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 0xeee56ce30133a6f2656b5d304f116052db2dddc0e8bded87fd5fc3eb5633fc1f. 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/2a3dffbf-6fa6-44ce-ac1c-f1670471cf21.json and https://artists.proofprofile.net/proofs/artist/2a3dffbf-6fa6-44ce-ac1c-f1670471cf21.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 0x9fdd0f315e2e205b23d37f92ba25bb14224565be56674b6ef185d632650ea073. 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/TCACX1719434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d66c7e36425e51c1d2ce64dd3f016af39c102a4a1f62fdd625081e67ce78b5. 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/TCACX1719435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70235a0510f1f404b0aaa9b12bc7d479ead38c9ce1b07a1a278e448bbd901ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACX1719436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af0f5dfb1a87e3e9c659bc294902592f5b6274cc4f424fdc37d75c19e2b7b8e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCADG1740189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eccee1175052e79b239c0632fe8dde19416fe32b20e59cf3afb52f90680f25c. 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/TCADG1740196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e0720173a2335cf63bb791751d402f4ee24cd388e46a3a247b7b0dbdc0169a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCADL1871792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f98f4078b5a4a614539a2bb21110ccea8384dd095fc3bc7211e8f12ea201d38. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCADL1871795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bee390c9ced1d77a7e25b176f73fb612b67180b2b76a5abc53c03f95b0a708. 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/TCADU1891573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9922d390d140f59fa6232428629366d1f40166393c7be06a65cf03df53ff2c. 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/TCADU1891578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3417eb945259c14f05c421872799520f2c211d2fbc5ec01f02b7d3e9b3eec04. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCADU1891581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc231161e8e04b51f1a6b9c43cbaca4557ee306e9996406915b0e864daf1a818e. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/TCADU1891582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d77b0506a4b039d5c86f4c55406e5a618937eae7084282ae159e2137f3f6d93. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAEN1911321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354e7e74a059e48017d1a529f2d47e7fbe725a7d77a3e5bde966fee3f7120c4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/TCAEP1914753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bcc0361aadcae47d4acb4737867ded29043452c61252a0ea6fa06beb1cbd31. 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/TCAEY2020938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9bd4dee015dd492b5c3dd2b2e88fa08c3633aacfcc900ca31db446849476a6. 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/TCAEZ2062297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8348a165a6a341a7829eeb3e5e6720b6326e680ca9adcf55de9121b2d6c18f88. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAFC2054562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f7633e35665647c7ef8d508df388e3208249149cd6cbc89c3c75c583ef0b98. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAFN2139922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ebc10504f8d433af78b61af7db4dd1619fac9e1a9faa3a48aab34a346323fe. 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/TCAFO2177754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c5c395c1ded8b1dfa4ba0d5335d16d4cb68cf22ea331f17e1a6a86979a4d94. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAFQ2129938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca076dcf596e07217b39fcb2d0729bde14bf22917f9c8330ed69b2e7812eaa2. 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/TCAGB2281374.
Scelestus (From “in Search of Darkness - Pt. III”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce97362cadcacabf6e0bc194f50b52ddef224b41889bb7e204b58861e1871b9. 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/TCAHH2317997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4e2b04b0fb411d36d7c64d9893a906d99275c386d6b074489e8d44f842c448. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAHH2318001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199b6e76fe3695deb42399ab6f819a34eb6ba15c282a2daea08109138a9175b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHH2318006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0725c95faca552f1e9a2152993ee5c94411844fd8c5b27d0315f1fdfef25a2b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHH2318007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe78d353e43a4d84eb0b93566ef0a7d75695ce3d5cf5ec4383bbc1d7bdc76dfb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHH2318009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6564e60c7afec12471eb1411739fae1c8d37773ad8766e5591fb41aa92bd560d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAHH2318012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98595b7a3b47e0be7eac99f865b78930fe314c157aff1270358b99e71feb55. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHH2318014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a384f84a26891ac8a45b9ebebbdc7334c0b9f397bb7726e7dcb6cc34313484e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAHH2318015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905487b76d6f1b823dfd975d802693add75160e196eb0b29722147e3e565faaf. 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/TCAHH2318018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa0f2c19becb3bb87df2074caeffb6349254be89d40f4262bfdadc76559e235. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAHH2318020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa29015b879f9d095fd54bf197c629d34f813db4e77dfe8c950ac02e3d87a7c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCAHH2318022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff3d5a42bc4c4b0e0c0ad645725290dfdda9c5de0ebba549de70febb0487c8. 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/TCAHH2318025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e5cece00ec3c1bbcad9fde897fa0171c0260284c1da8927e33ba0a0d5b4216. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCAHH2318027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fafc91641af60e18c046ee53806198bcf48d76a9a2f735841356c88b1e84184. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAHH2318028.
First Blood (From “First Person Shooter”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef53788a508e027caa248532c7770bf04a3604a46ee4f8a4ebb8b1db06f6019c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHJ2326706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef182e04946a00812cf19891dd477c121f9deb5ed01f832fe7b7c55109bc3716. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAIB2446774.
Murder (From "Terrorbytes Original Documentary Soundtrack")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06351a9f9149edf9e7006b59f09bc355ff8b0360c9f3738c7a2e26f59ea1d83d. 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/TCACQ1647579.
In Search of Darkness (Original Documentary Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8ac3d0d75896ce16ca86f91a84222454f7560b36413ebd1fd199584740818b. 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/TCAEK1926304.