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 0xd0ed11c29c70eaca1058ac450dd0749a88d2fd9e19be3f59ec2e694be6aa5be4. 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/4d28cc8a-14a7-4223-b2d0-76e3a633c988.json and https://artists.proofprofile.net/proofs/artist/4d28cc8a-14a7-4223-b2d0-76e3a633c988.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 0x94449816e9ee9a12e26d4c219d7a2cbf09b42506e37b0389abafa210e1d6c690. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN51910206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc993cb5bafd65d928ec7dbf5834d62edfab76e4ad2066e2aa8b4aebdb409e450. 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/QZHN41979709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aa32283309b724eb69b8e42da21113d669849195217773ebdf2b14f81102fc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:23Z), 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/QZNWV2139132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56999730886bf78bcb28022c0b5769ef13d581801c9284306d2dbb8b3d0dc36e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWY2190474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af6d20696ca1e3e06397d7c17b90f5ffc69fad79e389b318c1c28c97240c530. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6P2293279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4135e90eb87fc002e4df0abd5f6b99eb938384b617eee7fcb2fcfab16dfc0744. 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/QZK6K2228412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd028ec00b1fdea225be8aa38eb739f79fc9a6255537fd6482594d6cd9a389bb. 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/QZMEM2242249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc0e45aee2c76bdd36cc4951dcdc969ac3e0baba6e71e013281e8203bcb86e5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:53Z), 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/QZNWV2253916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be84c8b271ddb2649aa0e61a677f2559e23e9ef9e1711757038ba450f3c6c5d. 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/QZTB52206959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5800901b1b9177036db084371eb2582d2ef51ab706efc0b5ecbfdfa39ef91bdc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:46:28Z), 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/QZTB72254764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74955e1a94def2514f8f90f5540506fa3b6455f98186fbc5b0fd1aaadddaaa91. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZFZ62385101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688cf688a64cdb6b20b06db435086ea9b6d117eb3154bc1cfed3df86bfe0c9d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWFE2319696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf66bf1ff6a519b0756cd98cc61b0db9869aff476e271d5b95c597abb52fe24a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:54Z), 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/QZWFS2403106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52916ea07dba82a76a370221ad0a0172f99dccb80ff58be154a30b6a7db2916d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:22Z), 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/QZWFV2466735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdced4b68a11168de5ac9d4bfef18764484e454b9a0cfbfb4bef284589e73d357. 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/QZZ7Q2458039.