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 0xd1fd447fad840bcf3fc6ccffd650f6cfe409bb531371855d1a2e6ddc3bb1e2a9. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc00fdba-b24b-49f1-86e6-572563a8d93d.json and https://artists.proofprofile.net/proofs/artist/dc00fdba-b24b-49f1-86e6-572563a8d93d.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 0xfc9bbda55b497d4dfde25518da97601eabdc12e71c4e02c85058a6c9b09a57cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2022883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aecac763385cab7df67f1f3c0263e3591b4a0b865f6cf08d57555b5a98d0f7. 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/QMFMF2022887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c89671a5adb78e845993685ce356fb8485b9c8246e57b366376eacb19813e7c. 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/QMFMF2022889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325f0f93678a7d7af2afb33ef020a6c92e364054c14639993e0ee76f6342ac69. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2022890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a74490ae1f189dc19c8f25a468c2ba493ed6f866322dba8dc7a7565f93383. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2022892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66d69770a1fe1a1318685894364aa53d123e04723bc2422808e3c75fd202e0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMF2022897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52d6444ea5dedde3b4329e25769e4fca6981ef2a0821d732d7d7fc6157925f6. 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/QMFMF2022899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b84dcc4130c07f45290b95946902d7f51d33a63699ef90b7a233a432f515d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMF2022903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2db5695879ba670e532b648162fff8ad0c8dcbad6a8c884b61dffe872b544. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2022906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d85075f71abf7c88f160f9e82fcfddb6c0bd20859c624bbc02b1c8ee8e47f59. 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/QMFMF2022907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0076048cf7d4513b70a3b07503328d86cbc889245368b8d3988df1846ea68325. 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/QMFMF2022908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9e8b95e20d8a5e9794b02aebbfc9bbc481e3c76a6348439c768fd49511bfd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMF2022913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca08869035f3e31771f370e51bb0a97e88bf23f84068e0427fe5d7520b3b6400. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMF2022915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed3adeb8358e0c30472e6cadf61f067d11fa033402468cb133307070e12c8af. 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/QMFMF2022929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eaf2a5e2e0eca9a9f88da6ec6fb3d16ba8ce18319eeff8ef0c661fc7a459e1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMFMF2022880.
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 0x8759596a516018e2df205ee6c285a1e746b3645d5f49fb08e7225ccd0281e820. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QMFMF2022885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f9d5c50d7d421f9e85bf8a3874f951814b2dc488110bb5a6dcce2eb61805d1. 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/QMFMF2022888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf437d6b5e219d268aa7de58649843536848028e1858659305d382755d55169e0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMFMF2022891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a360d3e4d32f38afcaef71b78ca57214b8046e05f1d2dcdfe8c47cc4d670421. 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/QMFMF2022896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478b67ec706281c37840ef5aacb5d21762a9b21c8e6c12b12d6049c52b647e78. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMFMF2022900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb40472a4ed9e6c71a3064a750b7ee3cae6e28a34e4aed46960946e83ee2f9e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMFMF2022901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5424df9ea765c9da02eeed6a8295e3b8b59558be7f2ba31550bb4337d29609b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMFMF2022902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8a1e7f0457bbf6d55352fa325dd171d10f49d1cb886062c4200166068a399a. 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/QMFMF2022909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6166f02aa2ca3c1f3e0c17dcb6a21ff08cbf2ecd63a03ef7ff4a396065a7a2. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMFMF2022912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ff11781c90e6ed4aa87f210e8525cadcc724905320d513838ee02aedc967f8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMFMF2022919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9a75227fd03a665b14abaa1988ebf3554f31d2c9ebe335492c20906798ab0b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMFMF2022920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a80986a03e0b1893ca197ae2f3da408e406258c12ac32c63bf240f352a246a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QMFMF2022923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383336dedd3da1de95653b2dad316241c5a6708ba1011fd257d1827ab60761db. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMFMF2022927.