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 0x4ff3062a385ab6b5869f8bcd7fcaf4dd18352539e50ef998de23f25f81bc3dae. 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/86942ae3-efe6-4d36-93ba-bd9255934788.json and https://artists.proofprofile.net/proofs/artist/86942ae3-efe6-4d36-93ba-bd9255934788.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 0x2160cf538493ec6a7bf36bc4799a1582dd9968645d7a5f367e629044aabf0ed9. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BCL2K2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eab7c156f7ad9ce9d8a50a22c1a94bb951adcc52a2a8a09ca6b9c8f3dfc828. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BKOUP2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a930c24a8448e8071aabbdda5a727c153a602a8cd5e29ebcaab141897c0dbd1. 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/BKP9L2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c1df9ceaf9e5a3e64301aebd7b7f8becb1af8054dcc2cc1873573c7824d676. 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/QZTV32546142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562bb63034537f44de7a7f7df4a129e05e02829fc8ce3f9a864d1754302113d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BKP9L2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5591d499921afa1174e2bef927536bf7020a38b6385f870f25b0578116c33413. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZTRX2586261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d49081d70b6086e947672816b320d4c329db74ccf49b849df42136cad2ffb8. 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/QZTRX2549135.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a1068deb916ef1ea8f8014e5c47834526f5ebdc03bd71a8ffb862ff2ef8b8e. 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/SGW502574410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d2cd12dad1e014262a5dbf0e315c7db9bd1792e0a3cadfd4cd39318a5e7a39. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BRKO12500260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5a578702788eae5c0c6cc897b17f439ce26f46509e3398ff1b0e3ef1f23d5e. 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/BKP9L2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e232460c2d90fd5c6100ccece76870c8c1081f6e35a09279a731209f2e095d. 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/BXYR22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fb21910cfeeb2cabcdf22a959ab233483f71e969c25b5c2886df47cd5eca32. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBRKQ2569656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b26c43fc1e1369eef57a7f1b41577893ae61a916ebe7a0c656b7d9412b2a09. 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/QZGLM2595252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f8638b9c8ea19e27c35b3ea1e763e627fe37f4fe5f378e4c94925f2adc34f2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ2537486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda887b6b9550343da88e97126e704fd7847bcb6351065586a5452dd2afaed25a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GXBAV2561315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94154b8dfc5b787010675e25e97cfd277dbced13a23f794bdda896e68508613. 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/US7VG2568936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca7b20842911f0b42e39f0a1182207abb03cdbcf75618729a93fc1fea3f55db. 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/QZW9M2431161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1fc89d1dab25a6e668dbf349809280b1abd3eafad773c478b1bca10b835fc0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKJH72400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82f0c7de6aeb160232571da2245f709ea224f543901468a968a0f74f53da2e9. 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/BKP9L2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6bfc1455104a28f0737188107a9ebaf3089ffbb12f055e33d71d2efaa524d. 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/QZHZ32233709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95407275703e4599a49ac246fc0a8699d6100be2228a4cc27d2e597449093635. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTPX2383439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aef75e758bcf55b2b2acc03a3cb4801105cf07902dcd0fb00f99c9f460dfefa. 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/QZTV32331066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f1b0b2adfb8f9bfc71cb4ccde885576e40f033b55ab7f61c89aa719d2b5e0b. 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/QZTV32331087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb7da22f9f7e4804e5dfbe9e17b31e3051e75dd73afffce128e87e8837d2bde. 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/QZTV32331179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed9668ad6b30bb6739bd7b7912452d748caf684f39c0d6669f65ce72211a262. 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/QZ5FN2416553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb6b12f8a4ab7ec114d00450c9124405dde97d0ab2517b8222ec802c64fc093. 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/QZZ8A2376456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345e993afc973a93c25696d3cb9d66483d947be0b25295bca674ac944acc2981. 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/QZTV32320833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276db958ffa4f05a7c554d2390e6936c123a18e11bc64156b193b4e33e6a2688. 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/QZNJV2396110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc1bd5313bf58ab3925b40a45ea1e0048dd82a78800aec820295358663fff2d. 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/QZK6P2375199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2966eb3fe734374f93b52437d88233566131b0fd98f987b93ceafa8e92217f04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKCMX2400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8cd0aed90a2412a462ae9312f35e3f2ac29b5f161a25d58bba2cadad79331d. 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/BKCMX2400210.
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 0x8ddd0af6041061657938799b46eb2d4a1899f84ee18aead86746f87d204a6eb2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFG2331455.