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 0xfe1b15a34db02ee164bfc8ecca696b5d48017ff7c21c7921d9ed59cf3b411c9b. 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/dd26e975-bcb3-4c22-9b4c-e9bd6c88a8c7.json and https://artists.proofprofile.net/proofs/artist/dd26e975-bcb3-4c22-9b4c-e9bd6c88a8c7.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 0xa7e672c07b8957976651b4a6eab499a0b0c10a86cab04c6c900b627f3ce96d5d. 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/JPB602401171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7b34299434b95637041027bd78ebee9d0ee03395852e1160c26366658b0912. 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/JPB602401170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae728f5b90df6414600250d73cf4795cd70dcb2588a986dd27ca055e077fa3b. 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/JPB602401172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a33e26b049d85997d67f8f79cbfa339fd61c5311a45114d9535a00a67a7769. 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/JP92N2359531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729054b961cecabb79b680e1c3d789a3fcaace21435fb2b4103b6a2013115c1f. 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/JP92N2377593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc637f32508be3108d676459939845d8b394cb9c8dff4e6aa72bc5f262fd91af0. 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/JPB602401169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e672c07b8957976651b4a6eab499a0b0c10a86cab04c6c900b627f3ce96d5d. 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/JPB602401171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7b34299434b95637041027bd78ebee9d0ee03395852e1160c26366658b0912. 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/JPB602401170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729054b961cecabb79b680e1c3d789a3fcaace21435fb2b4103b6a2013115c1f. 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/JP92N2377593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a33e26b049d85997d67f8f79cbfa339fd61c5311a45114d9535a00a67a7769. 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/JP92N2359531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f6fbca3d66fa761307a12ef8dbcd7a68b26c0c9af4e69cb645e559c8bba347. 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/JPF552300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f191b902eadfc49653b3f1ab6ef1822569ea35e43fbafcef854471a7fb07b8. 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/JPM792200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b04464a0b271128024bf621fe5e14ccc462dacf1f02cf24aaf32872b0559ce3. 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/JPF552300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359803307be225b05b8db608ad0414f48bd29875a7424d16864e5e4636c2f3de. 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/JPM792200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b73a871534974bcf54fabce44e34309711fe10499801453ac70fd0dd1dc7ef. 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/JPF552300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f6fbca3d66fa761307a12ef8dbcd7a68b26c0c9af4e69cb645e559c8bba347. 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/JPF552300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359803307be225b05b8db608ad0414f48bd29875a7424d16864e5e4636c2f3de. 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/JPM792200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26310ad9810b77501c306ef98ca937fe27fc638335c47a4db02ea9258512ef68. 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/JPM792200244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f191b902eadfc49653b3f1ab6ef1822569ea35e43fbafcef854471a7fb07b8. 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/JPM792200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb913af0b094899232241cfd342a3777eff9342db77e0367b8603496141add4. 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/TCJPQ2111903.