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 0xa6a188dbf61f96c1971ba0c3346c7a40aa7f5cff725760677d3ad94e98501260. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec7fef2d-4a31-4559-a79b-662388015578.json and https://artists.proofprofile.net/proofs/artist/ec7fef2d-4a31-4559-a79b-662388015578.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 0x52750d73f68a4d1d84fc0656c0e10f8cc019390e3f278b40ac139c0c819411f4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA82049681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307b991bbdef926dcf5a11c06d2958fbd7f6be4fbb0e0785d70685662f4082f4. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZHN82397274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402db9375fe0de55216dda4323409afc90b9f147763424c721895c6844516e5b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA62511513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4996756e96654cac92b5a089c8864eb2c7ed5e4015ed9166aa75acf8001b35. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:29:57Z), 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/QZK6M2526261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4284e5ad91b4b2d062d9c3c5833318908e5165100569c6d23f52a2c587422f5. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:38:40Z), 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/QZK6M2526263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd452bcf83751c345dc6fcb0aedb80f5c90227c51199483c7040ea6a7773d264c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:16:49Z), 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/QZK6M2526264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa618fa0cc32af567cbb5aa9ae19154e7916170cdd954a1cd14a30604c4214fdf. 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/QZNWV2595085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa618fa0cc32af567cbb5aa9ae19154e7916170cdd954a1cd14a30604c4214fdf. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZNWV2595085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a16c63a77a6c5374a0d95f76742c7e005ecc8fb4137fbafe9b4e9a83d96ed1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZRP52519644.