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 0xf23f87bb368d6158b1f299a73ae25b1119dddce8576bdb77f9378a7a587f8688. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ade124a-087d-4f54-beb2-a39788c90606.json and https://artists.proofprofile.net/proofs/artist/4ade124a-087d-4f54-beb2-a39788c90606.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 0xdac8efd198df927a729d60dbd5c12b5d202265132e38e688f127624f5afea459. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:51Z), 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/QZFZ62083965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e921ed957d4c98855c26aeab521f3bcce160d4f6a7e1982d8492b2459fedaa. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFZ62083967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8100f59c15119ad55621ab60e2cbb084bba870203d2d363f2d4ebff8f5da7c54. 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/QZFZ62083968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af4f464eeaa6d002420dd963d26778e33153619942a76aae1dfe5707664d7fa. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZK6N1983533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd777854ded85fc0ca2969a8fec58da749d4cbe8bd2f9e2e71eb06f012e09c63. 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/QZFZ62083969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e63451cc6dfd798a1e3c7d74b487efccbebbd42f75cf4ca462b76c693a0cf. 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/QZFZ62083970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc387fd0641d6d626cb954d768fe5a1d454c6b658449a99cea4bdad5e15ed388. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6L2003535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f7579115afa2f03391696b4a0de8460e7b5cc86a9dfb837db4b7fb27143e35. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZK6L2003537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f60545372e0bdb0d87865b4138eea766ee1f58fc6435ffde1b2f47aa845642. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWT2059068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d3643e352f1eec3f312dcd8a290e33998c3a3d4bbf9df126287a8cbe2988cf. 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/QZHN42192228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7fe58592c08d6cd080acebeccb5f6bf66d95480ff38d71e405927d7a58fdd7. 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/TR0012100378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07194846711b9dd21043fc346b4a128d3f60e08de0241ca06d51cf559319f2fd. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/USHM22226546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b12627c37574729e72555b33a1d603582ad2e9cd5f721ec09027053250d5e0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:52:21Z), 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/USHM92290304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74715bdb4fa91472235d51b6fb215b8ccc1e086c5fb0e18d730257ac816c771e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USHM92290305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4438c12012564aa0f7d3719699ccfeb2f78b47a6b7585e6cc86a60ea892d102. 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/USHM92290306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1628048e2dd5b01ff67183de291d9e861ccb152eb36ba755d0655b6c814953. 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/USHM92290307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3526a0385a3a4eb13a03c14bf03c450ff7a070fdddc1e7d0df1a7c5232803976. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USHM92290308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55a5e65d71d552c6285d65b4e21e8ca1ee86e5cf5ec4769eb491a1e30ff09b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USMH92324625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4764d648dd558e8a43e6f933a481bd40a512b5633bf0b78c611a61b4ab43ef. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USL4R2369861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8787b4aad781ef6a0f35049c3a4b90331f754eb3da78ca073a5c6903e55056ec. 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/USA2P2404724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fcd128207c113c1245ef7d72027fe50634b3a818cf71664e0ea221b78d9a9f. 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/USA2P2447268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cfc00359fd0dd85e7253297281ab3aac53a79d7c5c7427814bfbde6da5ab75. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:49Z), 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/USA2P2537258.