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 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 0x75bc930666690f9ace298e35d670e65e522c6b2f27a667383006a7fed5583b18. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c99172d-bf85-4dd5-aa5a-5e44255be219.json and https://artists.proofprofile.net/proofs/artist/8c99172d-bf85-4dd5-aa5a-5e44255be219.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 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 0xd9eaa4d5e038cb0be92c1d4c137deba3e11282a707055d8557b61b8959177a74. 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/QZTAU2372423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7cf5f388a0076538fe08c029582e2c2aebe9572adef2fad2dc22387b52bedb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZNWQ2326952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4025cf6bc9c06ed62d8d417831593dc031c9da6df602d30f76ddf62bdc7c92. 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/QZMEN2233638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8918110b2dacbc2f8aa186efc76c38507cb5a7145f4cf836b44c76d63f68a81. 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/QZMEN2233639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc375c16e414bc440b9f0acb5859119d8384c5be4215c52ce63e4caeb639c9170. 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/QZMEN2233640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a71c91a9d077e6202930d253cb48b4801073cf6c7a4c50c62f7c8dc712af8a4. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZMEN2233641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2790401a72b126f7c1f9a1a5a46f926e5bdd006e5f1e61ecbf3ba165be0c0f42. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/QZMEN2233642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa5396b8a13402f8552e28cb493271f72eca175edd6f7c02932eca9aa2b914b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2233643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39cda36dd50b40f07a0af9a8af3b939f9dc95a4d133c5ed85eeaff1473fb55e. 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/QZMEN2233644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80a647b40fdf6d14537bb97c153e32d45a77662ee9bb6ab16d60840e983fb0b. 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/QZK6F2444328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc784db078a919512b6af3eaffaf5c979a8bdb85788188a9bfba718d0275d294c. 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/QZWFK2397270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd496d787814c6060cc6c8f54d71e8368c065ba1407cd9be3ff0a0f8cfeed8a1e. 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/QZNWQ2326953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88240e821081ee788380c10201af8ea55eaca6e188ea85304a37a177c07427da. 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/QZNWQ2326951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da075eac61184a21354419ca4f0a03ab51139fb3efc809c723f4668cc8874c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZNWQ2326949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3807221378f38dc8048d62f3cb27db15e530153ea3b1a19a5b3ed03846d3fc. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZTB62222269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5b019419cc44586ae9b0839e72d3a1f5b0c447fca5aed106c180141d2f32a4. 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/QZRP42264603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a4f8af69f942a09ca3182607293a24bbc30ac72aadb082a5ebfd4b0892b428. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZK6F2208910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7608d43daf54c5bd4d94168409e7936a690225ffa03b02679306177e76204484. 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/QZK6J2289475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d3b620f0755f7bb983bbab7cee856f41611042817db91854c446a6b262a5ee. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZES52269166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dc564834ac8c0dab9909bada874005d53e702094350195975394b13ab76734. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SE6TI2156621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca65777eebb08200aa72744c3fca6f454102f7bd51cc1a1bc0c1b16a0a94227. 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/SE6TI2156623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7fd8296917016af5758d89519aff32b5f6dd86f98dea627695a802da0a3175. 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/SE6TI2156624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b46ce5758e7b22d03af6566ad96dbf3db8d53a4ff1231e17ad4424fbfd07150. 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/SE6TI2156620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b7e2e525e3e631a9c1a205cfb0cbf62dd82b75f7f73c80836a009d6da8606. 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/SE6HN2163863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88662fdf46d40999fb7ded9cb1b61146f74a9e64bd1d53ba3a6194ca32b36f51. 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/SE6TI2009784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351c01f14c91f0a6366359f54454ff9374380273b9c2085278f2f0a663f4361. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6TI2009786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44428734872514a8cad274a3ceeff1bcbcd12f5186d1f32782aea34611ac0e5. 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/SE6TI2009783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfccdf6c7f65e74d427a92ae413101d43f28ede95287f9c4a752f13462883af74. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM82045308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe309db6949b61390fb02342e0485d82bd64853d1d7efe255fd6ceac85293ff12. 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/USHM22080021.