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 0x1c8b7afadf7cd5111702ab7bbe42907447d4885e3110e67b2f4835174755f888. 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/205437ee-078e-4e6b-9d33-f680df6c583d.json and https://artists.proofprofile.net/proofs/artist/205437ee-078e-4e6b-9d33-f680df6c583d.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 0xf4f6c443a77d89a39537461f2cb3a54a5a50cd89e905439d131c9b6abd899f26. 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/NLY480900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0bce53f7e7ddc608e14746af76cc3e47724824f08602fdb413aed001bf65a2. 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/NLY480900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2969f55bda25058c8835703840272f671a71e81efed4c3ab35815eb21a056b6. 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/NLY480900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0704ddf3cdff872ce3ccc46feb9bb1a16b93a78781d566ed04f836b2319606f2. 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/NLY480900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660f1bb50bb2b24b792f8d3cf1e679dd6652c2485071c8cadffcdfeec9ac72c. 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/NLY480900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce48f30dc8a58adcf5b95d4d93fec0fd8eca177ace774691761896fafb52384. 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/NLY480900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13533b3ff6f5c1a95685e819da489e4637ff2c8e038c357538ffd3143521aa83. 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/NLY480900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ff760ea4b74cd0013c23231e87d22980291ea987c91c12d44ae57997747c2f. 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/NLY480900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec6db3bbc11195ca698e659ae4b671bb18fc5454c1ccd8eb9783334290e0aa. 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/NLY480900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28dd35e9e79c264bba83514118a12448b898a5497d6daad3f34bfb57c83bff0. 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/NLY480900011.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f18d1cecd8197132c07d63c7e552a20d82ede348fecfa5a930ea07b95c4f052. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLY480900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78ac18f3bbfefafc6a848dc31a2a5b8cf0e9068f18ba914ee387b48e9fc711. 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/NLY480900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3543c50b6eaccac7c4d8aaeb522773b771093307cf9eb49ab2618fcc116162a9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:30:40Z), 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/NLY480900006.
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 0xf5a6a7475f972523fa388e9c12ac91b2ef7ba266879856d9744d65008e9a8fc9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/NLY480900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a21870eedfc31ca438b3f65f8d8272a76ffcda55d4a07dc1c8591dc1f2c2ea. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLY480600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9fefdb0af1f5e843bb99dc145abdee8aba427c0814f41a78484af7f9e5027b. 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/NLY480600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd486ea8e3bdc5aa17df0ddb5087f5cce6d3269e293de2778e2fcb90e32671acf. 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/NLY480600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808dfd8a2928d387373d84fdf9984d19d96fc98fe58bb645398c23ce54804462. 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/NLY480600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18521893ca306dc09d3a27b4d50a8c1d1c2ea0c327c1870a7dc3ac1fcd792e6. 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/NLY480600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673646d11a2c2abca33f9d9262a3a6ae2dac3fd55fc13bb778c68b1f4e896f7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLY480600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a93d63a855ac14506ec11b8d0da38d33065c955ca50584dba43aca270584c0. 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/NLY480600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d4a767be1e9eb94083fab16523149dbb47c085bb47ef1ad0e86d98607c517d. 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/NLY480600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600733ff82c31b291fc3f46d91a202c4d53f3cfe1e8aac76215ab633e419a4f7. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLY480600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7bc4815f83f7cd110e16bc6184255e5fd07d91e398e8c246fcdf15fa3d731. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLY480600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db491081caa56c50c7ee2861bc3cab6e92bf459da6f41a74c047d48fd16b18. 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/NLY480600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f71e11bc713039ae6b46432eeb855d0046c25b2fc4af1ffa447a95425d10a22. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLY480600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06254906bc7bfb561d8e4bd3ea3ae8dcd872dd98c0ace819d926e3b5a7dc8c63. 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/NLY480600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd622b7a74d361a64b4071c11e7feda903b6ba7f9864070b29d940dfaa3074d. 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/NLY480600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c3ecba707326e98bc74e14e10094d9d91ca75168e4ddab0e6f065d4931d324. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLY480600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955681f6e10e7b10676a53ccb33a11c15e71347f00412a46d05c458a9f171430. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLY480600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08f7480ec1562f87de1c20fcfdffb84311d8c1981e0d2750bc9f184b1ff14d8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLY480600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f24a11aebb643784af8ea729f964d33c8ec492080f46ae0ae08568ac1e9d1d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLY480600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0714146fdb81c89489cdefada2b2f3fb538e540c062dd449c5d67d2df29bd78f. 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/NLG662200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b1a2df71e983c36bc4c700ccb7c170f2f33cc00cd3cb7fc9a1bc2adaebe8c. 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/NLG661700991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f78947c44a65930934dccebb32f5354172dba9bcac811c20e88850913bd5484. 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/NLG661700993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7183ae28a2a3168dbb5e389a8ab031ed16028264909773d11c70cd94f2384077. 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/NLG661700992.