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 0x68fcf142a48b179bcfd18c5f4d0f64757eac5b77eec67b7248b5cc29100b99f4. 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/81e692be-5bb1-47cc-b858-f0f57463f270.json and https://artists.proofprofile.net/proofs/artist/81e692be-5bb1-47cc-b858-f0f57463f270.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 0xcbf7fed589204fb6565d83b44ed0ce49381f8c75a3ead4f489d35b65789db2bc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:59Z), 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/QZ9H31700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc28d4bede235f38a67d588b40e5b4b62d6ea95393372e6466cf5a92b68a6027. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:44Z), 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/QMSEJ1400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dd5a998da54ad1b5b403f0fe502f513505879617d898906748e55dd379120f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QMSEJ1400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651d834a77502abce1b2478aef0f92575f36c30a39522b4ebd8749e99e2df89. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:29Z), 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/QMSEJ1400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d87b4a6cf8680773b35198079960e9f05e93e125d515ca82015f8fc760cea58. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ9H31800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6d12e773570d2c0c25853138c70cfe0b27952a1029a0bd7837c9d76b28da73. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZ9H32200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca8994903c8a0b0d412c10e1f4a1817b053db7582d56c8956ef7d7a04f4887e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:16Z), 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/TCACN1609248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6e6be48172b415ae94bfd1d1edecc3ab5e15f67fdf52b9e22af0a38fe17e9b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCACM1617288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eabec38028826b3c987195e5a2e6b3e0351e3bacec5cabc3e98e1379c4d9c2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:04:53Z), 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/QZ9H32400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ae18b4a51b166f1e916911bb0783a2d00e22930eca5650c60bda2abc1aefb. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:41:38Z), 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/QZ9H32400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559e00980cfc757d55a62ec134de6be9aca47ac30b21490e7b6b5f3b7b6af335. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:52:09Z), 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/QZ9H32500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32205d636801c99d2d69bfc3ca9ad55f719a9cdb858b97342f4ab47fe6973467. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZ9H32500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca078b8a132b93d48e7cf2e4ed9f49fcdafd4b79b9f8c4c2050717673b134c5. 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/QZ9H32400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ae18b4a51b166f1e916911bb0783a2d00e22930eca5650c60bda2abc1aefb. 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/QZ9H32400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed36903dcc2a1ff905ca26d7d760b7654c31b93c26aa102b7589c0e80f362d72. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ9H32500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853542cba7d8ef708d3c9332ed0ba47ab4323e4f2f7deeddb3f198037c022319. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ9H32500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65cc6fc84146cb5ab9805f6ca9ba62edb6f2f0ca3ede4dc2cb8a10f92a0b268. 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/QZ9H32500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559e00980cfc757d55a62ec134de6be9aca47ac30b21490e7b6b5f3b7b6af335. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZ9H32500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b8fec8c92d84fbdbeda5cd90ecc94578600087ee682544808caa27922eab67. 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/QZ9H32500008.