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 0xd75fa417a08d2009e2be15a210797f46540fc23f0b9e1f6be277931f8be2d188. 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/34c746b5-a3db-4515-8d2a-acf3b347901f.json and https://artists.proofprofile.net/proofs/artist/34c746b5-a3db-4515-8d2a-acf3b347901f.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 0x90d1a8a5fc99e9d9d3b5eaa8cc100ec834654b57cbe444781cb82a610b775f27. 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/QZES91971636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5909b7035e60aaba7928ecb9501c0d1cf6bbf4db8b7758bdb4217e5ac80d2f5. 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/GBKPL2081738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f8e94e363b0c29617348f50aa96281deb8a8b75213152984cac6a5fcc28cd8. 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/GBKPL2011393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4260a0f4522f6c5e1953d0cd752784ab5b2b6e9df5bfe35ac31b936b71822a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZDA82291046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e333449d2d2a5c4541eeee2b58f6f78876b2383a3434596cad0a5071dc3d9d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZMEQ2227490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf92013ba3d12dd9c0ffb753e3dc5e5557fea1eca3014deb6fa6fdc6084895aa. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZNWT2243728.
If You Could Feel My Love (Thanks, A Million)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575dbf632c70a65f968ff14d9b894f5f766f45095fb12d7f3be9e0a442d2212e. 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/QZDA72486772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1540c8ceaea3d949ee91ad933fbc0d47f74af0e4c4da526d083f38eb6d9cbf8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPEW2430523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88d67dffede3d519e93564d80c0499f0c4fc87e2fec54f75e6c6f6809fb3fe9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPEW2497877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72de0005180c857f868e0d6e0f28e4cd8603f50bc0b8c24a522fdea200d1e8b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZMEM2357482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f774866c39763a53afd08e3759765169bf4acba5b2b4d569751a33e0d391b3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZPEW2497878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d78ee2ce0f427b5d5704b07b7971212870e0e00b47ccb814ac52152a8ad65a2. 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/QZFYZ2343564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8a1cc36473a03d5c86c4d57ec962debcae60e21f962c4a997aa052f7c244c2. 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/QT4K42532833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabe2ba11a0b0534cfdd2c35385b178aca440ca3146f03d31af6e6fdbf00728b. 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/QT4K42592719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd64169393ca8898e195bb15c6ffbfd2e3db79b637f57e3c33cd28c16bd3cc3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT4K52548931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd65c1efa719cd46b84406bd7cf796a01f36e84b4c47657a665cfb3ab93482. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZPEW2542078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c8626f59f0186a541aada0545d99f9a9a8bc4d4d1f0975f149bc86af0523db. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBKPL1965879.