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 0x63a3d8dad64f1bd2ba72c35827ca6be69a32ac59f46a5bb86f11804dea63d4f2. 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/ea212fb3-4d3b-49ee-bd59-e0c0ee270638.json and https://artists.proofprofile.net/proofs/artist/ea212fb3-4d3b-49ee-bd59-e0c0ee270638.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 0xca96cce69fc351667fea7933803045e48a7708e21460e774c8767feed0e5393f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFL2100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aafeeeb2120b1632f537998fc995ba5632362584e147374f7645cb885a2e2f0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFQ2169389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a10992a0b89403e4156a518d367dcc5e2b27f1e9e1bd6fd97fc3ef1c4415ad. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAGH2238902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aee264352c62aa5e77eeb98f7dbe2fa492a1abd1d4090d18c0c8f99bed1652. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAGS2237898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb589d4bc98f024a6122d8a255865715b4ced7de465d08f515b6056eb502db15. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:20Z), 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/TCAHH2337125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89090c084367d5b1d0525473de9a77acc528196610a83774deeb5528e33868e4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTVM2377727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042f436c7c5078b0d23ea67b15ca5410950fa41c6e8afa661edbf2f57962b3c. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAHQ2348695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e481b8809babf08466767d927e1134c1fb2d1484de6774a85341bb9340151. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHU2484922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53eea8808bd54efd3cc31d807d5d3c47b8e64c0569a5fc1237a434a4ed3861ae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIE2401847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d1f83a8d030b34938785a4330d2978f5a28a58241f0c9ab49afca38fd0e3bd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:56:41Z), 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/QZQAY2572210.