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 0x93d4bacbf0003a516328e5e473ecb06358dc9a0a05c1d82efcd183d149f0888c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/516f744f-1f5e-4623-a694-76048ecbcb52.json and https://artists.proofprofile.net/proofs/artist/516f744f-1f5e-4623-a694-76048ecbcb52.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 0xfffa771b32e1d048e5ca95026c6d6d90cd843bec0361aa3f8f8da96e79055007. 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/QMANG2205206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c07b364c212ca1beb4f81cdf1a7ec00bf65ac6ee87de43a2ad27336df6f2145. 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/QMANG2205213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d28667cab88900ca361b2b9bafe6c048d07a5ef69c25908f26bf13d06eb090. 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/QMANG2205214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8cc61260e24de823002defaa909dcdb7b80e594cfb0780a5733a29adcce54b. 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/QMANG2205217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fee730edc119d1e244e876d605a6344ed9184fd1eacd0bd2793ceb3de4acbf6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMANG2205207.
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 0xc22347e8214154687fa3ce78709f3e1b3cf83e954a0553b1ba542ee13b7d4086. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMANG2205210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bf6c64f254740d7880e800c83525f5351576338fa3b61486b6fdb8f1e90dec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMANG2205209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbd2a622912e567c860298faf3e338165fea51543fcafeefe6de258150e8385. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMANG2205216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf508bd77e83703dcf2205d85ddd8f8566da2c91240f40b85a2c99717e80adbc5. 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/UKR6V2310633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86ef7307a518845490ded59e6aa921172123bf2b385bef12b515fa77bb51f1f. 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/UKR6V2310637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8df5dd890c8a62a75fa9962eb0e2bca84076b7cf9ca0e53dd75cc478c12d9c. 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/UKR6V2310638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc132b3db080420557dfac3617d4dd8266faecc4798d765054c71708659465055. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:28:00Z), 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/UKR6V2310639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f6e9b4bbf01211066859c9454c5608ff5fa96c820a3b7eeeaa75e0b0e6bc27. 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/UKR6V2310641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1018c0a0dba4e969cd037d8894d806af0d5279e60cf3d234797ccae705cca41d. 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/UKR6V2310632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfce8a7e4fe618c4abb4b86983553a19c0c9df229f52eb8f61b0d3daf355424. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/UKR6V2310634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e17efa15ca2f72ce8639332ce8541f84a71da7b686a2df7b87c7af661de570e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/UKR6V2310635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d4b63186e67ca08250b8ad638f67338ec512bf27eea1d43d9b4e7a0579f42. 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/QZMHN2395105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a4a45ba939e2687e133bc42abd9b9a7558c6e795ebedea9bc40167f0619b3b. 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/QZS642358895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d30ab63bb32ca61676ba62bda37d57d9fd1287b53521d7bef56fd5f2bea7c. 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/QZS652369670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0a4ce91aa503d4b2ee7831e781a90104f0907e99460660d808484417772f62. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMHK2309599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d131fbc96373eb4a0d3e1c23dab535aac19028a31ac998ac071f365002a33e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZMHM2356101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a204d3ab4c4fb1931f11142fd0b2ef630546a5c6c09f09b5383fbaa4424bd2. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZMHL2304326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da68f8c1cb64bc9e8d67a71935131c2d8d279264d28e1891d04a95be04cb0ef. 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/QZMHK2255922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a763ba4b20977401c8d227287bd970de4fe314961294a9da088d569bb9ba501. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZMHM2245019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dedf21a7dc5c7a76e5c02f60351c9f428f83ee5ca694b74045f3183ccd33ad8. 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/SE6TI2163213.