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 0xd673ab8a8cf5c90d12f394ffb65e0d57f2ebef71f94b41c782ab6f5cac1caec9. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e378256-dd3a-4190-96b3-f985ffc6c3e1.json and https://artists.proofprofile.net/proofs/artist/3e378256-dd3a-4190-96b3-f985ffc6c3e1.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 0xdb3253587f5e221b74ef702731df8f50ffb68286264d5434b5e7f6c8868e1ad2. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:53Z), 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/USQ6T0800541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d3e01fa50c7371cc20cedc61834816d806a252dd31d4f6b71374830a5c9f7. 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/USQ6T0800542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d99f386bd95aa668a5840caf5ea50fe0606fb3536a9ef29d4981b06114fe891. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USQ6T0800545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabff370a3f0680aec262c9fe4cf03ceabd71e736db3b4cf4ebf0d0495c42871. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USQ6T0800550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b35b55c257a92ea4a0e74a3dc820a5132b5097b00a1c16ad31cc5cffeb65a87. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USQ6T0800554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdff70d44a210d6a55ff938a51643244ac95ba9b05a641b3be4720a1faa711d. 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/USQ6T0800555.
The Sweeter Side of Latin Soul (Volume II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb76445467d4afd552b1857f6a90edf941e975e53128d82f303de0d54f43eed. 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/TCAGG2278743.