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 0xb59a86d895d6b5a551c47cdc87aa1c0eb7e5b53b586d02353ee534e778e08b0a. 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/3286fc98-7979-426e-aac7-0f3704e51cb9.json and https://artists.proofprofile.net/proofs/artist/3286fc98-7979-426e-aac7-0f3704e51cb9.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 0x394e8ca3f05d4277930a0f922d7ce14632e4d6c67804ffc9ce3f04f097b71c64. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USA2P2142483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394e8ca3f05d4277930a0f922d7ce14632e4d6c67804ffc9ce3f04f097b71c64. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2P2142483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c677479f793595cb1d243d8128c3244d00cec6d2e0b173aa069196d0b1bb2c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USA2P2260078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12443e2c82be514b4356fedbf735e3a52bd1dd7355fe49cff80e9d13c85ae4f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2313027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d1cb5cdf750bea903beed1e47850ed00408b46b5ec7ea982a1fc072cb565f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2313025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5e4c875c9331445ee7d2884557560fb57200fec5492c54371c6ecb321e037b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2P2313028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa8f1ef49e39c6d9ff991765e58f1c6fac8f0d9a6285f546aec3b04d5b0a2f0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2313026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15158025bf525bfa8eb9d7e32f83842a78ccc1b82480a48e54a95488caa1451. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA2P2243934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e0c0bd806fd03595121f4f132fa40327d1753b3f6f6482fabe63c4e5df31c. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USA2P2313022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b79acd9e87a71282a4410f12584deba8ca5249c6cab732b09907360e134f375. 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/USA2P2313023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12443e2c82be514b4356fedbf735e3a52bd1dd7355fe49cff80e9d13c85ae4f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2313027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d1cb5cdf750bea903beed1e47850ed00408b46b5ec7ea982a1fc072cb565f5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2313025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5e4c875c9331445ee7d2884557560fb57200fec5492c54371c6ecb321e037b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2P2313028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52c604916b6fb7d50d8a5e00f8c7d70bc3ac698e2f051b0aae2f77b99e955ee. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USA2P2313029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa8f1ef49e39c6d9ff991765e58f1c6fac8f0d9a6285f546aec3b04d5b0a2f0. 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/USA2P2313026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15158025bf525bfa8eb9d7e32f83842a78ccc1b82480a48e54a95488caa1451. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USA2P2243934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b79acd9e87a71282a4410f12584deba8ca5249c6cab732b09907360e134f375. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P2313023.