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 0xe10153d35aa90912ccaa1ad1cd27c62c2530a21c175e63323838a0644c97a28d. 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/d0c94e0f-4083-4330-b279-9e49cc11258e.json and https://artists.proofprofile.net/proofs/artist/d0c94e0f-4083-4330-b279-9e49cc11258e.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 0xe11681ff329e01dfa36db8b09b5f0212e8d8c1602e7e2bace71cf8b136540f46. 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/GBWUL2114803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979698318b0ad38d3f9455bdda5c629636eb8f5a5535bc6762e5a4779f31298f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:52:10Z), 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/QZ5FN2266920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe185cad7d7215a5c9549bc2868cb8710a5879a39406a1b63941f6347f9ba4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTRX2284037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4c6659a2a27364e8b06c326b1f59cede9fd8603fc25ae2f354e080cba33cd6. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTV32250947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5582c8a276455ba001b1acf78d12897e7eed2105d8f44853ac5a2dcd2dec50a. 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/GBWUL2336140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6443967f4d9952fe1b2b20684031fce42b8d2c1c299afa985a68f95bacc06287. 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/QZTRX2474924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9991c176b02ac47b4b170c2421619f0728fcdb48118808745ff7340a726d1538. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZZ8A2425953.
Dangerous (with Busy Signal & The Movement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bc0cf3597d6b66e6533466397c31bce47cc020335b2ab4c2b641fa0da2f05d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWV32410166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbbb62c6ef694968d7faf53548bf3a339bf6333c0abe6b106581fdf4ce77e76. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBWUL2596910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209ccdb11a981f1c8d694a23ff7c458399c611028fab0d0e8c7b4fa412e65504. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USLZJ2532965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3632111dda764816901950bd4a37986fa0de95fc3dcb8639fe2f59c5540db8. 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/GBWUL2596988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e7d329e9728a9771c3d641d10f7c28f66869a3f93d1779d3c500937198e53. 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/QMDA62181177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5582c8a276455ba001b1acf78d12897e7eed2105d8f44853ac5a2dcd2dec50a. 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/GBWUL2336140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a14f3646563d5231bdff67e4a2c614045a3a255c50d80893da0eb4a4d1e3b. 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/USHM22298730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a14f3646563d5231bdff67e4a2c614045a3a255c50d80893da0eb4a4d1e3b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM22298730.