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 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 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 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 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/NLY480900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0704ddf3cdff872ce3ccc46feb9bb1a16b93a78781d566ed04f836b2319606f2. 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/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 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.
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 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/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 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 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 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/NLY480600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808dfd8a2928d387373d84fdf9984d19d96fc98fe58bb645398c23ce54804462. 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/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 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/NLY480600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d4a767be1e9eb94083fab16523149dbb47c085bb47ef1ad0e86d98607c517d. 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/NLY480600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7bc4815f83f7cd110e16bc6184255e5fd07d91e398e8c246fcdf15fa3d731. 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/NLY480600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44db491081caa56c50c7ee2861bc3cab6e92bf459da6f41a74c047d48fd16b18. 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/NLY480600012.
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 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 0x6f78947c44a65930934dccebb32f5354172dba9bcac811c20e88850913bd5484. 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/NLG661700993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7183ae28a2a3168dbb5e389a8ab031ed16028264909773d11c70cd94f2384077. 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/NLG661700992.