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 0x8c048dc419402f61de13b6a3d7e823cb0e6c3450529e19eb892719b78e1e2e2b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0467f425-6a40-4f0b-b61b-7f780c2cf727.json and https://artists.proofprofile.net/proofs/artist/0467f425-6a40-4f0b-b61b-7f780c2cf727.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 0x333eacb66f49f04773fb97e160fb49825705dba7b2bd8a5aace39e9f406d58ba. 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/QZHZ62292217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3658024bd0b37da5537f54ec02e88a2aa61e4a5223f3af9c41f9d4025e13e06. 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/QZNJW2274025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea16b27a664750af1715e7f921a905d08f4cba6267abccfb08d1bf678ef8b80. 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/QZNJX2254546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff7631c4b63b056ce458f174e852119acc8a11da846e66a93b95bef0a28a0fa. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BXIV82474661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7009b9ce57a499d001f28b4cf8d7eb2f7fa86696f2429ff25d7e73d15fd7a4b5. 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/QZTVM2319331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2b858904e4f04a8bb362eddb5582bd8aa180c604f49cd48cf1dd594a2e2a0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTVM2319332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8220a2b0aa5ce6d6310490fed98471dbc79202e3e9a413c9c184d7d61bd87d. 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/QZTVM2319333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8587aebd914818bb281d375204b8b78c48671500b663e4416ac7831ecba73bb5. 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/QZTVM2319334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c64116c89203a2a130f9abb780750e924e4ca850fe7fd5b5c867b5f59af8f4. 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/QZTVM2319335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5650ef767587b51be1c56b2b1d3670f87c2c14beb7fa6bb95c8090588be427. 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/QZTVM2319336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b2eaf007e53ef4eaa705865f41dda255cf92528d25ac312663a86c50f6251. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTVM2319337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d31c60920496a6933eb94fc122b861c3aa92c0cee170192e29b76029961445. 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/QZTVM2319338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2508946e25bee92e7470097b51c4bfc808a9d0fc2518a9e69d8c9a4707777e. 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/QZTVM2319339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6715ae3884257605fc22f975af5d279c49397b4d5a0d28dfe04d32c9ba611cdd. 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/QZTVM2319340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fe1b6325ddd89cb2d461701557019302012194adab5eec620c1d9b8cc388d3. 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/QZGLM2377681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc5a79c0fcf7a184985330e5e25736f175fd427932fbe49156a0dde33523e1a. 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/QZNJV2332706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b846a87b4fba27eb16d4c8aa80767040fa122e1937c97c8185b4cf6493f1e7. 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/QZGLM2295099.