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 0x849a340308c00799e557affef42fed94a8e08e47403169cb6829412410fbdb20. 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/2231df69-d791-4231-8935-49b1daab35ae.json and https://artists.proofprofile.net/proofs/artist/2231df69-d791-4231-8935-49b1daab35ae.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 0x5d19ceeb825c6a914412284684bac142ef2cf8de5af2b24cee50f81b7bfa865b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IL2X41855690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067eab70f38490031ae2a35c267a880e551ba191a5fa04004bf9788873358d04. 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/IL2X41895283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bc6e41e80548855f20a9be1623394f967cff15fe746b5ede88f9e8624cf0ae. 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/IL4431801388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ca8aa17049250c4951b2652a3049d609a999a1dcac66f2cc3ea58983c240. 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/IL1011902450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7df5c536602534c647ad34abc919ad19dbd36ae15e63fe0e28bb61fc6063c64. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/IL1011902548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cb869857c7e378305a157d826683dc4dc144e256a67f0c2a90974caee375db. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/IL1012000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c2db039a6753e88fdde823a56bb59a2ccad61e2dc6e28d8be4c1607b0835ea. 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/IL1012000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64658917a79effdab4f74d00d2460b617410ed74113932566069bf5ccc24bd3b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IL1012000367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd8b2fb54266209cee22d3ab96245c30b98c16939954ca93898e13a5646ba90. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/IL1012000438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972ba77464bc37cf3de7f802a13b927ef3e220fab2fd5481aec634f9be22f669. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/IL1012100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf3f08fd9c367b239243715222a31ed271a9f491b350b28aaa7c297403e3268. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IL1012100963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7534d4a878523de100f14ec49f0b4c3da6d9641422d76ae3b14f093efe77d20c. 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/IL1012200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5c50068c8b31603645d74cf7e8a7117dac5ca94679c4ad5fdf02fb027026a9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/IL1012200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28ca8aa17049250c4951b2652a3049d609a999a1dcac66f2cc3ea58983c240. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/IL1011902450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fba7277e60d24294bfc0635e549b880d6d62b75f7770a917a6208fce2b51de. 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/IL1012000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0681020d758ede738b84bfb55abca2e78206632f154821b72882891d9ff0305. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/IL1012200898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566fe55dd2fd16402a324ef7ccf093f7e1b20431a02e706e385e65a332605dc5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IL1012201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673dde25519d83b2605018ca4eef41647580ea1f1226bd323a74050dfb2d96d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/IL1012201222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd96eff0e4de7963db4a6d569cfca3d97c6c7e4737010b18bf682a980d5cc30. 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/IL1012201412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf4c6627fb6fab45c7910fde7d097a8b34b22c723b66a2af86b780f7c4bff0d. 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/IL1012300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0194cf2f965266f99a0d13f9bf75c8ad0b5d0942843fbf03ba7b9e417ab87e15. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/IL1012300769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b51bf6d238c174d14e28d238cd0d67ba758724b8243391a5fcf50d802607a3a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IL1012300770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30358b56a269d9dd9d34c046d7a47f0755f9599278342629df21b6e595f0d9a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/IL1012300772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c766462e703749a90246f6fe0159d894863be610f0f7da1e8c4313bb82d75f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IL1012300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1a71591efcdf881bab02c9b710582541579e96b48ee04404c8c4d6e4ed1470. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/IL1012301131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea88794d9cbbe3c3fdf6b9be40c96858d4fc1ed0d78e90a54ae88866650d9f1f. 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/IL1012301687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c725ce579d86c84a194827e2445c4c3c102aaddef5b4d4c522eca0010a4988f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IL1012400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45048abbb3986af541c09bc970b5ec9c7ade11083482f858f44eeead6b7eb438. 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/IL1012400743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0080e97afeaff053592129866e95fb1ece6ab33a684bce13d54fa3e5c9f51e9. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/IL1012400759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d799d9fb892ee930806acfc15575f8372be0f555b8db780ed9503bac9ea142c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IL1012401644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f3af0345b3ee2a664bbbfc3939d4afac5a7be49da07385a96f851828600122. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/IL1012402242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080ff403fe672bbc0b08b383bd46c1863ca5bb9b0416cd0aa06020ea27ef310a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IL1012402502.