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 0xa198bb778656ffa2fa8113edb87de535b3d2e61858f955ec7ecbe3b3f0a02c7e. 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/fc4b1df1-ddd5-4fe9-bf0b-95b9ae33732f.json and https://artists.proofprofile.net/proofs/artist/fc4b1df1-ddd5-4fe9-bf0b-95b9ae33732f.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 0x0fe0ff0cf296768503b756ab43ad72473bf248d663eaf93a8815bf4954bd5e5d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTVM2152831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532b21e29d3719b2be04522407e7a6891d263281763eac8097bcde09977afd2c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS2349608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276db958ffa4f05a7c554d2390e6936c123a18e11bc64156b193b4e33e6a2688. 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/QZNJV2396110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebdf0731edb1cb8f952a4a9eb90cf846c402aafdd3e48ba97644f6a60e0b368. 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/BCHFD2300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2479bf71c23141ca87daa2a98160b6f79c9baaad209fb910e759c65581af25. 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/QZZ8B2397936.
Hobby das Safadas x Vai Ser No Beco Do Alto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b8808558f17fe1d81914a070d6b5ab346a601ac0a64e033314c566d955f120. 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/QZZEB2330209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ab3e8b6ee1999764d050bb6ff2c336eed0df6dda7aa7d71ef0f5a4630d5a3a. 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/BKP9L2400028.
Coração Partido, Vol. 1 - Romance Bandido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0702d7faf6a7466ce05cac5eed2b80306442ec7630af17a314136b69bd80dbd9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BKP9L2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22258548ddb119ace6b0dc0261270124a6ff51c98a3b8fba61f52c6202efecf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTV32417102.
Coração Partido, Vol. 2 - De Volta Pra Putaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e5d4f869d52d85119fb446b7abf0a36a9217f8b9fa7451310d819c8e49cbf8. 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/BKP9L2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa347c3475686bcc02cd475a667cb712b91008c9687c2a7583efac43256992. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:42:06Z), 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/BKP9L2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd22d784aeb8742ff66ef710280ba7607f72f470a6832da029d20cbf3f205731. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BKP9L2500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b968cbd1d41f8d69cc67b4fcd666808fee4f366fc086f66806ec1ed89888bd5. 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/QZTV32331232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c42f0cfca8607de86b22ac913408d3cbe9f50cf25b01d2d6257c5e9ac26f108. 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/BXTRN2300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6e656ed74fd866116eb13897b3a4771b2b1bf028281ee51cbffe4d072762c4. 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/BC8DD2200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd143fd7a5cbb06bbaa12ab3e10e9a8556caeddb0ab16c30e7f7662a21045e0a7. 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/BXG6R2200810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b8cdf110c8d90ac5d98405c2f7960003e45c7283a11d56cde7c4dc19da7e7. 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/QZMZ92107179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5a4f157b760e414987cbb6d0ad567341a90831ba341b21d0b3b8a5fd327f8d. 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/QZNWV2174588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a2d2f09881b4049ab4c58033589c08c5faca6bb8b0681eb634c885c203cfa8. 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/BC8DD2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e975b63764ea97caa571e7230a23d698c3f38bbf7d463ecda0b793dc046b3d. 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/QZWV32410364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2349c82afbdfee0bc360b58f0ebea01a9c3ca562472ba7a3b19e685d041d359. 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/QZNJX2320796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55a3fc2486c242011254c1ec05bc78358f14d93ab30e77a1d77dbcba7de954. 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/QZNJV2375513.
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 0xe418c731a332405023235f850958365477fdd2dfbf46ffe6410e8baf47eff0f0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHZ32220196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102241096e0927fe73619e94f5af80c2e827c9193c336823a6a785cdf764b5b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BKBBL2200001.