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 0x1718af80022690ad74dc2140ddc446de7021e0f444d58bfe42b0780928e19a9d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cae8993-0155-4d81-8920-0c6ee4ff77d6.json and https://artists.proofprofile.net/proofs/artist/4cae8993-0155-4d81-8920-0c6ee4ff77d6.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 0x5663f042097c4d634ed974d5466eb357d0d1d677270f0b5ed75866a7d2da2c6b. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SE64G2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e22d5725534e00c50a9e346b904fbcb352dbe141a826ac01c6e0c71730f2b3c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:29:24Z), 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/SE64G2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d76aa04d0f175c4371f298ebd537b91441099dff79b13e84f54b1e364fbb1db. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE64G2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9f53d9ab69ff007f2943b76e1ede45fd19e38174ad466a5c8872f519e0d580. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SE64G2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6ea7d4a3ee6d7a0154464e6c1d5bf21f9ef2ba399682fd6a134b57afd89548. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:51:04Z), 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/SE64G2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0f31744e9df0efab68653e19f04057fe98d21c00f86e782f282ca77f2e9ce. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:47:16Z), 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/SE64G2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6568932556817bc0c560a917509633933e79b23318e13c99f52f93e252dcc. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/SE64G2200109.