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 0x52156869d05ace9de770ab8dab266b66415dc6465842ba1e6df0859f6df07103. 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/8a4f76d8-c5b1-4d1a-bb67-0a2d52d307be.json and https://artists.proofprofile.net/proofs/artist/8a4f76d8-c5b1-4d1a-bb67-0a2d52d307be.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 0x2a1c659a17650938d8269d5e2935f5a3bba9d754cde65f031bbe3c5974a9fd0b. 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/GX4R52487836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe968f9be4dfff57020c3f19393b0fdcd2d6e41e253f54428a6b99cdf31051924. 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/GX8LE2478599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9047159072d3adb31500f4c9e1ca147fac2d514f0a9d875a6ce7ad1454a99284. 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/GX8LE2449721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0a41ff33fcb3c27438c7a2d7216a2699b911f17e6bece4bd62fe03b36bea5c. 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/GX8LE2443510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0733e0c5d3180564b165997214e0b4ea40337346ad929a4a3fd8807acbb3c1aa. 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/GX89G2487400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a98784631b16bd1bcab9c16282e2078ffb5ae190d1b39a3aed0a51b7f610a6. 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/GX5MX2395736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092371bb742cde63516e0cd92d425f43b8b4109b9dc01ac172b661326e7d901c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GX5MX2308870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd251a4a7f91a6e825ff0b6245f0fd745614554336ceb99336e25188285b0bc64. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GX4R52384683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6920d290b3f9d2865bb3c98f320489f81e132256fdd1bc5f4ab9096cbd36bab. 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/GX4R52369026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81c0d1761267b687bafd8b3d131b917ed97612b5913d41a30dcf59aadcb74d4. 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/GX4R52321945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74b1615994aa990a89b8451e46fbd2e1005f9cb7ba41f36669bccf63df36b0. 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/GX3HH2392423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25e8a5d46c35d0f89ce8f75be67e53bf164b136451dabbfea9f09e2b472e0f6. 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/GX38U2389845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62bc7d14e56f843669988f5c902e780201822612a25575e3ba37d33995c9d25. 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/GX8LD2304475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7292b311517380ebf484961653d1f386255eadeb2662320b9b4618b855590b. 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/GX8LD2374809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06208d5f8e7dded6284ad2752d75152edffdf1a010afc55b87022525ce6ba6. 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/GX8LD2337865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9f76c2b3b5da0708f46fba3fcfc287ba5835802f03eb4430aefcf76c58f8e9. 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/GX8LD2303976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e3f61ca79c9c08178cc94648c2d59644dfc742941f3017fb7ea75b7baaa93f. 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/GX89G2378355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66cff1880f953b947e614762ff0cda66e3f605fe450b392dcea3f6d916fec31. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LD2232028.