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 0x074071e911940b75999f1596773cabc84f733ec75afacc06a17a430b1042c16b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3e64356-c715-454a-af99-98c2e62878ba.json and https://artists.proofprofile.net/proofs/artist/e3e64356-c715-454a-af99-98c2e62878ba.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 0x70b119dcb4a6ceb69401ff36d77d832ff6df15c828f0ab8873a9f0f1b0b1f5d7. 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/BXQQ32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d92e0f1d0cbf41f652cd4adc1af550577471e98d37f3cf223e3439ee569a2. 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/BXQQ32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10f6af6d772a6dced0e12e56b8b0d245eb1978001a9d781d973027ba85a37d1. 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/BXQQ32400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ee2bb776bbbcca90e7ff5c122d80a9d37e2544a2a91beedecf3ddddf49ea9. 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/BXQQ32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfe6d6c52c11112c644b0e8f4386d6c7323d5eb5c0770b1c9bc73fa79008b50. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BXQQ32400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ad3c510c9d010fc6ee1e56f06d9cc7cfa0b41f57895c028e47fac28ac7266. 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/BXQQ32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91612f8c561f338ecec0c7407b77100a49c8499bf9397708345c7fcf909b87b. 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/BXQQ32400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae9a2db0d0cf8ddb76d12b3a0d834fadaaed7077b784af184b7d71327c0f833. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXQQ32400014.
Recanto II (feat. Isaar, Roberto Barreto & Lucas Dan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162234dae655c0fe708fdd72abea5d1975c4b59c435525d1f811acc8fcd853f. 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/QZQSV2100082.
Labuta (feat. Russo Passapusso & Roberto Barreto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b7e7b1d7e8b4d4a61b38107bab3bd922415360f393101469ac8ab01a7dd598. 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/QZQSV2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e68da998c42badc9a5ef3200af679c5192ca84fa13d66dbfc5fc8e66351fee9. 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/USS441200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e11b046c03c2c470f0061c54a9d62ba4a71c6799392b12349372546d93de9dd. 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/BRTV52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b90d00807c86f1249d3b9711acb1c6652e0152c86f51bcf548094715526e54c. 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/BXQQ32000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d864c11ee4ae456fe9cff813d067718be2630be00c5c157228a2726ae45978. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USS441200011.
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 0xf678b97b7e027c14d697af56409fe1d3eed0e93b2ae216fb434b449a01d9817e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BRDMP1900005.
Gente Que Vai, Povo Que Vem (Chora Bananeira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7352f3ca3a7a508f86a46fd7b5d6b43db2215901d6c5373f88e0a69a4c68749. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXNOS2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dd76237d342808453815bf9e43937576dcbccf4aaf653ef475bc69bfc0e999. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BKVAX2300007.