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 0x47c74de2a8994cde594aac9d20c02c84d1823c7e5052a0897ddefb2510263a7e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2df288a9-3657-440f-b4c6-70a29af15bb3.json and https://artists.proofprofile.net/proofs/artist/2df288a9-3657-440f-b4c6-70a29af15bb3.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 0x38e860507cbdc9fab41223d51b4d664e14ce8bad3549cfe8e2b07fed3a00fe2e. 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/TCABP1364622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f43d1b7473ab1089fe143b293b78be2bd84b6f03ddb5ce0c2b0ae647899619. 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/TCABP1364625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcc8d862f50de9b0688b0453e33ac51a68d3c9dec6f06854ea159f0d8a6c79b. 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/TCABP1364628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e66ee5a54988470d0e38e4c8c2359a50580c67c297bb3efa24fe908c9d2c25c. 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/TCABP1364629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23fb9d59b55c43e004b9de7c7d91b3a381ed3b5792eb6e51c9e112b2dc92067. 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/TCABP1364636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7f8134279131ad7619ab01c08ebaf45f7f97628a6c1cc0e5b5554f87840a07. 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/TCABP1364637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2c48dbde0354b8bab78be0a4dc6219c33269c63b8b9eb5e74688c86264196. 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/TCABP1364641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aebda8ea893244d85a7efa083638992bd0390a662bd259906b5fb22ade456d6. 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/TCABP1364642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56a8a9f76ec457ac1e1d4b4b80bfb7e44e72f5e6532d7db4cb5129221fc9e4c. 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/TCABP1364645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce0f6fa8b07c54848da175127cfdb9e558274b4743656786720704834692848. 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/TCABP1364650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d801693e436a012cffe2002092a332d5cfe981b74d51c701553c171ef110d. 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/TCABP1364653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f250cd7bc93f5f032f9d64baf729f6552605e5863cf3fd5c99111cfc09df447. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMHK2079478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5b86536845635b85c7fe315f931f37696a0f3f510f7982cb28770abf986399. 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/TCADY1864933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe946d0c4140555695e17b51061d725cb66ca1b5a7751fbf29b98401b99beea31. 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/TCADY1864978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfbbe4976922dc6b5b563984123c41e42b19ce9f51c8cbda31e8c7ed6155d0f. 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/TCADY1865052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdb5642398d7a5c182f7a80cd953c878bdeb9355fa5cfd72fe50ad5ec3cbf90. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADY1864952.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47623c42cefc3149051f1776d79f10ca5c5b5a8e38eabbe2a26d0c4e7cae53c3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCADY1865021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba52743cbebd8c1c8e911910d5ef945253a0ad37b151529c769d90e3d150b4fe. 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/TCADY1875620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c95d0b818a2bea6da32d87c6513e08f21239c46a704e8d3a96024ff1f9883e6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCADY1875624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cd44c46ce6c8904d5b89f69310d9ef4fb603a0d29a578f9e6b5dc83bda60de. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADY1875625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d02e45b025c324279b79bc2a8fb62871e500f858bcaf380506e0b1b5e94ffd. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCADY1875626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbbd0a73a284934bdc26aa4d870df4b032ac941c7091db571b401f29941b7b3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCADY1875627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d3aefdc9a11d37e34d924430675ada2847bf2bc6ae5ea07c55014251a51e2. 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/TCADI1769163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01058eeec12abbc14ce094d211465b81dac6ac9cf2fe1ee426ae628aad4e5a82. 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/TCADI1769169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf759bed1ba21aebb4d09d1d74e84c319d9ee09e70d9da43c22d4123ad946a0ef. 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/TCADI1769171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6198af3a89a9d2859bf92d6daff81cda74168392239948ac5623bf7ff60f9a. 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/TCADI1769181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757ea8df794e11b92d89b082611fcedaa6a400e6693ead790a332c20336dab0f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCADI1769168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbd626b0ad7a9a93141d19e91016704bc24cb8ef67c08aee3105fffcef0b4cf. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCADI1769173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661405dc8f0b2cf945ba504ff0698b31bca31a7bd1901dd38afda26edabe9b2b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCADI1769176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010c7f895e231b48bf3840d4c732792b03629cd57253044a833a97131312afcd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TCADI1769179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c81ef037d70c4f3df0a168b8b4e19d620bc019a2b00ddd6eb67f4f2455d4d05. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TCADI1769183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02aefe2aff7ba3b6c1ed1981c28558c2c50ae67300ad2ff8734eef083011aa3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCADI1769185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d1b3685dd4d60682fbfac1b82066aa96052c0f88145fdc3dd20ab32f500dcc. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TCADI1769188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33635faaf7c8d5e67963f5d3ae1f1bfd164c092ee3d22ab3954f0e3f1a78b3b2. 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/QZMHM2030207.