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 0x3ea686b2b29f52e85382e9dfd532c46fd262398721ee68cc17d54303108c2b46. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2290a08a-ea57-4eaf-b2b3-670f0dd57082.json and https://artists.proofprofile.net/proofs/artist/2290a08a-ea57-4eaf-b2b3-670f0dd57082.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 0xabf5b1cbb8c3fde9ed6be398224ff1277a88f29d66c36dfd8068287f207fb269. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:32Z), 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/QZZ7T2554417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25ae09666a705876f4aa395f25a7f332020c604af9f06b221b706963eb0403. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ7T2554406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76a9891aa11f790a487e3eb7622c5b8689c296be33ef970522556e89b10a2a8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7U2598848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdebee4bbd1f45235c1ef2c859efbfd27a57f877bde5e72c43ee50ac28364272. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:28:19Z), 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/QZZ7U2598849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d6f68d0a9ca43f7d584b6916fb955ae11628fdd0f3c39d3dc578b0f6f9228. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7U2598851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b41eb34fa6a43476f01d1c47fe1a4391afa7799b238fe1001d52c46b1f0b18. 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/QZZ7U2598852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb999029c1cf645b8333b886522d19b843fbf6737a9d19014f487c431142a60. 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/QZZ7U2598854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c5afc4219e144bad190ddbf31174371693c211a547558e5265cb9e01fe87e7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7U2598855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1701efab623b07e055db06cef8bae8f0ec6b6b5c4331bdb1abfb80eafa05e15. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7U2598856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef298156a4da2f01bc6633853886ddfa28dacc3ee0e5d7c01d3e4b1f987dab31. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7U2598858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b49112a30c3562baec49beee24f472987f2cc29162c30981f766c13302aca56. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZZ7U2598859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9540c310d9bc3a86b921fac10cfeca281c361a91cc8d7e5159b64b6be2c41a9a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7U2598860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cb36dbbcf92fb3edd6e364b3e262302f4835822181fb5699ab17378ded8a6d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7U2598861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213de00457d347c19c87ea5a9ad55a96a22c17d9128aa1a7f466e4c8390ee31a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7U2598862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6914d26ff7988425a712ede7a5af09974e6485a3b019795ef376664ecf95531. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:31:34Z), 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/QZZ7U2598863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca0cc261f379db7ce260ab0ea12a1d33c15e028bdcc298c718c6420618bb120. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:29Z), 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/QZZ7U2598866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d430079141c3f871fe8e99df3aab2f0bbb626585bff183146f46f985b44ca70. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:29Z), 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/QZZ7U2598867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd496cb4c5f6784470a1923e9f933cb340134b5792b13b42eb2ba0f55e39349. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:17Z), 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/QZZ7U2598868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e81a0df98186a74025e398b4be0232d701a71f3d350bc3bdcc41d8fd940f578. 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/QZZ7U2598869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dbd786e1b7fc6cec33e4b24d59f0dba5c978df451f16089d7d979a72b57d58. 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/QZZ7U2598870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bfe3f87a8b554cb7fcd7f1997fcf8d1584bc3440ca69fdba72cdda95e29275. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:44:04Z), 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/QZZ7U2598872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ab6dc2071414c11afb758731fd606dc59c3feef8c0e807efd337a2eac4d32c. 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/QZZ7U2598873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb38c599cd8c40dbfe8c62934a3dfb3d82910085805eac8369b45b0f9b6d0c2b. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:23:46Z), 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/QZZ7U2598874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd42fbd730861a6535aaf6fed3e37e1deb159e98dd5c316ff6d79e348bb22ba2. 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/QZZ7U2598877.