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 0xa5be7b378f0c4b9011683e335c3e42cefa689c144b177f86064fead7aa85148c. 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/a4782671-d3f3-469e-b5bf-b95f7ce16fb6.json and https://artists.proofprofile.net/proofs/artist/a4782671-d3f3-469e-b5bf-b95f7ce16fb6.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 0xe37f6422495d3c9dbf174ff2b9f54ee1b818cc2124e5ef1aeac83ecd4433abd2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP52336579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc368ae01567fc47810c75dc4353b5132a205ba7f6a1b7a33f1c821b1ceed98. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZRP52336580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf067d9a05845d576e4930cb7d8467b3a11f9cacc47e779fe94733481a72e34b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TX1746333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d1348a3b06037f4057d5992e993f230af05c5ed95524d04412cbe3e4eab6ce. 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/QM4TX1746339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0338570fe1ebf2f7238b3bb102c3bd8d5d78b2c31f4f079e1e044721b56788. 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/QZTAS2159876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e05e64ca17395d1d306aabf423dc8344cf3cc5c3ff76e2f777009ed16f10420. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:55Z), 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/QZTAS2159884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce328d1b23a2febed8b1d1882eb9939d32c3621d8345a93f4c78fc88d87a74f5. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZTAS2159885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e70fa450c3ae6fbf00218f7a4aa72113cc5975517ba910d77721c546589c86e. 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/GBMJG1916263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd12d25ad9542817dc6e914366bf80f1c5c0c4f7a52ce3b352ddc3684ecc05. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:14Z), 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/QZES82195499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e91f833a5749ae3c3980950ef485da1092bfa152e31cd02dedd53c819126edb. 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/QZES82195500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343285944ea6da199ed690144032ae134dcbbf2cd6757a467892645a8d81dcb. 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/QZES82195502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb2488905ba9ddc8e88ea23901b2b404253b3ecb49c570fe9ed8bd8cef026b7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES82195505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d2644cc73f31677c3d6e78a1d04e2d9c18ae4dc968392c7c848dab8c63eae. 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/QZMEP2440343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271a2590f49e0bd790a58c2802c01ed6b6d3a529173a653eeed8400474ba7fb9. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZMER2437934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac34412a14d27a504787185a414cc1805b66d14adb6ccc54263acc2b6b514a98. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6M2443431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d2644cc73f31677c3d6e78a1d04e2d9c18ae4dc968392c7c848dab8c63eae. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEP2440343.