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 0x27acadd4da161524cd11a3f12b4634240ce18a3d41c2f391dd68300ab6c08ec8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6968c9d-8d62-4196-8f22-6a3f10d055ee.json and https://artists.proofprofile.net/proofs/artist/b6968c9d-8d62-4196-8f22-6a3f10d055ee.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 0xc8393958e64748aaf4d135c9fa39bde77336691c7e3f6ff573e2e9515056741d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM42K1824157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3710edfcb308455a6166a938141182d7fe9257609b7990eea16f3655e60cfc60. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM42K1868122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee29e0a5d05b29a573a8aaba900788122bbb9269ebd9765e8518c480b0433b00. 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/QM42K1806841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21eeb7d726468a8f0b0044dc43208dc248fbd5b7b4552d034e5df22c6f0227. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZMHM2063572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc8271f453f4906c17b0003d3b66b593dd7b084d0185d946454dffbc3eae5bb. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZS632159818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbae9492094a1139d5e367373bd25101f0f6207f2786871e891504ae6c6b5cf. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:29:54Z), 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/QM42K2200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f114550ad77acb0eb330619940e9e00edf92cb89d7f4659ec5dc1ecc0bbde79. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS642234438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9189d9899b51c585899a05eb231da9461e6b48eee15be9ab3a9bca2f1ff7f6. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZMHN2314423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe8bf0d2d5b00b2001c7e3c5c6a4e531d93d9001599334260f2556574e2a1a. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZS632355522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f1ea549312734c68888bb71c0dc369104cea1449436e4094ce6ac08b181dd9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMHK2353290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374db98c48d94b47c061595e02df5237d528cf9712abd8741205aae285e09326. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHN2230204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f080e49685792b84fd511dacb5c4b069097937e5728d7e142557f5958ed70. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZS642287697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12799cf41c346392ed07ab487cf026f9db3e8d72d438b3043f6ab33d4af43a19. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZMHK2271059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf75b8add42005ec8944d90e053d48a2cff60d8f611dc289f9ffdd86dd01d6f. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QM42K2400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4a42c12c73e83a16799f37b8f6371a5f3c76d4973cbee496475cc570fdd6b7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:44Z), 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/QZMHK2538849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89e11f6872a5a70ab1bccafa00b57dd040d1d27598c6cba7e924ba548a05c11. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHP2586044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242542edb31dfb6300095f53bb9a2dea05218f2f6c530df8467c0ca7a1aa34c8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS642530994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992709aed147606f6e3f1a42d26eecb5f5cea4439edcb10360e688cb887e5118. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZS632529291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090def7acb4ab6839c35380f3a068c04c566f93cbe355486512381e87633184a. 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/QM42K2551780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc4cac2d0218cd51a71d887896d8c7205751794070c3ede54150edf52f4077d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZS642526383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b6e72493b68d9d7b03efc11ba1d53938b3e55397c175c49e28b4a8eee1ff1f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMHP2509710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39f1309379a98aecc568eb2f557b3ce10afafd7af15f27c7e322d66ebb6e14f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:59Z), 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/QZS632570710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdf0d4fd0dfe8f569077e34af75668053f5d8375c78c300a80658df8eabedf5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZMHL2531795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41224b87d874fc91eef6fbdd41ebe365683be5f0b0e21627c4cf1bdf4dc2e6f. 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/PLX632000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab7896e2d7d1be0e9f1957cdd6df6ffd2761bfa5017affa5f23438415a385a0. 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/PLX631900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5716866cc9d40fb3fa87ebbea3ae9312cf3574cebdffa61b8b04a21afe943ca. 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/PLX632200032.