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 0x62caa6b9a79f8482fe343cabcaec9c50977628727f13cdb0bb66c7bac46fd3eb. 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/3d63cb57-6c0b-438f-9748-937c6ec3a216.json and https://artists.proofprofile.net/proofs/artist/3d63cb57-6c0b-438f-9748-937c6ec3a216.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 0xaff7ea103d65cbe8c94a7cf5e41ab212dafeec18a17627ace98f82e551320390. 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/QM24S2100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa533453ecb83ee87eed778db2e09392e0bc72521645470eba59c8a45036026b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM24S2102242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8a203ecb6d57292bbc3d76716e93f2dead94e55ad0da1a9f052f0bb0dbec7. 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/QM24S2200249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419d95c338f35e418ae306eb3537c1fa5720dfb19e660160410cc24e3866d7ea. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM24S2201069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf501f137c649e31e4bd8a385a64766482c9eb081b2682c9f5609711887dd152. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/NLRD52310168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe99e50900adb6a01d0e423aa79b4622d4b28d62a5ad8ea963a9a24ebb816f3. 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/NLRD52310170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf121f8ea996159551f5cac86fc9a675c717cdf25542fc1c8dc05b7bcb2ffc94. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/NLRD52310172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c5dc0c48ad1a4c5fcaf12911cd3b5337e5d57f4241663ba08ef3f0e80ac7d2. 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/NLRD52310173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55b25884392a5331ea86d99a546b3dcf7cce1c2bb946c9bd8c165da879dd17a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLRD52310174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a43d8f964d187c359cce87c9ae37505355f8ddea0df213c79ec6fd4d8e43d2. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLRD52310177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916070ae664dad17f377c75219d4bcca9ca413f19ea4f5535b75c9fc1e144944. 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/NLRD52403602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611d70ccd8c675a3f1e953db492672d94bc45598767b7efa03ba7d43d0fc4b23. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NLRD52403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47235f4314bf3828b15798f78c77f91540aaaef10846bb15eaac89890ffc5b8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/NLRD52403608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f4b27c44dc7397c26f4e85cd4902e965f35ddedc48dd6de60e06f4ba3cc9f7. 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/NLRD52403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b6741ed3676d83bbddffd096a50312aabe4daf398b9323a21349feb705635. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NLRD52403609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598c0f780703db9059ae6bcfc2eac21a20132e8f401fa0c29c2faac492aefc2b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/NLRD52403606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2e932b2fb2cfcaf5fb5655007d632dce894dee42c983be79cf83db101a22f4. 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/NLRD52403605.