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 0x482da763b272fb91e8b33ce5fcf3c43bd5dde7385ad09b1d4dabc4e9780ec047. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3610d81b-c016-4b6a-b20e-23ae3b740da3.json and https://artists.proofprofile.net/proofs/artist/3610d81b-c016-4b6a-b20e-23ae3b740da3.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 0x4f1904cf666924bbee504e8e3c6ba1ca81307bce9495a353f0243aeeefb1ebca. 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/QZHNC1961021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fee64083fe952d8a931c7561ff19255519e901c6280273525ca5315e8aaa809. 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/QZHNC1961024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e10cd8aca6cc2320e46e6c9177fc2d10037cec442c71b6163cc572d04f0856. 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/QZHNC1961025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc72b998be62013ffa430feeefa35107c290f111857e9f065eed174ba70a27. 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/QZHNC1961026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea2dd23acf7242a0d1f987f30520d884c56b1867bd6addc44dff66fdb6cb0a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNC1961028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9febbc9bcc0d5c4b73bf6e403739a1d924c8e05f693a7490b95e4e96282de0ae. 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/QZHNC1961029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2b597f22702ce4421972f1a821c88e8f7d907786c455ce132cf8781156d772. 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/QZHNC1961030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40b4112eb4e753fd6be5f7ca0b9122d5be4753b12b96e4e8dc4b9b01aecbfd9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNC1960999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90b089d999371659e911d6dcb6dd59a2cb46ef9dedda272d0ef635e2b078efa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNC1961000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789e97c6a94b2ed0db1a322857bd811f7cff9ddf799e4f36236a11bd6e7196e5. 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/QZHNC1961001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e3ea312f46b124b494c56e207015aa7521da95c0006f34804e4e95f4b6ce05. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNC1961002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4673c6228f11e6c35b6ba98cf47314c6b8afe9dfedc23555624d0ca90c2ad6. 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/QZHNC1961006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301b6087cff5a3ce4722f8145dd0c497b763adffc9d3bdc5c6b36ff238097aa5. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHNC1961044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd9cde495b8fd059260422c6f9f0e0f6bf1cfde044ed31be493955e1396bea. 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/QZHNC1961045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508ab4aaf376547acbc3f2d9dc6e1b4707d9e05fc645a522290f1d839f4d6f61. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHNC1961050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b71ded3bb4b89b5a5add340f295344a3354702e6954718155d9b918cbcdc8e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNC1961012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabb2212b84a76275b8f92617c2fd1f47ca41f1bd65147cd327904ab12b260c3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC1961016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed76a4ed2cf2ae313fd9a63e5e339ff5af3613299f3b23aae25fe62f7ba475f1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNC1960003.