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 0xaa1b8cd333f19ee208bf0d9b1806f00da8d6f3366d814e501790c716aefcaee5. 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/14052104-0305-41aa-9b90-7641f05ff440.json and https://artists.proofprofile.net/proofs/artist/14052104-0305-41aa-9b90-7641f05ff440.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Don't Know Much (All I Need To Know: Classical Version)
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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 0x38fa29066cf6e3710218bdf7f39058f755a58b1392e59273c4db59d85af79130. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZPJ32358194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221af953e414be533ecf6dc4cc864e42d3021c1209f97b86c4e0a970a83c9877. 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/QZPJ32358199.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ae8a3cc81181502f9bcb761bc061155e26271476fa0a6d493b771cebc994c2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZPJ32376600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bb54bdeacee30997cf4dc2cbc351f7ed139fe3fe8308027a6ffcb95735bb5a. 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/QZPJ32376601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd6a15bac410c5ea9981dd80a498ba33286b973fe3efe5b7fc42061aa2505a7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZPJ32449142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eb31a36824c01d8dde506a182c8d29844d37fbec60bd6bc4b9445154436796. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZPJ32370858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5090e386781e72f1bb28b5104eac676e303dbee8c498b1c098eecb87f796ce. 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/QZPJ32370859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45963bb6181a90476afe048ce775f6625029e2dff048baf102974edcca6e2c81. 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/QZPJ32370860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52ac430277d6291628c1d2a648fda45d98894f01ea0b7df364e973b83df37df. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZPJ32377910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16606f2410397107d109fdef343a887fee3a0cc465aef534028c360eb237eab. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZPJ32377913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80a9cb484b9f9baed29066676805f69f03050ce862a0bc0837ef53545094e97. 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/QZPJ32377911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a033d855fda3e054a830c80ab9e8e65dec3bf514d1e706e4b8903cbdbed7fe8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZPJ32377914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c489334a0657fcc163e757849b153150c36bc0f44c11be6f57e09673679dfe. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZPJ32377912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735f4ce8ab6f35d906b71e2ca1dc7cbb231057fb43134407d2c7153b5519096a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZPJ32377915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03db24265f9544f8f69a381ed8a9e3309541c37588a87663fb18647f24645cec. 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/QZPJ32376824.