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 0x1fbcea74081db2926078104cd9c3bdf2ab0c1d6fd787209cad5143c0f9605dc1. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40b83c06-81e3-4b3b-a9ef-db58b29d5fb5.json and https://artists.proofprofile.net/proofs/artist/40b83c06-81e3-4b3b-a9ef-db58b29d5fb5.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 0x1fce6cf935235b820a6a2c5122fac9531732648607267e6f6383a6f06ac0352e. 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/US7VG2408120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95fddb804cd6e59d1cd8184f47124a9a21db6f287892392583ff0c5beaafeb3. 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/US7VG2408122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f29d04ed00ffca28843d0106b0d4fdcda7b273206a3827a58dcca4248ea701. 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/US7VG2408125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2491ff59cfc1a930d837094982b26382250b3222b433f45ba5e7db165f5983a. 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/US7VG2408127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c394d1a357dbe8d28a4132de43546a48f2ef0cd895a3651c08189b24f7eed1. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US7VG2408119.
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 0x94cd158bfaa7e90f81ea6ddbd09ff93281fcb00f685b0b5d0ac9cb29baed4003. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US7VG2408121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce10cac5124720892079efd2be96814712851edb9be8f720adb7219d27bdc9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US7VG2408123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188e8b3dc6ec78a53b411f406a2fa43968e1b777f104e1548f9ef59ecfd83437. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/US7VG2408124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6109968808bbef3bc19ae502647d5a9141f6bad066012151d6afbda0d58b41fc. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US7VG2408126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd88d8b0c6ec4b876723e87ddf7b5d5f3bcbded5922efab6494599c2a6d31cc6. 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/US7VG2408128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029975a0a2b94f0248b17848b354b430df6024b79cd4d847e4d2f86471ceaf14. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZNJZ2210905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a0b87a9fdf8507a83944d812efa45ccf16a390936e0df76ca347e4a586e34a. 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/QZNJZ2210906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d550df39bbe3227a17ee85be49e84dec5bb705f0710ec91e200130cbf74ed07. 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/QZNJZ2210907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b61e5a9e42e3c00b0dddec5fe350d596f0ed77b5dea1ad390fe8309583aa37f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNJZ2210901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fdc38df42477af6cc5ae68a1f6a9b55b47f0bd2917a98c3a05ee992002de67. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJZ2210902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416da336940906be5032291b62feb4a7e8087dbbec650aacfdb1a4d6c9f6be26. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJZ2210903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb563c714eae51aabdad1b537a1bcdd329b058a656c4f3334682b7239b7397a27. 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/QZNJZ2210904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf667fbe304087eccbfc731aaa0ac475a4bfdc21bb5cb72abe3d282dd34b73a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNJZ2210908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc882f7e1b7b325f4bd710f86ba9e9f0dd883d1fe3f6e0c9fefed402e488d7b75. 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/QZNJY2437175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c5560a075bb8a73ddd4d6b658b5d6c57535dde9ff972f7d10b8ac142006534. 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/BXNT62208090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47d15948743dd7d82c80d1b1a28e2a1f65207ad318bb853c1b2229b8090394c. 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/QZW9K2360394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bb0dc8839be2882d56a7eb95d6f3bf8835fca923e062156d9c83bf40e52f81. 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/QZ5AB2363170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24473a3120263001ce2de3cd20a1c59bcc85a2928b857e328b1d89c62c8d0416. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZW9L2297478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301cdf24f3a527d145d4cf8d25207d7ca4cc7f9256ff6350a609ace38fb394ef. 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/QZNJV2102556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5dbe43e4d942f52a60f44af7e593b15dd6f7b47176b9ff4c28a5052253d248. 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/US7VG2579283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beab50b406a9f7c53987fbf5a0c07d595fe6d966d9d49d023a714e12e63f9b4. 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/US7VG2579284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97f43e1a11d5787bce271c0e0d41e9ae8724ce47ecab4e212f418882e70aff0. 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/US7VG2579287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35a3693df70ddc5a70c052338fbcc8f473e39920cd99048cc8b9c16dc1ae821. 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/US7VG2579288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9abd05229739c3e7df4b57b40ac77a55661e9b6e4c716b85282ba79ba07113. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US7VG2579291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e648576703be3b5c91a8ae83e29635444f7d75dcbb643429eebf4cb0f763368. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:33:44Z), 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/US7VG2579286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe35c7e66d8b43cabeadc76cdbcb79825c894f4409ec930e414967076a87fa5d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:55:42Z), 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/US7VG2579290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf3a5c6cbd44831c021b37b348d3c879d19e332caffa14d3b5e78f9cfa22bc8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:06:50Z), 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/US7VG2579292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41bb5c136cb8422d7cd3a95fbc540ec663609dc6eaaaadf3262b97bb8962d2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG2579285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe34949d0d13378621fd3176f694be8757fe47ded0ad1c2e094059f7e2d1cee1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG2579289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061bd375f2c5894ca80bfcef04f5f27fd76203c4c0c5e64c44648bfe8f105715. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCQXX2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920c695328a2154f134b673a42f61f176950165b95ce455509da6a801965aea8. 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/QZTVM2488778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1828210689cc67418ba5dfb9c0a7b0407e2b1155d02cd90c6c6d2f0223dd38. 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/QZTPX2428888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddda13a2d5af0f7cb7101861d1be61c5049f998b271795f55b18fcb735252f00. 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/QZTVM2401236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80a6a0ed7fad86d48b636b9b8935a5cee201360ce845c1159ad42d5dac9af7. 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/QZNJZ2529628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d36e7ccc1c1e5a50f68a23761ca9098a2e7657af970850319e3c90cecca53e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BX1KG2200011.