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 0xb131e96926dd90d3cdbd79347b814afe79a628c0d5b1c952fbb87461d7f0b07b. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd4a2417-1e0a-4ebf-b4b4-fab2bf218f35.json and https://artists.proofprofile.net/proofs/artist/cd4a2417-1e0a-4ebf-b4b4-fab2bf218f35.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 0xae035e471256f8468b76c25c3e161a1bd24e548ecb0d9b21c118c2cabd1720c4. 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/INS671500741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545dd0026becef4f76e2dc60e9cc85598f9389a61b051aaeaccd46c442f99b00. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/INS671500740.
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 0xc3dcc16fc34c424d1289a403db5c58661dd0428735fa9b5dd628256f31b9afc1. 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/INS671500522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2166682d9a4f0b6e406808a8c07647271916b45f57e46ae51998fa57c42214. 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/INS671500524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb0264f046cecb1b2ece9555452346de8b448b4f1156ef998bea37717ee1aec. 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/INS671500525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ba75a5943d365177beb607ccbab1fc62d8b287f94eb69c191d895fe05d2766. 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/INS671500526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0a3762a5e1e57bde3ae9bd0612518f562c79d277791101ab67b5a70fd519ef. 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/INS671500528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c8fdc911b4b4abc67ae1cddd798313b71f85173b2f902fdb10fe54069e25c3. 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/INS671500529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c34cef69b883bca3088d82a4944298bcd301588b2473d2eb81afeff3f154168. 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/INS671500530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fba7bcb4a0517128c5ad6e94e5e61d7c737f733ffeacc3adf40b04b6c71984. 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/INS671500531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf4e90c6259dbb6bdf1407b1ea109299f2d7d9db3fcf415558cf82e133a429b. 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/INS671500532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fdd4bb01bd7c396b76484c06cd87bde0672edd9a4898e199596b1e897b3764. 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/INS671500535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e7e3a90acc474a3f2c7b7c2fb4073826f96f0e615837605aab510a98974e91. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/INS671500536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f22de383b3794b3eee42af71446ac3b350b1d689e44d58861d6e73ebb23deb. 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/INS671500537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a124de2ab2f51d64b29bed9b4674345e00f7ca5914ed37ec3d6fa27ae4c38. 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/INS671500491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69682e8fcc4803d4da9b9e24e037e2119abafd17ccb711a3860429b999e74ac. 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/INS671500493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e1e1430e33e954a6bd3bca4f9d2eefa8981ce328b7ca3b462d14bbb40427f. 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/INS671500497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a164ad331f6660a742e2717e8871c50250b2fdc2db5f21065e0e322a62554. 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/INS671500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05219e630688e039be0ac8b2a09726d1d8b7d2150084f7d772c4d6a9360f41da. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/INS671500492.