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 0x8066018b927def3cf058dfe2a9795a65bf6d25cead6901630557d27460f5d4ac. 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/14ae8991-592b-4a08-8a28-9262d82223fb.json and https://artists.proofprofile.net/proofs/artist/14ae8991-592b-4a08-8a28-9262d82223fb.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 0x4b2884983d793e25f5805e28836782dfef82c83b84ff403eb44d30f41aba5483. 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/FRIDO2314429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332cc52b51fc4bc85a2a380c6d82db06adc15fdd5b961b44e99effa92aecd38. 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/FRIDO2211826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d16936baf1f08d9a404c1c747dfc0ec9e4d51c7e64d640a02e8d76d86d54a39. 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/CA5KR2371289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6638df4bc66113c80772576b04d7b0f910ac168d3c32ba4d7662164389beb8. 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/CA5KR2325929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e27efc140fcc7f1f327eb7ef66dfa4fe63f8394b734ee77cddf0a09b576fc7c. 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/CA5KR2325930.
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 0x2c95139dabb4cd90d130a98475ca47b563b90454e331f417fb975bec6d9c6d8e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CA5KR2310268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d3496e4a542b7edf478702964ddc6faf057157a1301cc6410a7acee6d4d9b2. 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/CA5KR2459535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b43fd4687d5c9be7ab86c990caa3bc56e915bb6570cabf35d5ed29d06caba6e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRIDO2411277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3089c81d3ebdddb71fbdf773554474bf79859293bf458d34cebf1d6013a9978c. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FRIDO2411278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7031cd8e9d8c69131c8abfc24b3e7581c086b4e234e629a7c16a90298a33ca21. 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/FRIDO2313296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef10a3ac2014bdad3cc0fb8b395f46227239ea7e235b6de8f6d1d74c20b8b0da. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRIDO2313295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cda7a3e49e9d270ba81f101064179eeb623d41b14ce007342b5179ca5bc70fb. 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/GBKQU2333876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b37354e57599c61c43a08a3cbfc448205da86fc48f17106e7aa74789910de. 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/CA5KR2305674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8170b61b551b2a2214b5e96c2669d3e9752e41bc9b05f4798045f07c1ad882a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR2305673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c5e0b5b942d7d506dea5ffa92479584ec6b0c8ae31aade47d0f3ef61f99666. 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/QZTRX2297197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e355f5372b7e2f4fa39dd79b77b1877e02ed00938c477a52d3dc4fdf930a1fe. 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/GB8KE2163121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20bb126c9857fe5138404b8a76226a6b3410d1a01dae9ec3943d9324f2024df. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB8KE2163120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebd2df83f1890c5c75a62c0b2752a3a5b1b9cdd124df461150b95c0d36ab741. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBRD52100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889c302db2bb55d6b887a0bde494cdd61981dcef56d44f4c1e78a662bd38a349. 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/GBRD52100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa65eaea4e2a5207f3683478bf2d56ca17df3f59924288c7eeef0dc49cedc1f4. 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/CA5KR2104953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1084d1756946177cc0eea11b0a76a14d9094e013afa1059d3d51270dd34111. 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/CA5KR2104954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236210f12873a9537b382bb605f9abd057e6cd0eb8544846a84de9fe728f6c78. 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/FRIDO2011804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286cf35d22f487d655e0f4a362ea058f58d785a6f00c0315cc51680fe5327e29. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRIDO2011800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d67df0c22e71bfc1c115dd1aaf28c38b633fbd2844282669df5d3def25ea52e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRIDO2011803.