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 0xf8a3cea04046731d63e49ae9a44727d2e78596435dad5b2b7be8ec4cd049c799. 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/306b69cb-63ea-4eab-9913-86b2a760e0ad.json and https://artists.proofprofile.net/proofs/artist/306b69cb-63ea-4eab-9913-86b2a760e0ad.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 0x97d015d75eebcd31e75cfdd42a34994ce68490e4223166c61b83dac129199de0. 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/FRX201632527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0d7c5507409581b753df66e0cbdce70246ee4ddce6dc9d1a022b9525f65aed. 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/FRX201632528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305a2ad7e122a4ca7ba7e57e944f8296cea034ce71c6036ed03af531ae0872ac. 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/FRX201632529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c364c219ae8ce59fd597c6750cbd7ea6f9139004596a5e4541edd139b0f5e0. 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/FRX201632530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e43ec81b2ba9f89d7640631c54d7d85862b9201c6ca52b8ea7d788a4b5f594. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FRX201632531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66856c8e7f210babc675e8463232f06a5421678a89fbd4fc499d3233fac0efb. 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/FRX201632532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3804a2e0660d9f9de0638fa17bbdbc08dfb145c473c20c267ffa54b30f978b. 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/FRX201632533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8100341f08a6d7019d17d5d4400dcefd140a351c019c6f4f32ee4e549d3e8b8. 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/FRX201632534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd4f8ab5261e72d93aea338022d00ebb1f04b58d5a35d1324e9cd5b5c63fbf5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX201632535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41bd021f6626277d8c8933089d704d191ae3ea38bf848e79ec4aa8b1a26d261. 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/FRX201632536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280fcc138cdf35f387feb4c57fba727674c90a75716d56f862a6e5bc3bd2b011. 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/QMWZB1502017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f60a098ef25c2df261a328068ac303bbd28029eb3cbaecad7990d19e9f35e0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR4GL1112603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee32e44939a8aae40f7f25a273a64abd7833b83a4a77b840017ee0f5476cd2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR4GL1112604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b5d4c1ca10e010c7921407927ef7df82b7874363db4ebbae3bfb7081fe6937. 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/FR4GL1112605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d24117b3f92a8b44dce6a3b3d02d2e9bc90e9ef55ab00b07a6b2e44793fc62. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR4GL1112606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e240806a1cd3509ee211ac6a5cee4ef50bfdcce5eab3e21fd39005793859eb. 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/USLZJ1656477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae54b847b09e0b508eb57654dc3e3285953a16e894bf0a02891c81b600690bd. 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/FR4GL1075641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385ece21b6b403452c175ee3d82f846c5a9e33857b61cf7210abc60cfd5ec506. 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/CA5KR1521972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2770c9fb7cabbac11d11a696088f977521d8b71b006d5b286ae1d9c28d21e3ea. 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/USLZJ1657076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e09724bcd204e1f65648ed4a5577d8932a8d07518da6c11fa7a0353c0663770. 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/CA5KR1522004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c00be22ebd4a3ac576a617d29069475214219e4a72274101e077f497dc1248. 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/CA5KR1522009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80400da1e3a5a3d7c700f7c6151628097fd1c13da9cbc292f558015217da65a6. 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/CA5KR1522005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c6b3e308526d9613d872945375e77bbe955ec1b860f34ebe76a82d814d85b2. 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/CA5KR1522007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100d95e528c9d7eb2e94d0c7010874fcf09c684a6c386b608c28411d7eaccc14. 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/CA5KR1522006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7a799915f64be1c1f884db859ea445dc314aee3f7f4122265b31688b98a11f. 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/CA5KR1522008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63a07a77b0afc5fbaacfa8854654a9298b0fb072530d1631a47299478946127. 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/US8DZ1301209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6e54c93984bb5f33177939330f5b95c712a22e240298adc3ba6042f9210c13. 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/QMSNZ1311879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0531f51ddd6902800062c0013161e9a4bb6fde0004aeec6ab1917af7dce7edaa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMSNZ1311884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b19a6cec70820082e225c61ac652e00a5efcc2251ab7be7cca50bd998e76986. 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/QMSNZ1311886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29291bee52a63c49c3bca6b129fdea0f1c8264c1ec34cddb51a7abf98efa7117. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMSNZ1311891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3af54e57fbaa04a96b02f73f1f351fbde18f0f68555336f10df15f556ae78. 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/FR2X41442090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbef85d910ff71a8e3b1ee064d1e4b97706a86406cd5f8a8cf80fc2418576c4. 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/FR2X41442091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae54b847b09e0b508eb57654dc3e3285953a16e894bf0a02891c81b600690bd. 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/FR4GL1075641.