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 0xd4c66d51d5343e802fa069713f88aaf2aa020fa1cca99d37176ca9fc62c4a57b. 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/a3370895-bda5-4b32-8f32-0c03e587fe3b.json and https://artists.proofprofile.net/proofs/artist/a3370895-bda5-4b32-8f32-0c03e587fe3b.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 0xe8dc64424be6214209de7587cf4f37e5ec17b6dd3be3373aa11146c7f4a91f4d. 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/TCACS1607813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4a0a2eb54a57ff9661abb29481fadcda7a24e0475d1eb607d5a51b3df8239. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZES52123316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee9792afe93c016fa4f09e9e8288c4eef7e86344f39a9b5edb4536ba2ee8814. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEP2187772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d0bc23d6dfc9e3a6dd8c2c3c63bdcf2759168a017069036d1719539337467e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2161633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6337dcda3cb8bba945f575f4f95d9fa79cae0f7cf56c96f47b2a1973cb60fe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA2P2227031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa072faac487825b3a600c5ed9bee9b5439720e4cebbe311e377733105850df77. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USA2P2241856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43803ec6efd9d36565e82aa550f458b30084882cb12111e35d18fce268ff15ad. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USA2P2327465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb689173708f23b47dbb81ce5f9c13abf403f131cc7e47d6cff19da15ab4b3820. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA2P2328317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c91323458635a259e9292d3e399d510cd7acf3ecce6eb98e7ac6d056530789. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P2328315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b89be654702500348127d9c1a82093d4a683411125d0ae8c01ffdd72e3d921. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X1853268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9683967a88002be119e215eac9b73bc7ec2cb16a0ca94a65155e27236d1a64e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2338642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f22271f0718859d0a98ab0f5ce7464712f6a7ab847ba67e32034a8d3c33bc2f. 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/USA2P2467885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f22271f0718859d0a98ab0f5ce7464712f6a7ab847ba67e32034a8d3c33bc2f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2467885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b3abeb44eeebdd53401f783aed295ab5b455d5e35bbaeb6be2c77b47929011. 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/USA2P2474228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1cbf323815a298ca47845b9c57282b3a9eab812201fe010b6f1be4fc1002af. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USA2P2474230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b3abeb44eeebdd53401f783aed295ab5b455d5e35bbaeb6be2c77b47929011. 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/USA2P2474228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d4dad73f744bd1cf46ce30b4d3537bc82f9d286e49cacbae62e183962ece5. 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/USA2P2474211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933beeaee9a7c0bb9d7387a125b92dca2b348197d9f0e6251f305e0b7c2b33ed. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA2P2474208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1a16c78b12a87148ea3af0eecd9794f58f091f570d82eed49dc1cc30ad2b66. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2P2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f972d608d182cb640d45ddd98f47fd5499fd30e7c3971039acee0062ccad7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USA2P2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59a345924366bad73dcf1000d853e56b360901c7afc7a166af7529f455ada5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1a16c78b12a87148ea3af0eecd9794f58f091f570d82eed49dc1cc30ad2b66. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4875288962d309ecf33f5f365491ff851ca17bcf70f50144d32be02a4637be. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USA2P2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f972d608d182cb640d45ddd98f47fd5499fd30e7c3971039acee0062ccad7. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4875288962d309ecf33f5f365491ff851ca17bcf70f50144d32be02a4637be. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA2P2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d0341e938273ba9163fad2e304e799aaf3c40cb3f7705ecd3704beddf634fa. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USA2P2500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204529fa8bd6e93fae65fea464ce627fabc1e239175174b6b420220840acd046. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USA2P2507248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e0ea35681a0acc17d4797408c17613ff6d4f7b720fd3ee0042b0ac82c37cb0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e59a345924366bad73dcf1000d853e56b360901c7afc7a166af7529f455ada5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1a16c78b12a87148ea3af0eecd9794f58f091f570d82eed49dc1cc30ad2b66. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USA2P2500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8989a95fe3261fc0cc0df2f5a68d97cc8dc811fcba34eafd565f9b0a9c865225. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2P2529537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320c6f83f65f155f62074358161acaa888b74a909b83cea43646e66f1e3592ad. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2516464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f5f730d167638510f32f838c23e87d654291e7eda6a425d480156ae002276. 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/USA2P2416145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643eb0506f591565e5cd1b370b23aec7d660cd910e140dfd83de55b949c16929. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USA2P2535905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ec27a5f10c113c14f0a3e2d494502d9fa3c81e95f301fb38e82c872783102. 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/QMBZ92273075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054c04a3f801f88f25bb7234c7ac7fce725439cdfd6d8c7ed987edbc90d30cd1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AUWA02201741.