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 0x5da6f94911a7439aa647cd92cae25e233d6002adb1586fdf33d55cf9bad1bb33. 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/2b76f3cf-c6e8-4b79-b6f3-8b3edd67ffac.json and https://artists.proofprofile.net/proofs/artist/2b76f3cf-c6e8-4b79-b6f3-8b3edd67ffac.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 0x4e4ffb7b06ece4794b9ca7900d5c913264729be372e23619a7494ca58ad31b17. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM4DW1591742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa20c82307ba77de12e26958c705a59b760402aafe6384220e854a1d070aae8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4DW1591743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8684c156db288702442b082ac312089fdd70b44550f32ffe8fa2a1f64b28b49. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZ9Y21700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ce1d76f3c30b5020a49da40707fb9870ff69c24ae1b31d28a75bb8d974a59. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ9Y21700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cad1328487130afcfe45599be60984aeb681ca82d4c1cbb422f4a929269f45. 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/QZK6H2058646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9faaab3748e1441c660574bc9f5d30920d6ed5bf66b4dcb6ce5071679e7dc. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZHN92489675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39e027451410fb74995a33d814efd8545ebe7b3eb1a8af00dbefe7a5ce14bd6. 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/QZHNC2431299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7d4a4fb52faa6765e32add3a267f00a7c4a4b7306cd94062390306ee932186. 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/QZK6P2433441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aa4040c35af43bffff849261e8c50a810faaa7946eb17520accb0f48021e54. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6K2486028.
last night i dreamed of you again (acoustic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc0987c767c9e679a8b4032323ed690b2eb2f0a4f928f9660af894c61d5191. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZNWW2479921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12731937cf713e3041965b22517d34f7a58b2f3fa27aa665da6906af61154c88. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZWFX2415016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758ce66969cb3bd5299ab819b39026dc6cc1588db220fed25378c9097c20fbf. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ7M2463841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d280a5ba8ab709253a30fa35ac533119dde2148598734158e95de234d0fb4d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZZ7T2462807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e7f04f2e2c9f3320f5e33d75bdd62ca2c2d811b20bfa0d7ffc9f96dce7908d. 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/QZBRF1863370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d770a8c84635cce1b1e2879550e1f3bb27b1da314c41b28bfe0ff7e9791e4a. 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/QZBRF1863373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870118b034608adb10ef9ed22c7ea8e1369f289a64e7d1726e6c6ada0d816b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZBRF1863379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb74e17210c134bc5ab3ca7a491246afb782fbe0b28e70c8c9ebe36965bbcc7. 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/TCACR1667001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc462a0b8d523f53ce261e0a1423a1ea7d1d4196bf8e83c89d91c424d1ae5c66f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCACR1667737.