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 0xd9aed7e10b7e91b870a628f1d99013c63dbbb1ecc9dfbc8b1d74f80079d47db4. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c351af0e-f8fb-45d3-8a69-c588878c8c04.json and https://artists.proofprofile.net/proofs/artist/c351af0e-f8fb-45d3-8a69-c588878c8c04.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 0x3be01f340f4c5aa03fd3ce92c1f12f818de606029f6e011d4216e83ac4bad071. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAW2566082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5023e5b06fa50ae08992ccfcde7745cc01d49c915eeef731fb7f282b9e151476. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJY2575613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362f7906d0d0836fe508046d5a9b28c38604b94a027b6b97e7c2664c139ff4bf. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXHND2528695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941476ce61aa09877df41c668ee4a28d046e7c055a6ddaa2599128a90dbecf8f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GXHND2528696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb276964bf9b03b12fb6ca1990b64aa1868e78dc593a1f382b7908933864d75. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GXHND2528697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3be70a750e207a0698c2c5f8000f4c5230a7fb96055690a5b53fea3ee6aea5. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GXHND2528698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4068bb8e2bfc6d30b55ef1545e365768b53245a01bcd3b610847fcf6a816e222. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GXHND2528699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ed9847bf4b0af9db3b5427822a415afde342ea3dbe4026afcccb5feabd5bd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXHND2528700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a033cbbf0e6af3fe8b4a03834ca13e17c2265abdc856d1c18a56c54a5c9348c. 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/GXHND2550676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aeb0ebcbe601e659f6f2417bd08061d2ccaec5627392fc4d3025c49e43e99e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GXHND2557853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b0bee17dfcb30ad2151382588e287cfc1c7f52a64f34f61ef0573d23ae35a7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GXHND2557854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a89b6a4d515439f167f116fffcff4b16106dcccb2617361062c52054bafa46. 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/GXHND2557855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc450309860e981f6f981495550dbb8fbd99b461820aa1ec164ce64909e1067. 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/GXHND2557856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf55fd9295e2cc8d33242c6846f57e2736644bb63d4a8409ab54db59671d73b. 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/GXHND2557857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3df5a04e040f663ab7b216c48847accbc27e1996656a1906f0da39982d6264. 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/GXHND2557858.