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 0x5e53d63af8ce7c796541e60e24f7ff2a2720a15a38d13a26a67f3ced10bed6a4. 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/0b2b046b-919d-4e1c-94b4-d98ad344b11c.json and https://artists.proofprofile.net/proofs/artist/0b2b046b-919d-4e1c-94b4-d98ad344b11c.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 0x34362f22090d6025abd1a462c2b414868841de7ec6ad3a0267aea3e506063b5c. 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/GB8KE2053051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80186ef8852ebd3bd66445f0fa5dec1087d04e9ef269f9f99a2f39b45c86edbe. 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/GB8KE1954742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1da08cc22dac7a8311d804748a101578cc97728e62db89f4faf7562170833fe. 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/GB8KE2309454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17bf1f445d28177a98c792ade5e5bc1ef2d0952b23102ee1a9815146eb00dcc. 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/GB8KE2309455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd859d9fe53f52c7c985c9d65cf1b54a2380f94375002c43e06ad128a2bcdc. 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/GBDMM1800223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a41f11582d7d8f1ba64abeacec6ee87a8852b0e812a36abacc4e047fd56bbe. 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/GBDMM1800225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c65f44507b01364e4a6ced0650da9efb367daf7fc156dcbc9577505735de2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBDMM1800222.
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 0xecb9559b9828c4865827523960d08d1c150e6ef795769d89aa5bce24ca669bcb. 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/GBDMM1800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b731cdbf9375f12a208d4f149d4728aa2c17994a190701f6d1ecbc7fdc648b. 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/GBKQU2104344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059d93144f1e54543c93332684a26ca7b2301ec032243df0c55796cf1fc7a094. 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/GBKQU2104346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe852553aa7a959e4828d6183fb302fb481930e7dd27063c938641a5c0315bfc2. 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/GBKQU2104345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14607a220ba811fae5a80791568195da0545cef09062362cc707f83c705a7056. 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/GBKQU2104347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7ea8fc6100cd9766aeab47d4226658d0f757246c986923d9df28bb73633918. 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/GBDMM1800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab5a77561c9fe53f7f1d9ad929dfe656ce6623378a09009de9db7498f2f0da1. 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/GBDMM1800149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1851112972127a181dfe0e278c90b2467030927337eb41c3dea270285e81ae6c. 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/GBDMM1800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d0c83139a58ac8934f4aab9a88175fde3e6f49ea6b4123d3c7af78ef23c846. 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/GBDMM1800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fe075d2883b60f5efa6c7f4bc65482c916c93c590f9d43a31cf6f0cd0506c4. 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/GBXWN1900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4b18db3c756fe6c8892ad28d8c4951cbef84c81e059d7b66f18956a48690d4. 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/GB8KE1951832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201d5a3a609e2be9a7324803c5d0dd12825f35ad73c86bb6fd9a6316119ddacd. 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/GB8KE1951833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f95beebe69215e445dc169521ed20e6263c4d12b4500a16eaa48e091f690f7. 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/GB8KE1951834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109324138ea83eeab7e1f03a9741f3b6918b55a1c3fb0545755831c167fa4cd2. 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/GBXWN1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19ebde171ed8a53dfbf73cef7e590fa04ade0f8527a715c2d4090d6f3f467d9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBXWN1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaade72d1297d1282af886fb799799bbd31007add276db2ad7714c5b9cc92b8b. 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/GB8KE1550667.