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 0xbf1b127a3d19e93c864767eb1337d532fdd666ac7ae34b47d9be3c99f722fead. 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/8201b1d4-1df1-4113-aa5d-5f08d6573578.json and https://artists.proofprofile.net/proofs/artist/8201b1d4-1df1-4113-aa5d-5f08d6573578.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 0xd2d06ad01a02358c1462200fd108c17d98d34b11afac1b782a660ace0ba01b08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEI1959839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1749aa6f41498875657c17668459b8da660ea9a8522ae7b00f872ca4fb3766. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/DEAR41334333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c98c464d1c894fc4bdd839dfa7a368aa2e075a1dd7ba65e9db35ed07a53b8a. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAEI1959835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d06ad01a02358c1462200fd108c17d98d34b11afac1b782a660ace0ba01b08. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAEI1959839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25404100816ddcd733e9e03d38aaa91379410c80818f27a91eff9a91b737806f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAEI1959840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2604673612ca3d2eda09e3db25dd31343f4a413ce19574d3b64b8f4cd6d30cd7. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCAEI1959842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac4b86a0b47eefa4867fdcee5ca0c4b4e86a649f24be011bf585e5ab20424e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PTEN11900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0a4638ad66871fd545b9511e971139f51a2f53b82a37ae8295922903f74d90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PTEN11900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c36583a7ae59666af782cd7657b7a2b62e6b9da02e2b16f6d8671880c6b04b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PTEN11900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499236a68255967077c8188ed3e02923e74ecee68580be98bc68dcafccc77e18. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PTEN11900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e6205ac6bf456cc994b636db68a2142e4ad422c35378c365665297f377c7eb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTEN11900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88154c4438a0f7adb402e01cc32620f24d01a974b7ace3162e624d195e3091ba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTEN11900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33a8930d442903dce8c971ff2199cb220ff57cb9fed135361cc76079811fb9f. 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/PTEN11900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3836ad55d9c27b8f4c4e2633cdf20324ce38945750080f30e282f3162ecf2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTEN11900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3ec358d2fa2c7405f20b3345ed02f14a2d789621998f1af75b1f3709287c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTEN11900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ae6d33ab02c21e4cb5ca47395d5523dd4c4b97b5c4fbba61d6865cd76e6ed. 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/PTEN11900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2268d505f66e9b3a01bc86de207649885a6dbdd53f30135d17d714d4182fc593. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTEN11900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466fc19f8821633023507a30d31232ced6ba6703efd02de542258252166d116e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PTEN11900031.