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 0x40c0dc4c3584f7de9c113375f463781cf0bfbaa7aac47c6ce9db70e5be400fda. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f9515ae-5f95-40fd-b800-1407ae16128c.json and https://artists.proofprofile.net/proofs/artist/9f9515ae-5f95-40fd-b800-1407ae16128c.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 0x925606480532a923153d51cbc89ef6c245c683864a29003287adac1645445e16. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/PYC842421319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27908e067fe62a1e81e866acff02998bf98d30e6421c44b6322b4d295516d6fb. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:37:53Z), 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/PYC842421326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b917a421a053d23c71e7167e0fa9ce1613821e6a7288c03123e51154430241b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PYC842421322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f1c5a6d2eebe3a405e67e6d59c24e361128e701886d123dd869b790169bd1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:59Z), 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/PYC842421320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21904e79810608eddd8b3848b70f9f66ea09f87fd02cd4948f28fd6ee466133. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:51Z), 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/PYC842421314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e9a60c70eca8c642a12c092477b06fb38bfe360ab0da69ff3a9f3d86bb157e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:01:45Z), 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/PYC842421315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce3fb7e809772f8dc76857a181603ced821c9733a53d50f0f63eed67ff15700. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:03:29Z), 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/PYC842421318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebefffa9124ddb90020b1a2766940889dd8fcde0f13ffefd50e3ba2f1c3797aa. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:36:12Z), 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/PYC842421321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5e3dfe6f27015d7310ac6e9023001d39772d94a5c76da7bb53c62fa614e764. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:01:55Z), 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/PYC842421317.