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 0x70e53e0deb23344f07c70c433887a178c083bbc4b817ea23d6c784a0cdb495ee. 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/96674f04-94a7-454d-a00d-d3e154fb2ddd.json and https://artists.proofprofile.net/proofs/artist/96674f04-94a7-454d-a00d-d3e154fb2ddd.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 0xac439807434efdedf5eb524d223a4837eecde0bc960bb740506cb4af46a08953. 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/QZWFF2392056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ca96b5deb9e5bebc0c564b8969283bebbaa14e07002b2721b2e8d685967ad3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMEN2434887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc45e6d14bba8f8e6ebc9aa3370b680335ec4c944df3f3c3df8e4e92a7abed6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZMEN2434888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058d298469e783799958ea220407eb4517fae7f33c9e7d3f9f2e6645d52f893a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEN2434890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9779b0b70c88ac9a7ce78848db6af875e15e7830cc231e24ef4bf5a824d5e4d3. 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/QZMEN2434892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b78d199caec1b764ef66abe0cd664836324099b156c70c78b26b1ab4122fed. 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/QZMEN2434893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83b8c72c7523668f10dbcc544e1e10fe5e482bf332f81c77508e1179ecdea58. 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/QZMEN2434894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd693be15f09e541d0f7f77cb34c6b4b1fb7e57a67e01e7a424e76628a234fc54. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEN2434896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab075a9cdbf7dc4b69ebe7b1cf29c787fae1e9ebba7727d59e39c0d4ddf6039. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEP2446400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec860fb6765254f0fdd3bd75d9bbc1b0e0e80c6ffc732b38a6506d74daf3a34. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZMEP2446401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3247719f79a9f5df7edab2b0d4f03481fad74b4174c944a047f17ddc1bbe28b. 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/QZMEP2446404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fc3e12c8649f9ec8f1d337ac9652479ce5965901b1125c5da4b1e09b8389bf. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMEP2446406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb4baeffa8ae298e9a5254ccb2475d150b1ae3281a1a8e9e43a5dd15558f998. 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/QZMEP2446407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681213d4cf99508769e6d226d74208af83b5953aaf6c35dce60089d13a37bd27. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZMEP2446408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3ede3fb3e1d925f67df05d3c92c0942d241ee30d9fae05d93f50d95401e69e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZMEP2446409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2623028864a073063f779a01347f5e2d8e3c152c6c5410ca2815aaa880150b28. 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/QZMEP2446410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc4e6664dc29f6aeb9b307948cc09e4e35b679212cb500e5c6d094a838f746. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTB92455567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51768b22860235616848df56e40db2c1e7433b67845f03bdeb3aa4f0d58f2e87. 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/QZTB92455572.