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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4eb853ee29583b7361de784471867a011d00ca82c94deb84facdd4619115668. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a0f8942-5a4c-4471-8ccc-5348c286a464.json and https://artists.proofprofile.net/proofs/artist/7a0f8942-5a4c-4471-8ccc-5348c286a464.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5553ede8e0a789539a3cb7e19c33d081df5e50bae68b1a1768f2933d8f1f209. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DELJ81954982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ab72f135297c1d1f009e76b6120395411c103b62ee258a509f25d08b08e8b. 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/DELJ81213972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca7e166cfd2a0afdab3a71b656ed1db5a66b5b4229fc6c837f817011e47d9fd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DELJ81213975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bfbd7dd7c89b7e78a2b5bf3bb6765d1df5b931413d0c601be6db1d26bae594. 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/DELJ81213983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3efbe22faec1a3fa641cd24e195d0b1e94d086583f90b2d90516c896e50e483. 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/DELJ81213984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7f78859e553110ac00717c240a8f94a5b840d2e05308cf78c36bfffc234692. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DELJ81824801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba3e2d8ca55a68fc1ec8db74fcff7f3b6c4b3bbc061fd2850e6003115a725af. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DELJ81824813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2a44451e88f02c6d0e4df4a484716153898cdaf411e3003b117869cde83a0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DELJ81824814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084ceaf0b4c55ed7828c735e69f92d6b09c88372a2ca14579a730cf7ba12440d. 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/DEMN91400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7cd5d4b8dc3ddc749b4745940392343beb6d80ccb3535d9c3562a56b95c54d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEMN91400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33aa4d0aeda60201b61ab5ecaab315bc3b055ca7ed07b253b5ee9a8072acfdc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEMN91400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e59d84984c1c6d114ce893b93ed08b3201eaa6fb1ea72390bbdcca3d48c4f4f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEMN91400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57e1e9e6b1a7691809a2d76af8c67a69479f9d9ee78838a1dd798aba01b4914. 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/DEMN91400281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4827906e14cc43fae0b914fb4e7de806c9ce330150ff4ee4e3c4108e90270b8e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEMN91400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431c33960b711e823d05b5435b33186c1422d1deccb60117816c2770346a0f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEMN91400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1deeb4f9063df569312a0c9a9392c01f532150e66a7060dab155d643461478a8. 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/DEMN91400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95777bd37caa52e234953452d4b7c0581f61d301588513a01f957a5b0281a0b. 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/DEMN91400291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1bfe1246ddcc8b3caeacb9d1cde9a8f5c6f8cbbdb77de25cb86f62b148e776. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEMN91400286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3381bb1e77d82951e7afdc6bad24770674d7a2b08de231cd037195ef3908cd3d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEMN91400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dcf7f1d42e1391d6b7c209efcb5c2ded9301d9947dbb84e64cb37120584ce2. 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/DEMN91400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016d95e5b4994d2af14b857f1a2e2aefb1557c498ad488f88610e2512bcd08d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEMN91400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a30f0724722724fb893d574531f60ced2f273d7672b899e580ce1f5e371473. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEMN91400293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b6357351983492d934cd6147f62fd95609a916d7fc4e9b7b56eb44c4c8e7b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DELJ81972783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30e79e4594f352fdfc618fedf787e0dad6b246be02286d9b95e95449924c50f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DELJ81972790.