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 0xaf6c2618a77cfefeca45ea0f3a48e095df2d70bae9cf2462aef174eab62e2da8. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4f6fd6a-5405-4f86-a470-02d04939faaf.json and https://artists.proofprofile.net/proofs/artist/b4f6fd6a-5405-4f86-a470-02d04939faaf.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 0xd50be7ea7e5d2bda846a32a7147fd38ef49ac9dc3cda6ad4646a50c4f535a12e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM11501350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc8a8fb7ac9403fe0c7039ad1e43ec6a46a8b9b20653ff9320e9f3f90920965. 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/USSM11501356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978bb6a5cc7e3b413070954b8156f4752c2252feb3979f86867929fa56f54a4d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM11501355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601a378abace5937245199e7120366f50e477c860e21c0f5831cf7e80e5b99ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM11501357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56061d46767ab74fe013433f7386f5afb7b0d8b8beb01a69472a2aba8913eb01. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USSM11501354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1d1a008046d22e69d7af1a4a91c66cbe71fd16c80c7276ce6eda0e25b683b3. 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/USSM11501348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb622d2ffaeecb301d543a9fa384a1b13fb9caca6bc3107369aeab32812be349. 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/USA560803222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d12d6f28683ecfc139866fc9ca9b126aa2bb9e4c76839477f14d9eb9fb383c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USA560803223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af841c6319b03692106ade3a763a90c148dea2723612278780d9e8bfaa94e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA560803224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5f12fd39253f12350532c8d5fbff846b473bb519e83725fe4831e23fa8a0ee. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA560803225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6badd9531e750d9882f434e39f15fd3e934b796f5a725895364117181e4361de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA560803226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8561ceeeb8d9fdae18ee993bdd1f689d43e00e5347fc962b1001b97d95419165. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USA560803227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d736498274aabbdf69e3d3d2fbb779722014c34e960a27a955aea8dbdd6c7a. 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/USA560803228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5024b69377e65a0c922ea8f66cc2e03a08ba3339fe4fdbd0cee55593cf3979b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA560803229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63363efb2bf3db09336df35f927a19dcec933db97011e00788bebd30506aecb. 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/USA560803230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc76e7cb19ada7ffbe22a3d72c43e85a46116c3da773ed514124023f5517af8. 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/USA560803231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71159bace16af5d77c7719853b4ead72a849b5fa5dd9da420fcf71204a915dac. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA560803232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153eacdcc604250be9a037c319dd68fc690ea029328f8ce4137a0ef715dcfb0b. 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/USA560803234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d6ed25d03934be8d540503d43dc327bbacc51267292d870d1d9da9c799f2ed. 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/USA560803236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c08194e8468ee4aa957b0185d343d113bcf5382eda76c660179d4e8fdc54312. 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/USA560803237.