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 0x0bd5327e54175e61645505f059be053bafd35c31b565aea12fea9e0252d5f349. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ba6ef3c-44e9-40c6-b731-fc2f87b8dd54.json and https://artists.proofprofile.net/proofs/artist/1ba6ef3c-44e9-40c6-b731-fc2f87b8dd54.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 0xb5c434c7910a18491490996e66a1f7f4403176d71c0afee5bb06c3bce3bc8731. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W11925039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066519dc338e61e138a829a45d7306ef9bc2b23a8e14b3d3240311ea9e7a7539. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:49:07Z), 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/FR9W11925040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7947eb6b2aafe0b42d705dc38ed5ac3679dbe14c804fc296768d68504c73c2b6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W11925044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58bde0d22a8d1bf5f9c5a545ba090d0257858b81bffda7f8223793ff6ddf29a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W11925045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a77b8607a6e23ec74452acf41b973cda16daa9f060cdf2113bf8bee096c07c. 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/DETP62200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec71ad67dc8254993b520ac79eac1e5e97955c4d237f5914cf3c2713873324d. 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/DETP62200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5736465e178a313075336f7ba248d12eb793540eede3a442bcf31f871f12a7. 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/DETP62200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eca8e77d195644260587d55f5da0ef16424408b77c9ed36c20d4ab8c129c96. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:48:38Z), 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/DETP62200011.
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 0xdac52b94f3e257fdc74448124ff52575744d906cbe1795576fcc3fb03d792503. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:34Z), 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/DETP62200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0933891d16b0a7dd77690cde1e1d5b73e166c62fbd8345722587614519c96fff. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:57:38Z), 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/DETP62200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccfb3697097ece8725e90c735722afd2c43b7c3bc3a5f5d6079e4b245339a82. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DETP62200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ddc13689351e673b54105a355727e119b37811ac441e076291e580b7807741. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DETP62200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8e86f81ffe9973a9989e64128f30f39c1e60b4001c7c42e36ee6248c0f64b5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DETP62300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb13dbf7acb1625c7003eb4755c88b08a3245629df8c865ef48b86419ce5ec60. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR5R02401172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295493bcba047119ebd1adbb017dc798c91a54860c26212eb7160cba6c713ab5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR5R02401174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9251bac01bc067067e2e4cda944cf74540267f8659e78eb1932502b8b9db3b96. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR5R02401177.