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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e23ef8d4c92d85d85bbba81a3c5f8a9f18143772eb5b8be20246cacd35aa40. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22e20bfd-5058-4320-866c-b500fb87557c.json and https://artists.proofprofile.net/proofs/artist/22e20bfd-5058-4320-866c-b500fb87557c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824800d5454891f86b571ad8c239bedc6a2a0db634d5ab5356ca286207e112b7. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:06Z), 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/QM4TX2474856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77134e60eb11ebb9f04538775fc26780674946ae896147383a22dfd814c45f7e. 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/QMFME2247793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e01aa236c9eb088667958f9bb05d34596d2bc3676617dd074956579ffaeba5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFME2247723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774500d3d020e509c3c8741d1644d32a244308b2164a6413dd00c5fb93a6d7a6. 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/VNA0M1908264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd41bbe5488cf1fea1c95834edd0651ee740bbb2b3a1bc8da549bf7dde1e4e0c. 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/VNA0M1909516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0cd638a23b20fb2e3665ceffc506bd75916fb693b9c160028a04795d9aa07e. 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/VNA0M1909987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3cb30c608a489016b7bed8fdaac0f97373567277b9b153b183a9e1a46bc3b5. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/VNA0R2000686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad6d49dc5c3b4f12be26fcc163d0e564b0092d15b91029ecad13e1c7692dad. 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/VNA0R2000687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede887376110fb3ae0e9d1677c7d84e8e78a7a7e39925cfe9fdcef6d894171af. 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/VNA0R2000690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08671329b1f76de387e02cdc483e2722d3fdebe45421bb8273a7f4f7071013. 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/QZWBE2305157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b6007433bb199048743fd0dc29099c0f16a0a0fae6331bacf291a9358a570e. 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/QZWBE2328487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd562ecf1259e5feb8c08b52c5cbaa36efd635f3c3864dd643997b80658ecdd3f. 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/QZWBE2329552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0aad482dbfa58e8d7e8c8af14e493fb816ccfbbf6ad28909005ae8bcb8499d. 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/QZWBE2345200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8784b1895d321e112a1c066d9da7940eb084d724301634d01b06ba3abe32e5de. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX762331509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac977668c680f0dae8dc99ac798241a132bbdba26ad8b39e725dd6c2e0dcae1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SGUM72400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec032d0d48d6c96475224444ee9911f8cdaab49afb2cf27f2742787c30b2b41f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZYHM2366213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71523dbefc06d4a1971bd74b35e6612ae35bbb517ee4ac2cb7188a040abbd2b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0R2000478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c04047ca4e34b1b0a824252306a4a1716dd90203bb2cfe3a1aea731e8708d20. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFME2275955.
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