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 0x58de31a8a794b36716b2544f3b5c71bed7ae75216573de9e7c860c3f113b08e1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/642203b8-5e4a-43f5-a84f-c6d0a31ec280.json and https://artists.proofprofile.net/proofs/artist/642203b8-5e4a-43f5-a84f-c6d0a31ec280.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 0x71535249d50f4793fe3b51ae66138e61e873a92e5545a510b157a287d8c90e52. 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/SE5Q52002527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3601a375c88645ad8c08bdcc228654aba2218e38161f37dd9df6fd8ee62f1d8b. 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/SE5Q52002499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfdc37a46364d2879b7d330d9e7af12114d7422ed80b5c68d772db91729dc74. 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/SE5Q52002505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2e194e35e6a302f5d2424c5b53dd8472b434aad1b839c292a078cf75a227da. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE5Q52004047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb75b987b992e3ea345ed6f0598cc3edb2e242630e3777986843fb6b6335172f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5Q52003753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cdbcbbd5ccfdf7f567b636cf2bf0799099a84837d7e47319142bdb10fe7433. 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/SE5Q52003761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa167fe394ca444bdd20e2b3497059789b61e2493ec287dd5d8b97613ac9a99f8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:36:09Z), 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/SE5Q52100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c378ba2fb8fa8e568ff4883fe1c614e7788280ff8329db60aa46201e87aafb2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:33Z), 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/SE5Q52003879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3966a6ccdc782c4af7991f392f0063f0ff4411251011eb84efe5569a801bf0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE5Q52102445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea42945bb7c6835b42cdd2bf39c0e88071e458bacc2eb1cc8dedfe1d5d6131d. 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/SE5Q52301439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4492cc90881ef6e3fc5e86f03828273d9270c0a0fd166418146a5319ef7fb5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE5Q52301066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76a03c043a2aa097b472f8ce91135d15bd9f437bc79d40d24fd17faa74d56d7. 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/SE5Q52302445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499e09ec34329050717898a81f90c0101c64c06061a6e7a0b46aef46ea1222e1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SE5Q52302446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f27bfac56a151cdfcb51db5f8944a3a325cf265af26ed0c32b2398686955e4. 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/SE5Q52303128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbc28aac5f618e0c02ab4d468dfe023630deea046ea7637ac57261c61ada3e4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:00:21Z), 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/SE5Q52304445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af9724a871d6daa81484e4f015699e46c577518916c1b69912c74828de17143. 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/SE5Q52501450.