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 0xe691e937b38c5f74ad660e556f0965c14c7a4622a2420f86627a8d540178911b. 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/6e31dc0d-5cf5-403b-9550-f24ffef01b27.json and https://artists.proofprofile.net/proofs/artist/6e31dc0d-5cf5-403b-9550-f24ffef01b27.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 0x013568d65609698069b80f9b8f4434c4c56128a95f915d3a1e9e48740078b695. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPFL01001940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fcb712f3335c92c98659596a31448459e9fee7a398ae1e0c049f0f73a49cd5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPFL01002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7986c1c48edefb7c11ad27258cf933789fad0b934ce8660e06594a27995108b7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JPFL01200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09bf5584d462e70a3eb62f07700d7bdc30f8fb8db035af99c2ad8a7ed9e874b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPFL01201290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a5a23f868b544d8f4aa0e3283850be4f60eb66267a505ae2ddd4085199e47a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPFL01201330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c6fa23842aaf63a5322cbd0844d43b60ecf64963cab8fc3efb7a56545db256. 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/JPFL01300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf431916cfcb36345719a4c5546a4b806a97ef40bf7e764347b8823e65870c7b1. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPFL01002000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3692586d8a349341ed5856d98ce0ec688ac16504363bc0f411b513cb0e8d65. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPFL01002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606e8c6710d31c57ec829e885e0ef4833266d699b4f06b6cf9cdea4499bac078. 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/TCJPU2228351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a6a0add5ed9dd9a7fce142ebaac6f8f4e216a4cee22e857aac996c9cbe586. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPU2228364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507ec06281a6646d7165092336ef74afd67a57a7055800656ff4459472f688ac. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPU2228371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc00a2f10ac8d09643d97daf2ce0ac88a4874ec367097e75158ab4eae6a15ec5. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCJPU2228406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891535da57018edfc32f9d89b806e30eb324c25fcdaf571a50e230045b112257. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCJPU2228410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f60e78ae0cfdc8c0b21dfc5cdebed46248b67444f2a9fed0920a18cf63222a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCJPU2228440.