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 0x81a6900e8f121bfd9afbc6916862f18a90b635b550d1d7d7c08c2c8095da522a. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/320f2f84-69d6-4a72-bb67-de2e3edad886.json and https://artists.proofprofile.net/proofs/artist/320f2f84-69d6-4a72-bb67-de2e3edad886.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 0x4bb96aaae29eb537e58d75c528544497136447854fcfc75dc601e46cd9668fdf. 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/QM4TX2259671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13618d01f30f1ed2c0ff418b14e9c1b8ced10545cc7fdd27c33109bda6862d4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:49:46Z), 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/QMDA72464224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b3e3254b8ac85922b3bbd82cda448b01bf2f5c0c225403c29cd5d7cdce2f1. 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/QMDA72464225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a44255cb0c5f6d8a095a494dd47e2645d57fe41df981365cdb511ac05252597. 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/QMDA72464226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27388d34c0cb1f56bb695b97762bc952487222b7ba44a6bb16c17382de06014c. 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/QMDA72464227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a03f063de2a66fd3c1fee2900d13f8b008ede0f03d0b8becd3beb277ecbcf07. 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/QMDA72464228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565217cc5b0182d060c2b8a23ed3679fcb205dc5dd56131edec2851dfc2b4946. 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/QMDA72464229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eda1927bb57e3a3b0123cf478db2547f9e7f5c4e312854ed977dee05928488a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QMDA72464230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04231785fbae6c04a8133fbda31b92552bebf2d6d010e1308257b33fb5d6ba55. 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/QMDA72464231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab582a685850ee4c1347a2a8706f4fbc68b138d22f9b1f54d28059e4aaa2b7b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA72464232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9251cafab207d5dfe35af52afa4ad818ebe55de862cec5bfa72439d69478cd6. 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/USY252421104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3079f2599614b6be94a6bebc15b0aa1294ec6fc11a1722e2f4408a58a83adb. 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/USY252421106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47a639f451757737707886dec26c9943b567ed2eafe3ecbcf34a25fa949259c. 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/USY252421107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bdf805090843446a1750c001c2f1165b05d58c85fc96821901a0270053efc3. 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/USY252421110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb0dd92870ae74c7eb139add1f029b73108875941eafc91d4551b4f9e64920. 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/USY252421111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d50e803a2faaf24bfbbc420e3f8b7f16cf215573a462d62aead9202ec223ffb. 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/USY252421112.