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 0x479afa7be8fcf6297aa0b682619861d38270bd730f5ab93f2bb267f43f7a8498. 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/8a543830-69ef-4a6c-b753-c5e9b3906585.json and https://artists.proofprofile.net/proofs/artist/8a543830-69ef-4a6c-b753-c5e9b3906585.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 0xd6f62fe1ee86298bf721e7e24bfb5225c62749a041c29074477dd42cfa36276c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZDA42371163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faddf71d7eedaef7eefb994f1b84ec7984083563e74ebbc9bef63fba4bd76b4. 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/QZDA42371165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786282e7fdcdd1183addfafbd7c5a8b49ef431b2ebdb0705e9440c0e0c34519d. 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/QZDA42371170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74ea563c730ff4593430924bd9b04ac825bf9fe0eeef28cbbda9d597b12129c. 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/QZDA42371171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea27736a3d2099697bc088ce01f3bc6c449e3da65cccb3825ef3987407da2e7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42371172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f1dada8ae9bd49eea27cf1c2ffbe3b02b9cd8081b540aa0b1a23c39109d953. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZDA42371173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226a0fd6f4676c61fd9a0fffdb14b5f1d9e66165a089e63d2ca1c21c1bdbe323. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZES62322717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc1d038275d14076b58a6a310081b3fcb6db3505dd2bab14eec6cd3ec1436ab. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTAT2398426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa789727c86359ede58c64341f483f9702cdbc8fdb83bd24fb452abf41aa0705. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB72356832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ea2a998d0d568a0d279ea53a3537cf7119ef4cbd2fed2a096c9484b60000f7. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZTBC2482501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9222a89417714b9f68f1516ce0b35ea9dd64daa313fb78254fdf2bf2a378ec. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFX2426359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78329a4643e8c7f4babfe409ce8c0f5b937850e825f2db397cd2c8b184e2f6fc. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZWFX2426360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b44fc4df1c224233e82ddf754f516e0cb9d6465378c47f1165ad621beffc50. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFX2426361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51328503a0bbe7e12c9e8001fa84055c5bfd4fc36f000ee4149154fc3878bda4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFX2426362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4337b19f755ad9815d20bb65089649bd8da23d5405c155acfcd7314c524f612. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFX2426363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a4fffa3592bf71d18d9df576f34559ced0b0c918dfa8711d1b3efc94ea775c. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZWFX2426365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef8ef9851aaf40000e476f993fcc51806426f0df768b9091e167e9fab9c576. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZWFX2426366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2931ac996b60b3d4d0adfd1fbd633dfba0e9841a2b438d71e5d0ef6fd4874c19. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFX2426367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf002db38157bfa95678eb8a3ca862a7338bae3b81debb63cc673172503a24f9a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWFX2426369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4a20baf36cbab60f8d34ed2d43a15ebadfd1cabaa1ff9a184b556cb5973b00. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFX2426370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bf03a5e998baacd164937ab25eb110173ef9e11ebad5a0c8b5cf51ffb32325. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFX2426371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de140993164252d8cbf7d218a8ba680757c74f76832c3e464585b508f814c7f. 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/QZWFX2426376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f56e32a1753290ed8b834d1e690f1c198f64fcd63f96e15f50fc10366d1cee. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFX2426377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43ffff8116ac8c7dae7fe5b117ebc7d25aedb5d7c4004a047b3c4c9fc87cbd4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFX2426378.