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 0x041b7d8976b9d0fea3282734158c645ee8ebfbbb88208a209e5cf850fdb59421. 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/6a6a37a3-0ffa-4a71-95c0-0cb40f0d58bc.json and https://artists.proofprofile.net/proofs/artist/6a6a37a3-0ffa-4a71-95c0-0cb40f0d58bc.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 0x92a4ce1e723d787d395dfe4a2a61e9d2267962c12896da66a34a0ff7d209237b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN62154414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a416edca7eb4bfecdbd40e040c3b04563e30477589dd9a8df21cf126a83a1. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZHN62154415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b471009b477690713381216046d6912a00ae6bd9d89e6a63bab550e24e5442. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS7J2356282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2ea54ce376b9d182fb318eda625cf4e363a56748cbd3f6dfa764908d9c8ba9. 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/QZS7J2349116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c51b02bd94947d20b9f10f2762a766f5bbd8043e62f1867848c8efc5eee067. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZS7J2374239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9b0dbd6122cbf2f8d7fbfee0528ca5f632f0f6da39ef39caeaae606f9806ea. 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/QZS7J2373906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc837ffc5d6f77c83f70a34a909bf8e293aa17e6188cd3660f7d236c9b5b146c. 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/QZS7J2365021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afb71df06d8c8a65404257324fd7f390cd2fe9b323686354e5eef5b07a2215d. 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/QZS7J2313384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28e8ac271e9031ddf7d39ce9bfe2c3b67f7569d64a18fbadb371d946ba97ebf. 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/QZS7J2356889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc050cdd9cba5bbe7f188a187639cd3d321617cab936b25e2f1fca5f266d44ae9. 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/QZS7J2350733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cf2920afdc7f8da6ab13333eb35d9e9e2450d6ef8a082e30b22ecf5d3d900b. 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/QZS7J2305667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801c866124295b4b9409cefb76a23411da4e1f5ef2b678ce995517c9385da310. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS7J2347934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24894d8719e64bc9ee630c6e7ef81868ab4ebc74df2c4466bbbf55244821cd9f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU3197447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253a1f68be4585fc4db6f579c0ff641fe052f8470e2dc47aa583644ecc828ece. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU3197450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19c391068ca0307f372335adfbe4ab6198644fc130001bb8c2314a706a7c2f2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBSMU3197446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2ea54ce376b9d182fb318eda625cf4e363a56748cbd3f6dfa764908d9c8ba9. 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/QZS7J2349116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366f5e67c814c86b5164a648610de3c9836c47dba05b9abb9f10bae7a05ee4ce. 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/ESA011786047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1452c1d7740f36f549feb8e61ce4f9ec6386d028fb384740e7920773c761ebd. 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/UST8K1882010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d9a678da4f7350c42c1740a5773d5cffb7181ce013426ef9342c14c0ce34e0. 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/UST8K1882011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0450228034a255a24f6cfff2033eaa9e0de1c16520ab08eaccea4825307006. 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/UST8K1882012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee7b4386a13b42e8a0c739571cf9bb91a8115db5773e2d3aa16906474149bd4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU2493160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a90f723a5335ae3598b678dd460e0c89e6fe5daf3b8e286060278c5c5af8d7. 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/QZNWS2026748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147e3e85a8a3659d875cad3db5e33fb903816b388ba66ed77430fbc750c28e73. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWS2026753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e2b9ce6f7a8a0dd4f7b06b1c80d0c8ca9bb60da75e0e9ff7d3b0ed36c5ae7a. 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/QZNWS2026754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23620c8809995bf7ce99185dd28413148d8f6ad42df304f2b8f571497218ad47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMA22070697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6000ae84cd7b3942f74c0e306d1d517fe19485c71819e7ed869fb3159d469492. 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/GBMA22075538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01b60de02da3088b3746ca6129d76f5855f69067621a1d8e2287a2a9204b7c7. 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/GBMA22075541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7b8acfe737e86f417461bc51ce5bdf56c600892da79235676fbaf148d83741. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU4105432.