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 0xbb9564887ba3f2bd7191e7bb8a7b55a41f4be59b7d29ff1bcf169f77e9ac9241. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/290b2b6a-023e-4b38-b297-60b4692ab583.json and https://artists.proofprofile.net/proofs/artist/290b2b6a-023e-4b38-b297-60b4692ab583.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 0x1db6e3b32cde0d1768ec5910758fe5989dfd3ea46569c6e2c2f087118bd7fb93. 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/FRR642300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbe58715d0d78f5590773689494b573f4613701a4c284576b4be4cde46b964e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRR642300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6e3b32cde0d1768ec5910758fe5989dfd3ea46569c6e2c2f087118bd7fb93. 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/FRR642300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab256ca80bfd90936f4c05a67e708f04508be1949488c04f450f86742e77a3c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR26V1631993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9b22e35087483f85c044b744771d881a0b3cfdc1c40abab519ed362785aab7. 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/FR26V1631995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f2bb7a8a0df7abafa54b558ffdaa41407760002c434315b5a653e2685551a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/FRX201849059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120c9f2c50d586fe9c7d8c5b03e248816b07cb5fa4854cf7e2bb5f95ed07715. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:51Z), 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/FRX201849060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30a24803519bec8ad5de45134979c22980b4cc722f74df22d620f6efddc8ad. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR96X2053246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc30a24803519bec8ad5de45134979c22980b4cc722f74df22d620f6efddc8ad. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:46Z), 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/FR96X2053246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15c06078962988584a4f8816514eb11043ab85989ab83bb3de94e5ab131511b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRR642302219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8b3e9553556f3ad33c34504c0c217a3510869e4f0ad08afb8ba662ae064106. 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/FRR642302316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9063deaf24448afd5c57e4ba0057e123672b853945f958f4475a5822bfad2b0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRR642302319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9b68636dd2de2fdd39d20ac1262567e47441dcefbe88b8b8f8362b56ccc325. 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/FRR642302320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337a10fac74c9752cc75c04e4490dd180f335e6db5063ad1bc82593941a9db70. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRS182063784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc774d57c51c285cd37a8b74ad3e099c0f3f519f59a4588beca7479c0bf1c78c3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRPHC1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3519d446c2e9694e1cde8d4334e4be2754fb6d2be46e57e08ebfc9f91b7b38. 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/DGA0L2458805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbfc7ca9874b27081acb0e91418dcc1cd13ba3611a14f4827fb84bc1d226ab4. 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/FR59R1807712.
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