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 0x17d69c16c337ee8908572858ba466bec0066f02df60af368f5d5dbf5e0c78f61. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2b2f37f-7f65-4a6e-aca5-a41bf7daee1c.json and https://artists.proofprofile.net/proofs/artist/d2b2f37f-7f65-4a6e-aca5-a41bf7daee1c.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 0x9fc0fdda41d30520afb26542d1ba9d0275600be8a5ed0676b602bb5e539cdd67. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBLFP2502540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82600f73f43cd187829af51282f186eb94ca71b446673ea45e8961c5f3779922. 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/GBLFP2502542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9861f4a660d3c5121fe98bdd29288c6f12a5265b0c1ca14bcd01bf283946246f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBLFP2502543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada5147017da270053907689f52190805547c5b267ed9a60bae711f562a8f767. 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/GBLFP2502545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df93c5370368189a4748bd214ad7a86c864d9421f15cd941091bb90c8945aeb. 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/GBLFP2502546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff47d92ccc0c72277067f0f2839b1cb4f1530900d7a54d2263ebd5882ecf887a. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/GBLFP2502547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa072bd0adf062fd3c07da91a902f103ec3e9224603ba3ca95a7a2938a30a4d89. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:51:53Z), 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/GBLFP2502548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8968330d2106c7413ae6fe4d9549e02235f97b22dca75af8450b8e686d80ec5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLFP2502549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659d5c1e4727e2d1c56193532f43a7affe01dc2faf46c24005f9b4822b72fbbd. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBLFP2502553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc513bb885ecda484503eeee6593b048f536215c8e6bfa3f74e6ba3608188bfe5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:43Z), 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/GBLFP2502554.