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 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 0x3031422ae06e8466985a13a999ee7010f206f3ce9cbd86e02244e9142bf505f2. 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/814d0cfb-54f0-435e-a99f-ec84a4a0c0d4.json and https://artists.proofprofile.net/proofs/artist/814d0cfb-54f0-435e-a99f-ec84a4a0c0d4.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 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 0x9d15427693f288c55811e4146a0d950381b92859eb4c9ff8f02e7786143200b1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA092326024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0958e2565251c08cb93214dde5b43d95bb17b827c9aae44e0149dcb584236f55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA092326025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe5783c78b3b288b1a50262cb28d1a32a0d2d8ecb7cf8518d5f23f0f2882465. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA0L2350753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f385e69b1499942dee5fae6052f708f3a94aea85684c6f0e8a381f7051a75. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DGA0Q2325197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4f5edf609b430197f68604435f834238d7f34c47f92f3f9d010e9ce80222c5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FR10S2400509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd633e8b0b2d473613188e7a59c31e9e56d43c43cc4fcc6d70e17bd376e9c0cc2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR10S2428668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233005a42a5b9deb85aab94b08a984abc65597f64a16b22f7657b66ae3b60fc9. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/FR10S2428669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a19a0160426577d19275278a4a9b42b0bdcb1512a92546e343b9c74458a1d35. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR10S2428670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e37ee5866f5691f4157a3aafceed95a6d9634bb5c9568ac633da211a7a505f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTL92495779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f128eac45830292a6058577d4cbce935682459308434ae2a46f9f4a70143b3a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FRX452481179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42c1d72e653a80a1ede34b20630c80314737cf2f5dfbd055277b682f5e5773. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX452481193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93cd6d040521dc059c3edf693ee2c92fa1369ce6753a246ca17c085b6166541. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX762466771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66c60188c6cac590fc33a931166a8bb01874b7c461744d3dc49557e672d6394. 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/FRX762466772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6558084c892cbd2787a2abe98a8f8c723d62bc1c1626b10c7cf4568d5c83f486. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DGA0M2371519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e49b4000135c5767b3c33430c1e3a67d0c44e2cb2409b88c9f6f4886ac48046. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DGA0Q2487118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb3ba3526beb1b2bb7fe71d19697f2bf044e06b18f98e36439454d7cc0e6cd5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0Q2487120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8bffaae5f9baf6f8c16695498b8748dcaa4778fabada12fb3099d0a4593655. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DGA0R2421903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22740fa401d82b6e856442b0da5513674e52fb3ef6e39f62daccb492b78e69c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DGA0R2421905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86944c4f56307a405959a20bcea0d7bb0cd731b3bb5858e273738319e8966809. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/DGA0S2412042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dff69cd645b78e25b7cdd4bb22ba93ecd97cfc1b1c3948d432b3efc62ea9d6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DGA0S2412043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b005572cd149ea1510d8a6d615e664b6259df13651117c09994d6d7272ec9ba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0S2412044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e66c285c6f2be0989f90e5e49b143b7165a10f37edb36a81e68471bf42687cf. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DGA0S2412045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88751208a19170c2a574a2ddccd7f48a52703f76b4a9cd3f6ce192c4b63c62db. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR10S2507930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963361659b789e2f184974ecc1830a507b2e1d0a70be19ee2c756104b964bfa2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR10S2507932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d0b47c09173478356d6b786d87c74f49e9f4e8068f1fa882d4d997e5fea016. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRX282589505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50df5cbbf38cad7245d86b6fa76b010c668238d07a0aa84331985d30f6810b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452564489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00b89aa9da2576caf0f61b5b784ad03fd0041d1bbc7e1302526f305a57ccf96. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/FRX452564490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888470143437c8e6ee152ba8ec6c28270f603e9047442f6d80b0959838b9566c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT5M22516714.