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 0xcb25f9581889af3a017f7faa0b83b551707fcb3d50c1252081dc53a8f25837fe. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90c52aa8-5c57-4dbd-b9e2-72ccb2456194.json and https://artists.proofprofile.net/proofs/artist/90c52aa8-5c57-4dbd-b9e2-72ccb2456194.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 0x93f04016ca9152df24ad2ec573e762f9bfc67c287892df5f02222eab2e092362. 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/BX39F2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde9baf973af8ef8ede039223c808f31cedd0e8e65939df5c5553ef77bceb87. 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/BX39F2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d0f0af2d0d9a3c31240b9b86ebcfcc976204f8da313eee59fcc24dc94e082. 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/BXBCA1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d9e23de11bbf905727e79c68c8d48ba089a7fd9b342922831dbe0b1c842a45. 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/BXBCA1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfa75d4571bb8fce151e1f21ad50f0f90281465107bf6946690207cb5a5cd68. 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/BXBCA1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037be7c249ad2e9cd2d98953526ce88c6d48c1898237582479a0bd76101b8d39. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BXBCA1700003.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca60a700ab0de78ce813a5474eda191b40ae37e0c64f80e78d7c2f226b34429. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BXBCA1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ecee237c6a06e27e8573d3a02890a92c137fe627961cede79935342b10b0cc. 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/BCT5J2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3541af90e037abc97cb2ad9aad2458c8326dd260d742a5d1994bf22cb0995a47. 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/BRAFH1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2b6cf8495179be7bcb4b9ee2825f90ad347ad08f93784c102d8bced8d5adbd. 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/BRAFH1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4d76264d8fbc5c085a1767a5469d7fa954416c1162b40143ab1fc411064af. 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/BRAFH1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a821b32764856134f258826f27069ae13950bef9f0aed98231350f950849c7. 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/BRAFH1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6a2b296a3933f8168fbeb057ed14b63a1263fd8dedc3c6efdf08ba18542f39. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRAFH1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e7bc025f563ff37476386ad8d00fdbc79c1cc11f0f9e91366afd8bbc980e3e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRAFH1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb981e69c4903a80365f14541c3b41ec647b32c607a6e100941f1bb0b05a42b9a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRAFH1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5898940dcedc5c3d9b673c8a897bc7903b7b0927ae44616c20b91df3ae4beb3. 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/BRN352000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece2396e76ffd67d0ddea0250b5eeac1726c15d0f079ca1120a78119feeb7ecc. 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/BRN352000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30913dad9683da933be02d23ee6f387deb9d7a85d5628b0a92623a6816f04b95. 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/BXEC72100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2b71179af984745925faebc5bb39a62ac6056974ec1fa4004cd452a3d311f. 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/BXEC72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3268357c04b68fd4066c8ba845780296886346feca9a4a56885bea7d22e6dfd1. 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/BK11I2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887b0a736de9573eb1aecc10a51c17f3d4a379380efd4462126a46acd21eb9a1. 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/BRN352100004.
Eduardo Maciel e Luciano Maciel Cantam Grupo Céu e Terra