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 0xaad087f4423ce97111aed49c8f7fd44880b0249f880b3f4e1186111e17da1114. 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/139283ce-ee43-4e3b-a668-54ea3a8d0d70.json and https://artists.proofprofile.net/proofs/artist/139283ce-ee43-4e3b-a668-54ea3a8d0d70.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 0xa55d3c718c2983271fd13d43fe4f0bc0f297880cf0cc8f2eb903ce77d43c6bb9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZES82176485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c49bfa57e3795bb0fb47d57b18562bd68199b3cac31d5ed57e8580ffec780d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6J2113965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347e1b4e18afc3d2c155f97c6192a6df1491c4399e54b442973e15ffa9d38a0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA52155880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674d3b82f6e45f29da7097648e2efa9471b16d3dc0bfb036ad3f74425899e845. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN72125658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052268f7c33a415d02653a1414bc5734b033b7e67b5d68e9885faf6d9a2a2b62. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZHNB2180604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d05714f637aa0d98990982fb2b7cef196bafa3be1808d1f880b9686b737b5ca. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6L2196247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf557634d8ac7c068d5320ae0cdffef6e3bf6d689ac7d274b186999d2afcaaf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6G2130027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16602a9ca052cb49fb80af00e3e9583f3a31ebfec866a6f3686c4b14f5269b5c. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:57:39Z), 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/QZMEQ2162362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf06e3263a723b7a2444a878be7c7cdaada7f970833c4de3a2e9fcdfaf867cb8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEQ2107138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e20ae50ee122674945dd65d6cb50ae5993889fde1596cd12de3a376a7fc935. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:46Z), 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/QZNWW2126928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e20ae50ee122674945dd65d6cb50ae5993889fde1596cd12de3a376a7fc935. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZNWW2126928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc706e1a91e0290fefe75a69614a8a0772103437a8e33d6f5cde8a40135682b0e. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/EGA252201107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4640457ec660638c3a63c81bfe95320e7a1b82fd988b19b142f62602a3ce4220. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:37:38Z), 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/EGA252201405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b81d50f14e9e47d2f01d706c75fb74efd34e937e5b6dc8e3e6153461b2425f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:19:33Z), 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/EGA252201734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6bd63f16584af6617f0f8186c1fb76a98fd3171c0251af06071428364e8091. 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/EGA252203505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8909a3c0b2003f9e429166578c8c9734191b7bb697f9781e2a4723d7713ef55d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/NL5UZ2400612.