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 0xab71e29efef57a79b1de472ef673eb08bdbabe14e575bfcd225b448ea91cbe37. 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/ea77c584-775d-4237-92b0-7babecacca79.json and https://artists.proofprofile.net/proofs/artist/ea77c584-775d-4237-92b0-7babecacca79.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 0x6c042afaa633e70a1684326aa56cc0138f9ce458ff13cf527c86e88b49ebb7e9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USJ3V1272295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbeeea51f04a355eded787cb32130e0e874a08a2be36a8d76aff36723e35a5f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJ3V1272296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b3760d34ff03aaf071a12a27d6cd9533ee42fba8c6e272b4c65d5dba7e7c0b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USJ3V1272297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4922f3cbcc3574e6cba00c7be82e16cae69b2e80b7a5842a2f62ec6dcf751fb5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USJ3V1272298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0b44caedc7434011ed9d8751f615edbda238da8e9988b5774fe8129cbbfb9e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USJ3V1272299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf89d63b5bdc0183e5fc31af914a78c4dbe67dc901605bc2605892748975679. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/USJ3V1272300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa95911a27056a628b5aee49616d596e7c8aa87e4072341c65e4f4aff3d921b. 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/USJ3V1272301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56833693c94e0702ed2b9f780277f1af410e7f0f9142193ab7bdc09cf2084ade. 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/USJ3V1377041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5ee4436a1cb944f40b1d96a99644fac5a4b04f1b41624476f342fcedf43260. 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/USJ3V1377043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bf2ba013282ef5c0e07a308cb6f87090dfc1cba3171d737e3ae9ab5df867c1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USJ3V1377044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5714a601d2af0f39bc869aa17745dece1bf5e3c29b07700b0a79dec7a475104c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USJ3V1377045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ed555f5c3e7115f9c645c0c81a57cfe4c2529d79ac19b53c0b5701ad30da8c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:37:58Z), 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/USJ3V1397955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e83802bbcce6fe6a92b5e8e5123da6ec01606a6c89b6e4d6358f57fa5ef6a. 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/USJ3V1397957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8182048994966ca16a06967c5999cda0dc78a2d2e224f39b39eb4e1600cd6b5. 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/CA28K1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd7e51dba2bd0e3f627666608856d64756fe3149c73b5dbfc6b0a1289f0799. 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/QZ6K41901023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddc4a67f3cb778d498fb964742b6f6d34663970fb4679a471c27816b0e3dfc9. 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/CA5KR1552693.
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