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 0x1df7cbd9cd8a4335ce416637dd715bdc1505c5cdd4c71cf65139a1754c0ef3de. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/403861bb-86b3-424e-af52-eeb4f9d6a3fa.json and https://artists.proofprofile.net/proofs/artist/403861bb-86b3-424e-af52-eeb4f9d6a3fa.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 0xa7e888cf29dca70d1d1876f10cb5ef8510fae25034616fc38c52e75a0a8e0ce4. 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/QZES82116026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb66317ba3abdd8f99f0e0cd53d15fdc4d279c9bbf6bbe1657734ef8207f348a. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZES82116027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c82862e4bf57174b16cd512985d8196801e2b006e0530194ceb76ba738ba4. 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/QZES82116028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cca2bf60dd1e8870b9b7a5ae630a4a526e37e75734ec79fe50aa2ccb867cd4. 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/QZES82116029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c182574310e5910f8e72fa23d0bdb2f9f4ef075512377ec96812c0ad1a7dda. 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/QZES82116030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c1c3caa53f51e3cb656c31fb061c61e0646c07ac74aaf138fbcc1c5f5a7a3a. 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/QZES82116031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607bb09822c5853274d2e35a937e31f42dfb72d1724b2c47ad55b53607e7c921. 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/QZES82116032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0718f670438e63d65398a37a9374bc3c3a1b766d3dcde464ea149c374eb2fcdd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:29:55Z), 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/QZES82116033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb4a0db894f9175fa725a29c4a277a3effd00af1437659bd9c9ca367786cdba. 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/QZES82116034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df0d8ae94be291220845094612d5f91d0813aa4eaa95f268e5f9e8e73e8ff55. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWR2498005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f9d604935f8e9a9ab32a187ed49281947fab9a7449b169cb529a7ffb81e87d. 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/QZRP42487032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689a9c2f3ccebfb2be685b42eb98ec74d2df50d4b6f2b79a5b47fc0e8968a9cc. 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/QZTBB2482388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46622b2ce63a5c80141e0b99b60be397cb48e7085ef008278b67636971c366a0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFH2477069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408bebca7c0ff212885ce2061a4a1cc14dc762205bba1bd92e541f574fe6b414. 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/QZWFJ2498603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05936b53201ff8195c7421651ecedcb40e4c410d8912a8f47bd8848a6d2457e0. 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/QZZ7L2428336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879860559fec8cc996d788f147c75483298ba559ec9a2f1f8ed50257809d210d. 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/QZZ7L2428337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cffae003d1b148405a5eaa732f7e28f13bb954c167bd4b9b48d26c4bf9833c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7L2428338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab93a64f49d59edd8127413e689f44b90ff1acd8f83ae39580df6f128567ae84. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:09Z), 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/QZZ7L2428339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f5ce513b6e359e2ef1ae2834cbec429a9c1962021f4df0bd9c085e1ea576e1. 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/QZZ7U2425518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ee08b046672878b5e25e6288be901e51cca6c63bdd9b7467ac0edfa53b3fbe. 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/QZZ7U2425519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa969fbe8df67adc94349d272537ee162325f45245978662b2e8f0fbf1be94374. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ7U2425521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b1739c3a2bfa7a1dc0554c5567e88e892ebe8c0b6691223d04c2f96a2763dc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7U2425522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10e6f51cd63813793ba3c228659a8a034d01a702fd5ca442c61189831df3b5c. 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/QZHN82559286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ef9a609e9f2d6c7f6a4e66546f111d80d00b6432048aa68a9763dcc2decc8c. 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/QZHN82536382.