a58906-c2cd-4ba0-9129-6343fb430dd7.json and https://artists.proofprofile.net/proofs/artist/33a58906-c2cd-4ba0-9129-6343fb430dd7.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 0x53398ad19849f446d4ccdea9814c43d735d4fc298e4d7f1265281e53484b15e5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZNJX2287452.
Sambada de Roda / Cirandinha / Gera Samba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209de40c640ec6c27ed520cb0af9a08029a2e22d7ed34ecad71af19e0d14af84. 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/QZNJX2287453.
Samba de Roda / Tá de Shortinho / Galo na Rinha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee164fd618576902434ead9b87b4df9835c6daf6910ac898c04a50675b90b35. 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/QZNJX2287454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6d1a75c0f37baacfe8eb82bd3a60a39762a3cb237cc957eaae573faa9883a4. 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/QZNJX2287455.
Samba de Roda / Escreveu Não Leu, o Pau Comeu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb6f62ee61ef099aab062f2e80c75276761ab5c8d94bb17e990bd22fca2a4ff. 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/QZNJX2287456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29f09aacfa96ad52e69761d7bf092483eabb6311fb49bbe54c0b45661c2cd84. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:41:29Z), 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/QZNJX2287457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4effbc5da8b98bc5b909391f7b5f04eb217424a73dd8d65dc055e94f08cdd6. 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/QZNJX2287458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678de2b6502499f39b7d0389263ecb25c7e1993912cda99aef893f173b849575. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2287459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffbe1a39c19c45bf2a06ecb66b4d40ecb3a908a690f713d9e05478d422c6559. 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/QZNJX2287460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda83a6b7212f96d7f55f4acc27f310eba6ff2f39bcba368180c995658410b7df. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJX2287461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c5e536da5f95b2817a58b1c4eb244ea45755ffc384a0c0d582b15a2c11b49b. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZNJX2287462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaedc1b3655bd9f152c5f1213696565af66923609926ef43e14f6cf57ca84cea. 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/QZNJX2287466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535da6a5f09adf36e7363bcab7c025ce312bc8c15113f4faa3503ff0c8e1c1e6. 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/QZNJX2287467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3aae7acaa1a9939e0258c3b8abdfcc643e7e35d4b86e41ea922ef0783d87c0. 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/QZNJX2287468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe101155c3ff1ab386baef4bd8014e4003f3343165fa4979ddffa65300459556. 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/QZNJX2287470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0323c5d3d9df3ed3e8210781bc5c897c856d049d420df369863e75daf40081a9. 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/QZNJX2287472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dfb0c6a2fd9f6d20358673d5e485e2c97bf187d160d445c544671a0d0c8810. 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/QZNJX2287473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54491a339050aec2fd83538d5b1548fa622743322f69bbffb01e1ba4566d63b8. 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/QZNJX2287479.
Tome Tome ( Quando Eu Meter Você Vai Se Jogar )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514a1e754ae92b7f950f327e3d7c45c59cb2cccb653fb48f5526e4982650ed6a. 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/QZNJX2287485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacee0def8484cc20ffeb5a78b74f5d94f10c6ce72062dc023e0a74554928ca2. 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/QZNJX2287494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756a6f861768a450e4216bbfcd6822d0267804fd31f5b1441005bbf1ff84dd6d. 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/BXI8B1900004.