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 0xca62613cfd97d8ef90ee35f60985c2cfab1c12e0bc649106dcb7e52ffe3816b0. 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/ec119265-96f7-41ed-8110-9e393e3f5927.json and https://artists.proofprofile.net/proofs/artist/ec119265-96f7-41ed-8110-9e393e3f5927.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 0xf3f66cbcb1c8c06a2b4b027fef5ccff4250f51c8b1491bd6901d08878adc97e1. 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/QZAKB2421264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d350a09a47c2433c97b16f12c3eb34447c12b8661ad42997df4a9b062634095. 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/QZAKB2421038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22de9e6a706e0cfd96dc1e1680c19d5591458395902e3f1d7702ee79786c24. 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/QZAKB2418528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45164f15834ddec6cd4674753adaa542605a3b6c1b9cf9dc9518eb4bbc7e4635. 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/QZAKB2415552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c840f0ed70984943142499ad88ba22215d1369d40f7a8232d75fb9730928a1f. 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/QZAKB2409266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2b12081fd59755af4acfe77c8fa0b607d26251888bbab92dac00b16f9c5d63. 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/QZAKB2405975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16338abbb0d4915305427f3e9a0bc550aad5d7920e673fb9713d848f3c7ee58b. 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/QZAKB2383398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84893db150e4845ef475fbdd322b4e3dc90efc67a996d762be1e560a70cbfadd. 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/QZAKB2379994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e57a9d85bdd17c20d8a19cfefedad689d585104f0a4d0616a724c2a03c2eff. 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/QZAKB2369977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ccbe02b78891e18786b64b291ca97a32164e36c33badcdfb3adea25b3ff37c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZAKB2369257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad8a80b904e256db7d1dc26d83140877a7500138f1f9c60c65211e113d67a75. 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/QZAKB2352998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9594f61a0305f9c606de517a30cebc5734ec3a72b1f7316617eb656578539fd0. 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/QZAKB2339682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81176611f2ddb4499ae52b8ebf9bc9863ea05f7eb2494b7e5905f0345a667825. 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/QZAKB2329413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa774255924fc18c099f1fde7b5daec684dc59d75122a50e9b6ab5de1f3d89269. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAKB2325667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aae22c8f6a622e892735ce5b1eb8121c373e49481d8f34e2653649b0e8fcda3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAKB2313913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871c941ec7cdcab9e8289ca3abb249584cb2964fb7f92fd457f30a3cd01ea1c3. 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/QZAKB2313914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54fa4fdee12f7a6867d635e4cc25b53bf7cb6d9914f3be24d473da967a56f60. 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/QZAKB2303933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c58b414e5301d2ddbe982f747af7d305e5ab09a7b3c488ab3e480bcd465baf0. 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/QZAKB2303934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f45b6a9aa6e39dc0f8ed9e59efbf4b53e8f507c25d15106e9f04733323bf32. 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/QZAKB2202349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04000ef6840302c45828abae0c54cf1781ed097eea600fb85f1b8f286cd8989. 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/QZAKB2174980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7841755eabbb23fe4e6ca35a94d4211c313ca9bcedda9db6e69ee970f62de80d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZAKB2172666.