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 0xd5404d1ffa5ed93be2e217ce99a744526a34be61239c5037305475076a339b09. 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/4fec9144-e438-4f08-aae9-c0b3a6e5795e.json and https://artists.proofprofile.net/proofs/artist/4fec9144-e438-4f08-aae9-c0b3a6e5795e.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 0x31b9ff574ef9cb6d1c7bb6305121beb70e17e760bedf91d853a2a970f4e6faa6. 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/QZDQH2379232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116dfab1899402a377f9432fa812ca282c0932d8e8c384c9ffa0158de442249f. 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/QZDQH2504780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6192c5d51e80c8ec1efd1e487103f18bdc327bc9fef7ad1e9708ca8ca6662ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDFP2034391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fbdfe6b6960f610abc015c67edc81c76f5a20cefc36d5119c114240b60398a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDFP2034396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bb1228f171a60cf427f8165e8fbec7081c9c33d09295ca92415258efd8e329. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDFP2034400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a105b90b3120889a254b7f66fa7f9dab42dba3d306c8c74e99acc3f911aa4b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDFP2034402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e0b8dd652657ada3d43a7e786afd56db67ad02d6d25b1fd2230d7cd798df17. 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/QZDQH2440379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8a1e333b494ecba5054dde5085fc783f32ce97b3d321c7e7cafdb694f9683. 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/QMSAV1105512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca4a18acd558b146ce6279b053f10ebfb6dd001075779fc4cae8584688a86b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX282405865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3376202a16f32a1a680a5a3832154236e7e8950aa39f2a4e25fa9e3bab3d0f01. 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/QZQMB2106149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a9b4c797e1c6104568ff27b57fbb651bd24567455b0cbb3546704aa1ea619. 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/QZQMB2104276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d70d5346539249d4d512b6998479148528d610de011880d9f22ab4e4e7f200. 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/QZQMB2103177.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3bf8d23509dd50db51c1de8d329bd63276e2bfae1c996f978bc193657058c6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZQMB2101607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c2f34f9abada5cda4f677abafd8b62db9b0a4d12092005479fc610e47b59b. 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/TCAFQ2156443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a0a59c92fa544fdbc9feb9e790cecab050b912c09215b7a3842001da5b419d. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/USHM22031271.