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 0x6e86b8aaf8bb9dfd2a7375311296e6b03a8b2096d1f6a156f283d6d7e3af847c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/589987ab-217e-4f6e-89d2-10d671e652c1.json and https://artists.proofprofile.net/proofs/artist/589987ab-217e-4f6e-89d2-10d671e652c1.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 0x94c97bea311211e41d8757f1d4406ebaac1449f0a35a1c0714e4e5f1fc178c6e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA012551567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f30a637c49c8f8081bef448838df1cb6dfb4d2f7f4267c1cdd4b7e0ceeaeaf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA012551569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7916a982c3cff804501eb03885b43e36b2820313ad0a266a10ec867c8c41fd. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ESA012551570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfea5020fec164d76128edcb953165bc061cde25f42a54c1bce0f33519b7a036. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:26Z), 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/ESA012551571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99a4fc1a8da67a3c16ee90547b13a2751e1d04556031817a51dbb3453769c09. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA012551573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234507397c8a6776f884388f791a7b3f4e13fe53fdfc94571b4ec34b72b7b2b2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA012551577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10c45bd9c5c2be8a542258f99a60b3dc5fa9f3ce9c1e47299db92366595d3e9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ESA012551578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116576176da724949d49f8b5cd47f4deea7f5141b5c6cba43092f8f50d4b8b29. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ESA012551580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8978e8f3448ea8a0b7f9339a7f0068d4c8632ab2c6fd124a7fa45fec0de0f68b. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ESA012551581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9168bbef0102ac55df8cc5f99922f254863f1bd029bc2c7f816a976ca7fcc48. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA012522119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac259ab80c405b8c531f9c5211fa99a498e32930cf4ccc519cae6ecc834575. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ESA012522120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005fdaff8c4380058f1618c77dd8002248ecae3e2fbc080b6189071cbaea4da9. 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/ESA012522121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef4fbdfe33b67edf3b2e069843370362a8bf64a3a31d64e42546616cc67efa. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ESA012522122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a926215716e80e69875db0d0394ccc99df2f91b21b3c1e0ff80d2767fd2d87. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA012522123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53457ebddc9f86d8c3af3fe8a6ff8662b93891de132e5773dd3fe99fe572b39. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/ESA012522124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ed2be35ede05f89b801f270102f0629fee6bf1025753861459a81200e8e33. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FRYAS1006606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62e24a435286ab5682b569ca9cf31392b41240a382e924bced4c08f2bf03e1c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FRYAS1006608.