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 0xefc458308747ff1341e68da1d9b1e1d5fc3406887396bf484983b7ac5f00efc9. 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/f34396df-0f8f-4c91-a016-33e58b791d2c.json and https://artists.proofprofile.net/proofs/artist/f34396df-0f8f-4c91-a016-33e58b791d2c.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 0x3c0df89001a4f2d88cce941a99fcbdb09f1bdaf5bee430d5729b96415c562c96. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM21617376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357f4204dd6c1aed59e7bdf84331c2db6ccc877a3e33a51b7829b9753f1186ea. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHM21617377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce64c9c8688bfd4344eea6a26079f8d44d34c0f5b356367a2b4bc281869332. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:40:03Z), 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/USHM21617378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbff531e03177352ab51c0801388420ec224061894871243c722ab300593f4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:20Z), 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/USHM21617379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a07a447e5472f949698ac2b1b2614b07a54d47289d76f8998512865d589907. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBVTT1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1489b4d7dd6969841b372bc2baa2699eae8b480a95efabf8c2f05a6ec9aec. 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/GBVTT1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b429e6c3548ed6e2ec5028e6af61afe678c8d17133af4302c48ffb636816ac. 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/GBVTT1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb409de0a1c2cf61d4cec91b26ce5b0c3c5ffb709c1c089ecc1c6c0bf6c6ca241. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBVTT1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee7f67faa8a0086f41069e07c8ffa11582cc8f5f45f49940e669da6bd00f7d8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBVTT1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f30f0680efc117b04f2986c3113ab4ef076c19c2b22fba3b1de0cdd4cc9119. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GBVTT1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99165fe4072bd34a591b19b7190bfea60990705e8d435c77952cc28f088d23ee. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:49Z), 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/GBVTT1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2ccf2a096a2846f957bbd30c8781725ec4ada2e3e7712011e22698d169054d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBVTT1100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93d2cfc83ef636f2d1702092db9413214ad9f869d2ce004521a341a1a7592fb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBVTT1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddfca1beaf7ea798ff2676e78308ced34622e74ca73fae179cb0f38c3accc83. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBVTT1100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45cc0a100ec12b08c642d89d28b21ceeaa5c41f49b5209717956c17c85c8b42. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBVTT1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1846f809118bfc2730bc2a5beb302d41731919db68d035756ee47cbbf04069. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBVTT1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075affbff7d10378dceedba93904e61690bd1469b7fe05d6cab64c325df410ff. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:44:02Z), 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/GBVTT1100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f231662b9f1ada7efdca59144386e2dd6eb6738d67e4e3bf08646f3753d8c1b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBVTT1100021.