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 0x8749b9dc791e065ed72de79135bf979dfe185bd6b34534abef53f75f38a0eeb9. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13882d78-b722-4d92-ad7b-59df13d54b56.json and https://artists.proofprofile.net/proofs/artist/13882d78-b722-4d92-ad7b-59df13d54b56.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 0xf5a5164de70346d5b3b6f5926a972135706c673d077448705583fcef55007c78. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5AB2434219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165b042ccaf7e98287212c006ccde0a7438ef98ae622603b1d7b1d8baf2798cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5AB2434222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3348ea4c81b128fac028eaabae19c51735d995dd57e047b7341d437de38aaa7b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZW9M2379549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2432c1654a392efc1a4737517aac5cac7ac0bd70c068bb3d562a9b6f2201a975. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ5AB2434220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6332961571ec13f360e525b75246d1e18811ea8f5c0a0f3fbf7b2b2e388fc68. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZ5AB2434221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efdf132fad3818121beb4333b6a574a46b35de42a06bf69afdd59e15358fad0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD51968409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a635c36689ca8e84614a7d23c4f7219f2286208272b2ecda5daeeb6c9e556a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD51968413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280b9d3d36dbd3eca03085f4f6d7ead34ddc2a4de9dc2dae41b14cda614d570a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD51968291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6639afa0db00226c0172f6117237471ccbdedd96402e41ad4ff2b76c3a2cd92. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMGR32050751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ece1a634555bc542e4ff4d4d7cc3e7873fa346d52935df96feb34336256f5af. 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/QMGR32054850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c46195c96a45de94d2403027d1c59fd56d98e0ad7a29c86971df1e06726336. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMGR32054910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261165ee44993219782fa55f23ca250445422336c986ff3276dde6994f0cc6a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMGR32054951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea37766359c43008d58188030f88aee78b41fd148eca20f06815836a8e43685. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA011855083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf352fc92157fe7e6d7d89a00fa33492bc5a4e4283cefcdcf1c9fd7f36eeff8b9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ESA011855088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc11b9b18dcdf484a93e765db3254e75848886938924539533b84f3091bdad46. 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/ESA011955242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8bde71d0e90bf8954fb2126e1969ed9c7bb4846a6b62a7105b4017614495fb. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ESA011955239.