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 0x7fb087bdae067993c0ab45ac9ec12eb1a94bc8f7e8289649dc05cbbc18265eba. 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/e6acd8df-404f-4a21-b500-540c8fc9636d.json and https://artists.proofprofile.net/proofs/artist/e6acd8df-404f-4a21-b500-540c8fc9636d.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 0x7a0548507ddcd83e6e079f444b79a70387d095915a37e7d40fe9abc0e7c1aea9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCIH82402536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e164da3a303fff1186a81893e8221577a4a299530b710af00e18dbae32710f9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCIH82404181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa70e068baf3825b0676fd1aa5bd280cac2986ed4890ca19876293268cae24c3. 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/BCIH82403276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df400bfd4e2d074a750194aa3b503c19fb27ba2a205a45eb5b3753994fc2ef. 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/BCIH82403832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df77c41526d7138a1d340589a2824adb8099bf31eaad5ab790c5c43f242f01b. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZW9K2367041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa2df699b4f048bcb7ce96fc3d2b74967fbd9a0627b0d5e3b309aef219f9f2a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZW9K2367045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30940615e1f596f839b63c781136f9976115eadacbc63b8a324acda30df9feb2. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZW9K2367046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403073caef4d24351a7fa9608bed285dc8167414a304af36b3fda12dbd2425f0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9K2367047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58fff959822541af6a02c79fd208d7a4093258e10692acf2a2d19c51dbdc931. 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/QZNJW2506571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2d0308397234f5ac9e494570f301978436962e207a7adf1eeebb8d126d55c6. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZNJW2506619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104c235450992f09d5cda5f429425daa6516cf26275aeaca7cd98dd1e4d06168. 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/QZNJW2506633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85294e1f1aeb44b9bb6a613e515d54651fb725dd6827ed9b06f8f6318ee7cb7e. 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/QZNJV2539894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fb69183eaa02bb7ac3322e49e3536044e371736a195c5f38d3561ace44a428. 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/QZNJV2539874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0c3a3fe59b762e68de23ea49074a5c192539774e405198743bca5be646a34b. 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/BCIH82403482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d82f18f2e5bf3a17b422871e33f975b615cfdfe47f379192e4d0a8ebf07f06e. 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/QZGLS2591275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3771ce7e1ab7796b18975d712bc196f92b3b3794ccd66272e4fffca63a38a2. 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/QZGLS2593689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c84e2c651b6785284ff23f0fe9b8b4334d67aa03849624d4f8b06413f8e0f. 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/QZGLS2593716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4fc1cc2f94eff930db94e14d8f5dc44e82fd4a345acb1b96b116433de345b2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZGLS2593717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826de0d4a308dfd9e2d36724c8d67088d97a8004b21744c807618122a5d15acf. 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/BCIH82404259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1500e5aef3fc9173eb9b20454884f0ad98819011f2799ca890bafe96cf584a89. 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/BCIH82404211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d69e15ff693eae3b641438fe12d7827d669f25562e6e1aa1d2237eb0977dd6. 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/BCIH82404258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb6830a4c9f430439103bfa4f5c8843c3bdc70e80106daba132fc2fd4674670. 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/BCIH82404210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea90cac0cf036b16c5be25fd04b0662bd9fd34e651e8814739a5341367ed10b8. 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/BCIH82404133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0db306122fdfa2d6ddea9551a677e5640716000ce10b7ce0b2814597bd17c6f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BCIH82404167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7337afea8f610a10c6991175fde52b2368efb471b85364d78cf1c90b8b124b36. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BCIH82404166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33162f13fa2d9f6d5e69ca8ea57d26166c1a505171c0a058e4c50fd27d280583. 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/BCIH82404090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a6c3c0dbcbe34b62d5b1e6e150abcf68d4b01884b05aa376eb978af1cec749. 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/US7VG2584673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d084b600690452f6f53a10f83f9496b2ed5ccb1dba9b1d98ae08c902f3592. 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/BCIH82404044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e0bc9a317475e937bff5c37677b38944a49e46307e61f96707901c6cd35502. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BCIH82403882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301970e4ed9759a377c00a5032b4d8d674d0d804e8a84ebdb57ad52c1ca7b949. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/BCIH82403725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf6088c450bd63938e8e7dc2c89f7b0cf3d1334b46b935d3cc9639bef68540. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNJZ2454351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd18984a009faace308b7ac97eab8a2bd89703a9530d1241d90007a4ac8d487. 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/QZNJZ2427464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e16af43ac4a93022846d1986d75c54ff8018b7f0b2148d60fea4904824a07. 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/QZNJX2461063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd926197c1f85738484a77fd45c57f7d0bb726938508599faf498987f4c9f5623. 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/QZNJW2412569.