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 0x71273720ecd44ee9e21913a16c44838dae84f14e3ed904755b499f96a2a1a981. 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/2b68c70d-3d2e-4045-922c-66e39b46ca8a.json and https://artists.proofprofile.net/proofs/artist/2b68c70d-3d2e-4045-922c-66e39b46ca8a.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 0xed996ea45de790a6084f809c0b8846cbcdc06ef6fa6263a699625e5f456a526c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ITG271000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a7dcaf31dcf0bf97a4e5d2b6f406b6ce37dd114ab39f7aeec9baca7dc9fe71. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/ITG271000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb6c66b4f724cd29cb0960f10c687c299160b42605b325522f1774e5c0381a9. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ITG271000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077c47ba6f38ee3350c3f71262dd31a48c52084334253f127d442d6be57ffc19. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ITG271600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cd8d4b33d82789bc0d053911546ebf40165251f47517d06f54f710b190a6e5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITG271600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa037d193bf73a56f8b3b99ebf117d54f61c3c9ba7bb0b4fecd17fe9ed92b35. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ITG271600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a45965c5b70485006e18b05b0ed3219010adeeebaeb80278aad61f19eefe03. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITG271600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1b940863cc247cdce2f50739aaaee58a34b627a1db51309e37aad37c3f5b96. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ITG271600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51c6868093a159cff40a3ffc7b68ec741d5892540ea47de3efe224750a9fa4f. 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/ITG271600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd26189d340f28410a71050206afabb53a69037f8d99afcc4faaf35f8457801a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITG271600050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0563ecd1888a0ba02591d15dbb358b3d599e30c2b539ad0af445ed28518f84b3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ITG271900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad800e1bf1ccc79781ae3732059773ba6d6d43fba0411d9eac1c23d5fb21a0a7. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/ITG272200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899eb519a514930bc6c25f32b7cfc3006c40c652c43a9f42667b98bceadbe5eb. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/ITG272300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799adb389f8f27bc6d69b9a576c81eb4e7712fbe907fad5d0f5146ff314cdf85. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ITG272300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6874aae8d0a0a3ebae21946928c7d6838ff432ba81306c70fc75604ca6da5253. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ITG272300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8adb99e0584c17a497a5ee99ab1119131c34f8b094a685f4fbb4356b1643721. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ITG272300129.