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 0x8e14d2367b71b501906f6ebd3aee9edfeb71f234cc7b5182b8087a811da7b177. 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/92c7434a-a672-483b-b460-b3143d504dd9.json and https://artists.proofprofile.net/proofs/artist/92c7434a-a672-483b-b460-b3143d504dd9.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 0x47ef97aa19f153c038f58e03a89b99b5238187390c900f790b6df34eb07a8ca7. 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/USA2P1322607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13017bea0203bb2aa4355ef625d42b9bd49e9523968e61a3f12a5ebe3027afa. 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/USA2P1322608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9e93963fa90597feb7d1680d9493229e206089e64d2148180151ebef1d5c7c. 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/USA2P1322609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf821cd0948d61a78ccccc3e39224dd9bff8a846708bdf4b4e2c370b6b6f4d. 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/USA2P1322610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4587f32c63075447c52c3c00042bcb82aa58535d97aaf8364c2daf9df4a25c2e. 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/USA2P1322611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14062a88ceee76f99434e1477d2a8b9956c98dc02c8cccaa0876ed93feee9f. 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/USA2P1322612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aeb7fce4fb87eddffad2ebbbdf9eeb96912c8c1c8b669c649a53a13bf6aea0. 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/USA2P1322613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321019f230c61f994bf941db13926e8676a8c22e38e1d99cabc089790aa760f3. 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/USA2P1322614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9577757850c01c00e8c4a8d79b091dd9dcb2fbe6643bf8092586ce154419ebb8. 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/USA2P1322615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c7c607a8b10545af27da2e7c6f4b08f09948ed1569f88face0e1b2d1b92681. 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/USA2P1322616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029d8b00aace79cad919c10ef2ecff9afc56c56c43bb8d4160b96973903c016e. 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/USA2P1322617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149c4dc17b4377b327147eb7107fdfe06fd5ed26257ddb1752c88a74bdd36072. 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/USA2P1322618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb1647e8d4114eed705fc3cc4eebe45e622a944c860eb17e71fa5ecae0ccc2d. 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/USA2P1322619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50794ccf66eecf0efe47fb61dbfa352b5afde9c2f7bb8b00fbc838c2f9b957a. 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/USA2P1322620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d4aedd7245bff0e12a274edab3802122e3cd34f1e8329e35ac952f1daa4ae3. 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/USA2P1322621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487dbfdebb170abf4805ba56051c6edfd0434437fd10cbcafb854ceea7b3036f. 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/USA2P1322622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b6d3c91bc81ad61faf0bdd0b7d784b4cb00178d5bab5cb6c1635b32855395a. 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/USA2P1322623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b3c124afe56628a43d8dc2bfc05dc7068300ea4796351090ae94c81183ed3. 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/USA2P1322624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a126724036468ecf972f659c2d362f725fc5bc17a2a4f86686ad5a3327a5b. 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/USA2P1322625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ed72daa2a47d37942a275a62c836baa4c352cc7a2f9512e344f0f99120140. 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/USA2P1322626.