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 0xf4b11cb63efa8e9b79938c9e144585d9b195e7670747fcc9ad21d7effdac0c26. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf95c576-e0b0-46ad-8cfd-d6c055ca6d8d.json and https://artists.proofprofile.net/proofs/artist/bf95c576-e0b0-46ad-8cfd-d6c055ca6d8d.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 0x085d7889d40acb043023eb777b70ad061a8b65a20d7cbf2ff46c7573a64601ed. 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/QZWFM2372470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc75fd29ba84234054caa8360252f54a07bb79b45661397ac57f268ed3951a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFM2372475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483b832f8416f54812bd40e400b49941d3530e06bc7260b779087db5018d6696. 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/QZWFM2372477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28defdb324a4b23c4d980c68b2afeef778b8ada38d0a4b121310d75812de677. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFM2372479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a7128191b1974ce9bb25367190d5c9ed578cae1cf3393226a76921a91539f. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZWFM2372480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b3b45a6a51267998c1b01044a08e2e56d297f37f2987b3cb01830ea9dbc552. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZPLS2419724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ca941c75e34aca1a9d1bb9468c69efb5a404b554e30ac6937146a21b0a1888. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZPLS2419726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ba38073f05f14962ead1678bb9a99e08988b56039f41dd489852a98e9184d. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZPLS2419727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859f302787918a2c767fb9cb70990863554edb93e580afd6432cbef825f6e38f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPLS2419728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627aa661a1a56db3947077184f940281a735b00a1e9f93e501855267de584819. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZPLS2419729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6ab1a09ea495e93d31fc3ad66409196b352dbb0b3b14e29d3cf044d78f072. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPLS2419730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5ee8e037a4fa9dba1c956bbdc674a99cd209ce472e14923f1b2dc098169c31. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZPLS2419731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab30cd191a52ecc087f35f2c4ba15b678fef1307c3da559997121bee54ea3b8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZPLS2419732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00472228609570565d1b29646340f35fbc9dec0e4cb043d00044a4eb98cd87e6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZPLS2419734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5feaa3c740cda746a30f6fd1a97bec675f83fbd4e72efd5ad6b445e5ed4a9c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZPLS2419735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed47f749a651e7685754036c5c914111ecf63f8dd095d742c107e7a2e6a2248. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZPLS2419736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3487760bf6a06e42aa1fbd49a8ceada8e5e06cf3b972691a2b7ca50832b5624b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZPLS2419737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf1067190c781519372fcc9662f5e68bf835376c4e4ebe11988f0eabb2cc4e. 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/QZK6M2537455.