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 0x9dee5d9c4f5300a7482deba27093b7b2ae7a1d9ed985bde36b9aaea4e9c1b1af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5eb99d9f-a567-4fc9-9059-a987f3ecfea3.json and https://artists.proofprofile.net/proofs/artist/5eb99d9f-a567-4fc9-9059-a987f3ecfea3.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 0xee6de0269c8698324ad8b7a53a8324b4570f16998d6b58a5008526a556d5a890. 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/DGA0L2359743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b03e12ab37ad2c8da3500a15f438863f8ac48d412de75f5a1ea32508e0aadb5. 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/DGA0L2359748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b4226e6ea2972dd8d9961f9b4966f04442b07ce1fd5a0f8c2d3fb7289d088. 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/BRRLI1000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03305fd578f56fd9b1d33d8ceacbd2407b54468151e21ac128b88a61c8a73819. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRRL11300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7b78dc80186077ff7658e2f1d54eb26fadbace14beeb8263f71de8cfe47370. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/BRRL11300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b819a44161e32b73215e166c8ffd62b48cf0959a5b447aacefbc21b704f850. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/BRRL11300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6beb954e9d19a2957209034b10a4540b2b80cbd4f4fea3c9c29dad48a6a259f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:32:07Z), 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/BRRL11300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a94fa04711c4c53d4acbce8b7234356a8445687b37eadb6ef18e154d230cd7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRRL11300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812fe3f8b63094f0bb30402d1f387c677afa5be1e52f4ac8d6b225229eb5d9ec. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BRRL11300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1ab593666b42eeaa824521caa131b3f8fe6b6f25c87c65a6efae3c5d18f47c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:07Z), 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/DGA0P2313947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df05e87acfeb8d6f71e8b8fd838fc9a5a1949f7b1a20ee0b06ad0976045eb6d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DGA0P2313948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe4c846a246837b912162d895391a4a9a64bfcbcd0cc2fadc40484a5a5b2e94. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA0P2313950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3247d6ee32431b515d867f1a8df8d2606dbb15f7f4ed2ad5297560b4d52cf926. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ5AB1974977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef1839ca3db6e0d1971f14c68311426e582345ca4c6628b13516bc4180066db. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA0P2313942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b618e2cd1480922b9b172f75664b8628ffe61295ebe48a8e373ece66483dca8. 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/DGA082456915.