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 0xd9eedb0ade1a477b26e2d1f0a5be3a9c8b0e8814b64a8509cdc716f64e3699dd. 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/71f8efc0-891f-4e64-894b-23f5db8eee40.json and https://artists.proofprofile.net/proofs/artist/71f8efc0-891f-4e64-894b-23f5db8eee40.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 0x4e68435c566c089ad71f373a2c68f4ca90c5a27a2dda90766cac33af1592d966. 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/GBRD51700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1179782fdf42bcd96c3b61f9d5d66dcabd1edbd83d9004d528bc6f8e96b207cf. 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/GB8KE1850193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70471554650b3c40119994dd23a4e0e13fc3b8be6d03a94792f9d78a04d98938. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:44Z), 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/GB8KE1852881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0bc894db63d012110c3e40615c87306c969aab636b89e35b1dfe49d272f495. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GB8KE1852883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed445a84f52ce4e180cbe3454e7ddd48bc56b682a269f8655fdbf8dc9d62132. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBRD51800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d58846982abeb2e1842440c8ec5306fab82afff4694ccb2e51d718a9cd84d15. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GB8KE1858338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91029e1aff81a30ee4252618b2b846da5de4d9d832546af86059a1574e311481. 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/GB8KE1859383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6819c7662f3697364df0f0ae532cdf31fde45d9b2c9508375df6d3ad5280622f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BEN581900523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9521594b35bdaea2b3bab3be25be3870a10ac1eae52cc0f0109815fa9c40e17. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKFTL1600168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d08cd1c2b54821929bc9c11ba44ef303f9dd112f766b7e49d9cea3d9b188d8. 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/UKFTL1600169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf348efecb7b98b69cd8c6762d8b84ac9acbd13c221e8b7e3d32cae6beb34692a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/BEN582001160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d5b1db75160162bd79f9feef26bd284c54d79cfeefca9c862249e11d7af2f. 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/BEN582001162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffac8b95a92e33f6a665feac53be40374656538b1c0008428a63d9a8830fdd86. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GB8KE2156876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3770a6b3f793938335f5d9467dcf60cfd3815ff93bf184e865f835565a4486e4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BEN582101077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6131a66774be9ab3b1484cb396994d242d8324bfbe4feacb7ab7d32d4ee530e3. 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/BEN582200515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaa605a1ea3d12f7780ebf3c5a94c5118e47b8debb39a2cee3992ff8aba416f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BEN582200516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8a2b57194dcfe3ea1cc2853b0ee12fe475023a0492f3b31f93ce12962e9d94. 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/US38Y2304721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03efc5a38408af4043c87993790f74b08d8df6e58230d85dac0fbd0db3261350. 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/US39N2308955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b704534b6ac77c51d4adc2d6b5c57482d8fe97a255d3bdd3d8699a9a465787. 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/US38Y2549050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46cb094711b00fd3d7cd0609fa422a7f790cc802e11c6b8cb08e731c8109985. 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/US38Y2433673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43318055fccd91bf80c935198f056cb19889470f9076cfb9edf436e27ba32b1. 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/US38Y2433675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9529ece6b8bebff7665817f54d907f7f49e2d893e7f956e3e4f4a0773bc7732e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US38Y2433685.