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 0x292cd65d60a2317b0600a047017444393140525d690d928307a6e5ac24625f30. 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/83dcfa99-124a-44d6-85c5-141d5798cf43.json and https://artists.proofprofile.net/proofs/artist/83dcfa99-124a-44d6-85c5-141d5798cf43.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 0x902b22e29ed0f5f39ca1d9cdcb1622d0e2d900320836b687ab9596d236c45cd0. 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/FR5LO1871001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d74fd9a15775f61ffd6f9203a6c90ceedff813acd08112754ec7bc78253fa5c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:57Z), 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/TCAEC1996967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2061c349ece4dfe0c5bc3202c2b2be80f6c6c33e24ad7a4b1632c14485a8bd4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TW2518018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbb26d5647531d4d0e3459702222379221441c955d85ed4b13203a84ed76e03. 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/QM4TW2506947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1303166c816c2f53890688130d132b802927c0cb36d105fb85584a94839b3239. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:06:38Z), 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/FR9W12124606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70d960b1b9c811d89473876f4cfbf7036afda710cf7d428aa47f10b4d18d0c1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR9W12147943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3ae39eb82c11e1ab10abdcfefd940579bf4e748a062822dadcedbb7122530d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR9W12228064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1afad3bb498e636cace26c327a6f855d90df89b1e05bec5f5725ba1c3da5ef. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W12238476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6936211eee7e30aabeae1e6c31b83f1494e1e19caf35f73d08ed228833eff8. 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/FR9W12233541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd858b032507e783d4394f00f815693f747aba3b5026421d19939661361ea52d8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR9W12134202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1afad3bb498e636cace26c327a6f855d90df89b1e05bec5f5725ba1c3da5ef. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:19:15Z), 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/FR9W12238476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3ae39eb82c11e1ab10abdcfefd940579bf4e748a062822dadcedbb7122530d. 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/FR9W12228064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558983e488998db5cb38b352b0701583a7e7efc09a2413d9c8893b7ee08b633b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:42Z), 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/QM4TW2506971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60caaeefd2c5912afa48ea6d2faf36a230500e8ba70716a3440208a15f5a8be2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:58:12Z), 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/QM6P42589929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf66daccadecef6a977ebacfec65d2208c4050a3339331cc1dc89f0a27fd1979. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12546836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02701ae74b032556a21ae8b22d38748fc5320388579382679eaedbff6ea0ab93. 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/FR9W12546685.