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 0xddc29ed2cba005924bbfdb2a3b9dbadc3322591879aa5bcfcdc8413eae8de033. 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/7ab7cb74-3374-4060-9940-f246f4d99996.json and https://artists.proofprofile.net/proofs/artist/7ab7cb74-3374-4060-9940-f246f4d99996.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 0x1350bad659f404dfe662c46baa3da2461b47e7fef5abb84493bf346902845413. 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/GXD7V2322154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce8b3d3d27feb1a12335d3d6beb2a1c08119a984552d4e8073434eac4d169b2. 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/MXUM62300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18087c513234d200e0666caf5d480fde902f1ebf8f0b00f74eef127fe7e22a3. 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/MXUM62300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb9983133c2ac75852b5c27b75df36429bc94225ffbf62563e80c7a64dd2c0. 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/SGB502599962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca943b16bab948a0f223967ec323a7234cd96603ae1c4206a9d2b8caaaf3e650. 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/GX53U2347832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054f64eb30d5726a78297b0272bdde919a436cfcbffa9e464728d81a22adf048. 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/DGA0H2457710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d1993ada09aabf7d1b6e6159619c8bc4fc6b7b250f0259b45e743231d900f7. 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/GXD7G2431901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a127f8229aedc27ffb6191b7861f1d671fa7652b15e6a6f1813da19557e4cf. 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/MXUM62400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7143c99a58371447b59563ea831fbaeb23a0171e2b931f13817c3b9663fbd233. 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/TCAHN2316031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9fc1fff366f46ae94fdd8213391c6cde3fa8a68400653e8b3695b509680877. 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/TCAHI2334919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08504dde9a96b8cb97cf215b0a960b82b114256bc1206f7af13eeec0df8cf4e. 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/QZES92342655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5da2e01998f5e12f20ecd8e40e9c03ba41e6ee1a89878d125b204eecfaf610d. 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/QZHN92258617.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ebcbb56bc56feea421896eb7bafb2811298145a7c6d96cb016f6d28ca49b84. 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/QM6N22460682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c749f63288b011db93cd34c5c84b2b10a3721e4b00bb09f4ae6d7f6ad72f815. 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/SGW502316276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0997f91efa474e0b11f5937f8c616bdf0f79e5ce9557f946f99f2aad33a0f01a. 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/QZW9N2241601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c70466335e7e40b5e8900338a99cc786ce2e73fb6e02aaf8a89015b1aed9e9. 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/SGW502316278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6566c467797ca879407dfeeb3e4bed63f70d0811a37686b52d474aee618ebf7c. 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/SGW502316279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b448a1725998e45ebff0aaf77f2b990fc3e072a43b160689cc454ec7517034. 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/MXUM62300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b448a1725998e45ebff0aaf77f2b990fc3e072a43b160689cc454ec7517034. 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/MXUM62300520.