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 0xc34f897e287a79d9bacda852868078c822d96cbe710039a5bffdb451135e4ca1. 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/f68a757d-27a8-48ed-8ead-e4c08ddada56.json and https://artists.proofprofile.net/proofs/artist/f68a757d-27a8-48ed-8ead-e4c08ddada56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x32a62f364a868c3b425c82693c74a8b1ea92b110e28f5e01db47ee92b04c16a4. 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/QZEKE1854686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce882ac3ac9800b8702097eb9f021beb604eab03aecd4010945479ba845ef3f. 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/KRA341600606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bbeddb772de5b841e2ecb078f6497c33adaf708e34c6a808440ec93a9b55a8. 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/KRA341600607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f339583b3ef75ed97c16fb8e5d00c9bdc41ee4978648f494be04bb07153d68b. 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/KRA341600608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a909226ea2688b3babf062bdc60f4010b5eddf78178301a060751628d8ff70. 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/KRA341600609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b99b57509d48c4ce6cd2a65746477030b6b4b101b0199e9b58ea4b247634b7. 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/KRA341600610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4dbb0d84dd54320d5b1054a26529ab82cb6c20171af44c501a8e43b10e3772. 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/KRA341600611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1417f5cfea47a47ec3a3480cb07a13ad947a224af784a3ef27de4ca904d94958. 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/KRA341600612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f21eb9791993d71a8bc0b5ba9521fd1b3b5c56e0da452d664b5410ecebbc785. 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/KRA341600613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d95232d7cad988431ba6f130b139dff455901d1885d00e599080ed040ce568. 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/KRA341600614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16396617285da4241bd97be04af05af5b68b82c906bae28c2161b737670f80d7. 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/KRA341559357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93508650c97fbad04dd23d49e7ddb20776a0c215fa2df4c8eff1f3d5839bdd54. 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/KRA341600615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e9969363cfd7740d3f2ca46c4f9c451ef6792e61331b9ae2dcc1392688ee0. 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/KRA341600616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a67e7b7e30a55971db85f8c13cb0e510d7884abb05bfc8001419d4ee0e2d86. 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/KRA341600617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113bb7c78b08c35477b6e513fb0b3fab1270219b73e524b6ee8501e9363c42a8. 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/KRA341600618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a7b3cc2c0925fb9c9a9e6ae721e8fee0c1e65222044afd2d3ff099d9d6882b. 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/KRA341600619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bc5a7c9eab736a85916c6e5a7bd30d08422f085c1f4ace60574944250ec8cc. 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/QZEKE1854596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4073d071ddee97de3a639331cf988faa410321c934e33d2548bf2bd4beeb7. 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/QZEKE1854597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91567427c976f8f7b8cc53a4eb7eddb41ff88cdb50de6670040029c0e3f4215. 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/QZEKE1854598.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b31bd326d70f4af8c151f2cb40f3c117ed623833e5961995520400d65a7f7. 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/QZEKE1854603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c00c3caa2136c787bd7cb5ad90a3b89397355745b12a9fe2b83bf84fe2c7d5. 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/QZEKE1854604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1359e112c3ba20e83d574aafb6d4e0ebf91efd6b42afb1d1594cee02c39d76a2. 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/QZEKE1854534.