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 0x506964b07c716a20f474dea1d7e235fbd2545339aa117e5357bfd98eb215c5d6. 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/351892d1-a114-44ac-852c-4fe8b1503aaa.json and https://artists.proofprofile.net/proofs/artist/351892d1-a114-44ac-852c-4fe8b1503aaa.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 0x1e1ee0f24cb32aac214dff45a6fe4ce836b6afd537c6588303e9cadf09e44a59. 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/QZNWX2095435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7afd88c823f43bbf0810a8aac88466a261ed21dadcc8a6723284683f03bf3d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN52389861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1647335b82078cf4b2ec69de2abb585aab656917ae8bd6694eee3cf972ac3a. 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/QZHN52389862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb5cfc9064973f41e51826ef229f732069f3504ab2bf746db1e64c02f635a20. 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/QZHN52389864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d59a44aa92f162f51b910b1e23b3d6c172a27ff8e17d8de611a10f3da2415a. 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/QZHN52360849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885d007dbf8c98e26038ebaf441b37bfb37806e4add6121cac4860703d1dc5f1. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZHN52389866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc96d16d1eaf52f0d15fe3937b58a55d92abcfb6256423eea652df67597c213. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN52389867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d10daf1a80da5b0741db7002c77ceca3231396df778d6403ac395ffb2180d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMER2319340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833f260511c4b3c9c39d4a0424762a91f04d9d9033a660016e7282d70fabc969. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZTB42302320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d26d36cf73a0ce1a3e97e344f53b0c2b21083fe26c5faca77698baed9c4d624. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZFZ72400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb5e1f624cc821b376749805e1a75c73f22339025a635e5b18e24c8a4d28379. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZTB22416626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25483785b3a7da9e4540bae2b7e4af3c04cc62a255472f5bacc9f42acad5a928. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB62458848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bac91b90d65f49efdc2f6b618f1c367930e41dcaa61105b854b73cdfd17227. 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/QZHNA2388301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b10384e5eb93f6580a31f6e28747a4393645a1416c5f6c33e20f8d9232cab. 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/QZTAZ2283841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d816f8f49ad0c8f42fd7f4b949d06734ed803b6d56d77ad3aeea112fa56c19. 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/QZMHP2093211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866dba24f77fcaa3b8c55c09b32a55872f96fdf5384a37be567c1320e0d4e3f6. 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/QZVEM1815471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd45c3e73bd5f4abeea088d3210da145987b2f2749968d311f24566040a8209. 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/QT2VB2426396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8086d9061c6226e0b94b8b40247c401cce19d49b53e9af9ffee03c7ca64647. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QT2VB2426397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6e876025b29230b32b4093325da087de426cdbc0842e3f7bca003c3617a4ff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QT2VB2414981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97519f2e26acc9a2cd61629ac20ecb792ad54a965ded6b0db929da265ab68e. 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/QT2VB2426398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2974ddd18364199bcfb2bac6d3c379474a41a6c6edfd198f4201a87aa9a76ec. 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/QT2VB2426399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1464a8515b5bba974505a6130023cf8530d4b5584e18dc59d0df59e7bc5e35e2. 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/QT2VB2426400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c6f48fc21876e18491057b12c4d2f0f870ad45423d023bd9faed8d422359c. 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/QT2VB2426401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddd6c3750e4c2a0bf140d03f86cd1bfa5a8b46702e5cea23d90e7b316e3363d. 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/QT2VB2426404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd0f7486b3019c9ba2e01c636f18eb0ad2fd5a95abe9bb257459f9282887966. 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/QT2VB2426405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae32a492b3867b450ba0920c1f5e4adadc3684aed5f5224d841baccb7dd3a3f. 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/QT2VB2426407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c932a35202dc46a48f5f2b969d4e3c6f29518629e6f6418d0b91cc6e5a4fe1. 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/QT2VB2426408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902684a7036f012f3ec81b6f4dc10b55596f1d2aa3383b207ebdf5d1d33997c. 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/QT2VB2426409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bda3b0fcc19b1328e9f771d77442d21f15cf0b5aa13f77d64072344e3c8218. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZPLS2394121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9e4720465817096438c7fe6120480e9bc429312fdc2c2322898bbfd6ff7a3. 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/QZK6P2198873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6e876025b29230b32b4093325da087de426cdbc0842e3f7bca003c3617a4ff. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QT2VB2414981.