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 0x6f76e4961141f188ba93bab19716e3f7acb5e576918123309b9808b512d583dd. 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/f9df9949-a7f6-499b-88ad-843058dbd2e1.json and https://artists.proofprofile.net/proofs/artist/f9df9949-a7f6-499b-88ad-843058dbd2e1.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 0xc3510f6fd9f1f0378723d5bbe39645a665302964c4540ead3b6cd9c89fd38b8e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCACP1624842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449809b14dfb0fec0b90adedaadc0cdcbb19cee4a96f4e52f4f22dcb1408fb7e. 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/TCACP1624853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe7cc37ecff8cfe218eea2610c7fab8210ee261e151555592c32b3a417a7f63. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:41:32Z), 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/USLZJ1901370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d544887e3f787ff43708db9d668c4a8aee8b5bcbd74982d59ce833dd6b0926. 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/USLZJ1901374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef2845d165e2810e1a055a56ffcde62ec0bfd5d385132635d2520bf912525c4. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/USLZJ2256870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011835f42a58fba07344613f452375de69317a8c11714566364805a1a4ebd87b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:02:04Z), 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/USLZJ2313429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1c62593a29d835afb2ca1d62bbfbc2585878295ce3a0e096049db324702cf. 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/USLZJ2313444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a8fd71175f3783b64e558c803fcde50da2ff3eeba2a3af25f93bab874c7b1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLZJ2313474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cfb54c5241fc103193b617ee0303464f621961128a822488d8e795732befa0. 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/QZWDE2360267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b4b895ffc4c6ab2a5f55fbc61d1b088d4c1e16afddf62b1b19daea56bf916d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTV32449176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e972ccc6b1502648892eca672aa819be293de42d2a0f775d2f94a2593a09df. 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/QZTV32449182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc392a9fda3e6c06fa9f404139d92b43f5fd126cee614137168b72d0dba60d3c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ8A2485108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d1a4f3ab7b595392446e745cdba1e664ed98a89ddd945621498958d360c52. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5FN2133513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b579fdfc1b7d7403187c23de8d6968ccbb1434fe7ee32cf4374607fb4c053b2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FRPHC2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4772594179c9fe41b39b3ae24bc30e04f2b757648d01467faf8d203ad4e7b31. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:14:42Z), 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/QZTRX2320530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35a357f78bc039cb8d74a767432b34a95e23022fb4838461e05ecf01c2affec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US25X2001515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b579fdfc1b7d7403187c23de8d6968ccbb1434fe7ee32cf4374607fb4c053b2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRPHC2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48452d4f434de554fed80178c6395e6c37a55e10a69d843414171757b3226e1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12347155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4376df86d8fad712d68c28c93d2ddf8b79c58dccf1e99454907a8eb6507323. 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/USLZJ2586505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af6da039090868787851cfb8397c3ddd0a2aca1f6201642cd8334cfa0a243ba. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZWDD2434600.