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 0x44f50a811b45f2926b40764ba77146442fb9fa5b41f4bf715cd082a3f36ea841. 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/2166ab4a-ed20-46f1-86dd-485ee4d9a1eb.json and https://artists.proofprofile.net/proofs/artist/2166ab4a-ed20-46f1-86dd-485ee4d9a1eb.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 0x32bd4a3a6a5c8f9d49fc58a6168c16bc10aa00b9582ccb7589d7cd3a2f2c2879. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/RUA1H2428556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404bd2d3fb5080affd01abd4f7981189410f11294dc88bf560f3b04c4d1fe97. 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/RUA1H2428557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ab6a4cf8b18a2408f52503caf8cd2cd0db16b09f151a169890428610c55707. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/RUA1H2428558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdf71b50020539f9438ca4bcd2394d7405d2581137d91f36be743fa057fe633. 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/RUA1H2428559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adcf666d6e652f929d89513901119b87e9993da09bfaa2dbd6e697bb602ed7f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1H2428560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1ed6232705844d4b938cf5e27620cb316c94778e51722a455271e37a4cca5. 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/RUA1H2428561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18156646c901e7999e2a4c53541f5d11a5c208f03ed88a492c2ab03c52275674. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/RUA1H2428562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1de4a61f8a9bd270c1da32329b14f8904347f8c6a1f352071568f50773ceed4. 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/RUA1H2428563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1639a5e1d6fe7441e9558b8860a36699f427e24efd235e365da9d06aded728. 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/QZTPX2185673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc93dab02986c8379b5bb42d06053ec78c67b2189af877973ae77fd1dcb8b904. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZTPX2185676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b787b94260693e87bccecd767e217f936b3c75de32f6758c17b897161be2bc. 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/QZGLS2148269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54a9da2a872925d7e78073c4ef2e264009d8bb570330c30d25c56721b96d230. 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/QZGLS2148274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b25889723dc0cdc810ea803c96256004ec7102363726c3739fd29d31f5fbf2. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZGLS2148270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6247072a032d7a5ccfcc7105923bbeb4fcfa6c5a80b36b9396087398bd479c9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZGLS2148272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db4ddabe67696b4c6c8a9c9f6fb30a4c22d952cc57e1d3c72e2f62f5cfdafac. 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/QZFP52441730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e893e1a3ca3c9a01e4b44a7d86738019678092f5fa4a7facec2377387830d. 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/QZNJV2413393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30788c0f8bbed916ceffcb297643b8e7d8a3ade6aab222aa84cc46fec33a2c00. 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/SE6XX2327663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cecb682b66a1247aa9787111ddd7bf8cbde9e6006885ef9d2bc85bbbaaf86b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZNJZ2394152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de8d2ca35806fab686028b24fa27c823c33089d2669b7d4682f5933fe303d67. 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/QZNJX2397545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf4a9c45fdbab422ca4faab364afc7ae20e81fc26da676cdeb127728d09ec10. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMZ92369084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57529553b83ce898e8da7f37cdad97b2e72ae1e7019b4aae0156f0c14bf11ce6. 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/QZGLM2373881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde021c70f7325a4000c307c912264e8cca7eca5540dc81b93b383078e59ae6a1. 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/QZ5AB2397380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa79c8403e3d7e6aa0a1db34bd0ebdf160525e53179ec080fe9ccc07b766beb7. 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/US7VG2339605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37ae3a9dae1aa40dc241fcc09ab2f07c96c90387f37bd734565413558e93f7a. 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/SE5BU2313957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa63c7b5cfa90e28c3751e5d06bd0dd90fa0a12ab04d91fc6ef82fa1a89e1af. 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/QZW9M2278106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be513fbc9f41b8e6ab9d668a39a4f802c59d04d549c304f334cd737415cd04. 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/QZW9M2278109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02142fec12ab29fe1f9e9696788c1d05dca9c6872bf7ef984f53fa9ae206ab92. 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/QZW9M2278107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8498c2ffd616b6c0ec08a4cbcb54585d989c9d128b1831132a1d4a12f98c9c9e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZW9M2278110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f722446bdacebe753f55e4d6ae724d21bc5d8b7dd60cc7f636d6647b1a2dc4. 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/QZW9L2247180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f264faa1caf7eddd5a23a9197b61c6d6f0545a997c5b7cdd6f6efc26f73abd. 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/QZW9K2242532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24eb24be49ce42570d1e95f224b05c8affc7df31fbd68585aa423a753795ab. 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/QZNJZ2212825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b6a14fc7856a6f971b55f4ef396255a6b1cc67bf7d66b0b29d8219437e32a. 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/QZNJW2264215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acfaeedb3d930348cbf42840b760dcf90642db0f2111531a7b87f46b3cc78f4. 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/QZMHN2251900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f20161050b08bb8106eeefd798c3d9c26a4c01158188f36863bb0cea328f31f. 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/QZHZ62288452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d108cf6ad0a7f79bab060339bab20f6bf74e7744a32cd1cc3d2d4a4078dc1f. 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/QZS662293320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003c6f010a9521d3be34afc2342c97788e4ccb37bbd8456099cfed89d48d46dd. 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/QZHZ42249902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1374186e9ccccdcedf5789b9b096614e51a8d98276a5582cf412c45546136ed6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZHZ42249905.