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 0x0e68db3da71a34668e9034b886fde0e616f9db3364f85c0553711a1c1a4b3ab7. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a31ffe1c-3e30-4f8d-bf8c-6409e5d66713.json and https://artists.proofprofile.net/proofs/artist/a31ffe1c-3e30-4f8d-bf8c-6409e5d66713.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 0x48cd00ea63d15c0d0d6c39701cd1f12364355bd35c9bcae00ad99cacd7932125. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:05:57Z), 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/FR6V80231660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d7d2b6f7d3362ed9b8cee6bf257502e24b6a7a6124a7734ccad47f1f1691ad. 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/FR6V80231662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852f2ebbbff5127dba1222e661d914daebb8837d86353013c59500904c52c4f5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBMA22144114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0752a0d05be09767d301e43ef37ad5ce02a466ce1dfbb1cf1cfa2ea6222d9f63. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX53U2084161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16630b748f174b4be2f6b09d8a5878ea639ee2b975689bbed30d0e37791229be. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:59Z), 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/GX53U2084166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdee52eb673a2489c053a4d852ecea9e09775b3d744697dbb6c2a997dc2ce7b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GX53U2084164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeaa6e71e95fde404beb4a6bea4585b6e6f4a95831f4d2076d0cc480b85e68e. 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/GX3Q92388290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b4656869e9a2c55128f4692862b7e340237f2da161adfb84f84a6cbf31e157. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP2396343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0bbd35f4c4ac688f7c51037ebc4813f61248a3354da57d66934c91217823b9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXF9Q2447598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea8cf7c73fc1b6b90b55b188acfd28f3483c58132c342e10fca34b02b7593d9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:07:31Z), 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/GX3Q92576461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5033c8c8e79e591e7bde299c704756aeba261528664397095be16148156018. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P1212147.