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 0xcb080dc350d52951a6916f5bc189b9f820baf8ed96c6db8850e50e469e2e5d8f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7efc5735-915a-4310-b5c8-fb85298d360c.json and https://artists.proofprofile.net/proofs/artist/7efc5735-915a-4310-b5c8-fb85298d360c.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 0x0c6e955639e224d80a74a2b49644e6e5a1a5c362b458d4a20acca9849fd39444. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:09Z), 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/CAD431605901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9758d0ef553193031622534d0918ec8acf9e28280cb85e099024e489cdfed4e3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CAD431605903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ae7a208743c6a3c61cb97c54e8a46b84c11b5c48ebafbc33638843c44bada. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAD431605904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1530408c877c78e1c4c81fe2903f786f6b9bcdd88735ac21310bb0dd8df09866. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAD431605905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f51401a1b4088bd2f330d2ea240d6d00dc258928a6c035e0ea073c567e78d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAD431908101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a73a6a2107ca5c3d09a6737f9fccb8141fb0f7e5805ffa4f27da24d3d8ee6a. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:14Z), 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/DGA052440380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d58a07ff18e4c6f0bf2f281ed54f97c2f49fca8e494bf376f6bc1f76a32939c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R2442291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d3f133041a1dbf6e7bd97b2d309c9c31641b757cccf50624757152c686530. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA052440382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f20117eb2ea2bc129db5997f8f2d6103e1d4b0ea3913354c86684651fe1ff1. 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/CA5KR2131913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f974178503b4691ab47e9bd90fa7162d8a81448020ac1596b679ab6d5e1ec18. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAM372300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f974178503b4691ab47e9bd90fa7162d8a81448020ac1596b679ab6d5e1ec18. 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/CAM372300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff56746017058ecbd8636ade4c0bbe3f98c349c95962b7e6e011170aec0eec. 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/CAM372100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff56746017058ecbd8636ade4c0bbe3f98c349c95962b7e6e011170aec0eec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CAM372100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fbb777413e6fd382ebdcb6fe0444feea65fa9c2feedf47133078973b33f3d5. 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/CA5KR2017134.